Patent US3607377A successfully refreshed from Google Patents.
US3607377A
Expired / Lapsed
US
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Electroconductive paper
Assignee: Amicon Corp
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Filing: 1968-12-30
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Granted: 1971-09-21
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Expires: 1988-12-30
Abstract
Abstract A cellulosic paper sheet, suitable for use as a substrate for receiving a coating of a light-sensitive electroconductive material such as zinc oxide, which paper sheet comprises a coating thereon of from 0.5 to 5 lbs. per ream of colloidal chrysolite asbestos and a quantity of lithium chloride therein to impart a surface resistivity of less than 1010 ohms at a relative humidity of 15 percent, while maintaining a volume resistivity of greater than 1010 ohms under the same environmental conditions.
Inventors
- 👤 Robert A Cross
- 👤 John F Hegarty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:42
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/101; H; H01; H01B; H01B1/00; Y; Y10; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/277
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
36 words
A conductive sheet as described in claim 1 which comprises a hygroscopic salt as a component of said coating in a quantity such that a salt-to-absetos ratio of up to about 1 to 1 is achieved.
Claim 2
Dependent Claim
29 words
coating said composition on said paper sheet to deposit, on the surface thereof, a gel network comprising from 0.5 to 5 lbs. of asbestos per ream of paper, and
Claim 3
Dependent Claim
7 words
2 to 10 parts of lithium chloride,
Claim 4
Dependent Claim
10 words
0 to 5 parts of a polyelectrolyte complex resin, and
Claim 5
Dependent Claim
13 words
drying said paper sheet, thereby forming a paper of the desired electroconductive character.
Claim 6
Dependent Claim
15 words
A conductive sheet as described in claim 2 wherein said hygroscopic salt is lithium chloride.
Claim 7
Dependent Claim
33 words
A conductive sheet as described in claim 1 wherein said coating comprises a polyelectrolyte complex resin in a quantity such that a resin-to-asbestos ratio of up to about 0.5 to 1 is achieved.
Claim 8
Dependent Claim
11 words
a quantity of water in which to disperse the foregoing ingredients.
Claim 9
Dependent Claim
32 words
A conductive sheet as defined in claim 4 wherein said polyelectrolyte complex resin is of the type formed by the ionic cross linking of a sulfonate-type polyanion and a quaternary ammonium-type polycation.
Claim 10
Dependent Claim
21 words
A process for imparting electroconductivity to a sheet of paper at humidities as low as 12 percent comprising the steps of:
Claim 11
Dependent Claim
18 words
A process as defined in claim 6 wherein a polyelectrolyte complex resin is included in said coating composition.
Claim 12
Dependent Claim
17 words
A process as defined in claim 7 wherein a hygroscopic salt is included in said coating composition.
Claim 13
Dependent Claim
20 words
A coating composition, suitable for use in imparting conductivity to paper at low humidity levels, said composition consisting essentially of:
Claim 14
Dependent Claim
16 words
The coating composition of claim 9 including at least 2 parts of a polyelectrolyte complex resin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |