US5373738A
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US
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Humidity detector
Assignee: Xerox Corp
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Filing: 1993-02-01
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Granted: 1994-12-20
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Expires: 2013-02-01
Abstract
Abstract A humidity detector with a supporting substrate and a ladder polymer coating, which can be utilized in xerographic imaging and printing apparatuses.
Inventors
- 👤 Martin A. Abkowitz
- 👤 Homer Antoniadis
- 👤 Samson A. Jenekhe
- 👤 Milan Stolka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:50
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/20; G03G21/203; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
36 words
A humidity detector comprised of a supporting substrate and thereover a ladder polymer selected from the group consisting of those represented by the following formulas ##STR1## and mixtures thereof, wherein n represents the number of segments.
Claim 2
Dependent Claim
36 words
A humidity detector comprised of a supporting substrate and thereover a ladder polymer selected from the group consisting of those represented by the following formulas ##STR1## and mixtures thereof, wherein n represents the number of segments.
Claim 3
Dependent Claim
51 words
A humidity detector consisting essentially of a plurality of substrates and thereover or therebetween a ladder polymer selected from the group consisting of those represented by the following formulas ##STR2## and mixtures thereof, wherein n represents the number of segments and is a number of from about 10 to about 1,000.
Claim 4
Dependent Claim
51 words
A humidity detector consisting essentially of a plurality of substrates and thereover or therebetween a ladder polymer selected from the group consisting of those represented by the following formulas ##STR2## and mixtures thereof, wherein n represents the number of segments and is a number of from about 10 to about 1,000.
Claim 5
Dependent Claim
12 words
A detector in accordance with claim 2 wherein two substrates are selected.
Claim 6
Dependent Claim
22 words
A detector in accordance with claim 3 wherein the substrates are comprised of the metals gold, silver, nickel, or indinium tin oxide.
Claim 7
Dependent Claim
17 words
A detector in accordance with claim 2 wherein said ladder polymer is situated between two conductive substrates.
Claim 8
Dependent Claim
17 words
A detector in accordance with claim 5 wherein the thickness of each substrate is about 200 Angstroms.
Claim 9
Dependent Claim
17 words
A detector in accordance with claim 2 wherein the plurality of substrates are comprised of a metal.
Claim 10
Dependent Claim
18 words
A detector in accordance with claim 1 wherein said substrate is gold, silver, nickel, or indinium tin oxide.
Claim 11
Dependent Claim
22 words
A detector in accordance with claim 2 wherein the thickness of each substrate is from about 1 micron to about 100 mils.
Claim 12
Dependent Claim
21 words
A detector in accordance with claim 2 wherein the thickness of at least one substrate is less than about 200 Angstroms.
Claim 13
Dependent Claim
15 words
A detector in accordance with claim 1 wherein the substrate is comprised of a metal.
Claim 14
Dependent Claim
23 words
A detector in accordance with claim 1 wherein the thickness of said ladder polymer layer is from about 0.1 to about 5 microns.
Claim 15
Dependent Claim
19 words
A detector in accordance with claim 1 with a dc dark conductivity of about 10 -14 (ohm-cm) -1 .
Claim 16
Dependent Claim
29 words
A detector in accordance with claim 1 wherein the ladder polymer is of the following formula ##STR3## wherein n is a number from between about 10 and about 1,000.
Claim 17
Dependent Claim
47 words
A humidity detector consisting essentially of a supporting substrate and in contact therewith and coated thereover a ladder polymer wherein the ladder polymer is selected from the group consisting of those represented by the following formulas ##STR4## and mixtures thereof, wherein n represents the number of segments.
Claim 18
Dependent Claim
47 words
A humidity detector consisting essentially of a supporting substrate and in contact therewith and coated thereover a ladder polymer wherein the ladder polymer is selected from the group consisting of those represented by the following formulas ##STR4## and mixtures thereof, wherein n represents the number of segments.
Claim 19
Dependent Claim
65 words
An imaging or printing apparatus containing a relative humidity detector, which detector consists essentially of a supporting substrate and in contact with said supporting substrate and coated thereover a ladder polymer selected from the group consisting of those represented by the following formulas ##STR5## and mixtures thereof, wherein n represents the number of segments, and is a number of from about 10 to about 1,000.
Claim 20
Dependent Claim
65 words
An imaging or printing apparatus containing a relative humidity detector, which detector consists essentially of a supporting substrate and in contact with said supporting substrate and coated thereover a ladder polymer selected from the group consisting of those represented by the following formulas ##STR5## and mixtures thereof, wherein n represents the number of segments, and is a number of from about 10 to about 1,000.
Claim 21
Dependent Claim
61 words
An imaging or printing apparatus containing a relative humidity detector, which detector is comprised of two supporting substrates and in contact with said substrate a ladder polymer selected from the group consisting of those represented by the following formulas ##STR6## and mixtures thereof, wherein n represents the number of segments, and is a number of from about 10 to about 1,000.
Claim 22
Dependent Claim
61 words
An imaging or printing apparatus containing a relative humidity detector, which detector is comprised of two supporting substrates and in contact with said substrate a ladder polymer selected from the group consisting of those represented by the following formulas ##STR6## and mixtures thereof, wherein n represents the number of segments, and is a number of from about 10 to about 1,000.
Claim 23
Dependent Claim
19 words
An imaging or printing apparatus in accordance with claim 17 wherein the ladder polymer is situated between said substrates.
Claim 24
Dependent Claim
57 words
A humidity sensor comprised of a supporting substrate, coated over said substrate a ladder polymer selected from the group consisting of those represented by the following formulas ##STR7## and mixtures thereof, wherein n represents the number of segments, and is a number of from about 10 to about 1,000; and coated thereover on said ladder polymer electrodes.
Claim 25
Dependent Claim
57 words
A humidity sensor comprised of a supporting substrate, coated over said substrate a ladder polymer selected from the group consisting of those represented by the following formulas ##STR7## and mixtures thereof, wherein n represents the number of segments, and is a number of from about 10 to about 1,000; and coated thereover on said ladder polymer electrodes.
Claim 26
Dependent Claim
25 words
A humidity sensor in accordance with claim 19 wherein two areas of electrodes are present, and wherein said electrodes are effectively spaced from each other.
Claim 27
Dependent Claim
16 words
A humidity sensor in accordance with claim 20 wherein the electrodes are comprised of a metal.
Claim 28
Dependent Claim
15 words
A humidity sensor in accordance with claim 20 wherein the electrodes are comprised of gold.
Claim 29
Dependent Claim
15 words
A humidity sensor in accordance with claim 19 wherein two areas of electrodes are present.
Claim 30
Dependent Claim
24 words
A humidity sensor in accordance with claim 23 wherein said electrodes have a space therebetween of from about 1 micron to 5 about millimeters.
Claim 31
Dependent Claim
24 words
A humidity sensor in accordance with claim 19 wherein said electrodes have a space therebetween of from about 1 micron to about 5 millimeters.
Claim 32
Dependent Claim
54 words
A process for detecting humidity in electrostatographic imaging or printing apparatuses which comprises incorporating into said apparatus a humidity detector comprised of a supporting substrate and coated thereover a ladder polymer selected from the group consisting of those represented by the following formulas ##STR8## and mixtures thereof, wherein n represents the number of segments.
Claim 33
Dependent Claim
54 words
A process for detecting humidity in electrostatographic imaging or printing apparatuses which comprises incorporating into said apparatus a humidity detector comprised of a supporting substrate and coated thereover a ladder polymer selected from the group consisting of those represented by the following formulas ##STR8## and mixtures thereof, wherein n represents the number of segments.
Claim 34
Dependent Claim
36 words
A process in accordance with claim 26 and wherein said ladder polymer is selected from the group consisting of those represented by the following formulas ##STR9## and mixtures thereof, wherein n represents the number of segments.
Claim 35
Dependent Claim
59 words
A process in accordance with claim 26 wherein the apparatus contains a photoconductive imaging member with a latent image thereon, which image is developed with a toner composition, and subsequently transferred to a supporting substrate, and wherein the relative humidity in said apparatus can be measured in the range of from about 0 to about 95 percent relative humidity.
Claim 36
Dependent Claim
14 words
A process in accordance with claim 28 wherein the relative humidity was 50 percent.
Claim 37
Dependent Claim
47 words
A process in accordance with claim 29 wherein the conductivity of said humidity detector is 4×10 -14 (ohm-cm) -1 in a vacuum of 10 -7 Torr, and which conductivity is increased to about 10 -10 (ohm-cm) -1 when the relative humidity in air is about 50 percent.
Claim 38
Dependent Claim
73 words
A process for detecting relative humidity in an imaging or printing apparatus containing a relative humidity detector, and which apparatus also contains a photoconductive imaging member, and wherein the detector comprises a plurality of supporting substrates and thereover a polymer, the improvement residing wherein said polymer is the ladder polymer selected from the group consisting of those represented by the following formulas ##STR10## and mixtures thereof, wherein n represents the number of segments.
Claim 39
Dependent Claim
73 words
A process for detecting relative humidity in an imaging or printing apparatus containing a relative humidity detector, and which apparatus also contains a photoconductive imaging member, and wherein the detector comprises a plurality of supporting substrates and thereover a polymer, the improvement residing wherein said polymer is the ladder polymer selected from the group consisting of those represented by the following formulas ##STR10## and mixtures thereof, wherein n represents the number of segments.
Claim 40
Dependent Claim
12 words
A process in accordance with claim 31 wherein two substrates are selected.
References Cited (Backward Citations)
US3992205A
Cited
US4156757A
Cited
US4265990A
Cited
US4251612A
Cited
US4429029A
Cited
US4442422A
Cited
US4620942A
Cited
US4556622A
Cited
US4603372A
Cited
US4587189A
Cited
US4646066A
Cited
US4761710A
Cited
US4792508A
Cited
US5034772A
Cited
US4983741A
Cited
US4882254A
Cited
US5205920A
Cited
US4965698A
Cited
US5177549A
Cited
US5055367A
Cited
US5248580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |