Patent US5169439A successfully refreshed from Google Patents.
US5169439A
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Marking fluid
Assignee: Schwan Stabilo Schwanhausser GmbH and Co KG
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Filing: 1991-03-14
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Granted: 1992-12-08
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Expires: 2011-03-14
Abstract
Abstract A marking fluid based on an aqueous solution of hydroxyprene trisulfonic acid as a fluorescence dyestuff and having a pH-value in the alkaline range. The marking fluid further includes at least one mono, oligo or polysaccharide, or a polyol derived therefrom by reduction, or a mixture thereof, to improve the properties of the fluid in a number of respects. The marking fluid can be used on a wide range of different surfaces and affords improved fastness in relation to light.
Inventors
- 👤 Ivan Horvat
- 👤 Peter Kramp
- 👤 Erhard Onczul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:33
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/50; C09D11/16; C09D11/17; C09B; C09B57/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
88 words
A marking fluid based on an aqueous solution of hydroxypyrene trisulfonic acid as a fluorescence dyestuff (C.I. Solvent Green 7 No. 59040), which has a pH-value in the alkaline range, and including at least one substance selected from the group consisting of mono, oligo and polysaccharides, polyols derived therefrom by reduction, and mixtures of said substances in an amount of approximately 5 to 50% by weight, wherein said marking fluid can be used on a wide range of different surfaces and affords improved fastness in relation to light.
Claim 2
Dependent Claim
88 words
A marking fluid based on an aqueous solution of hydroxypyrene trisulfonic acid as a fluorescence dyestuff (C.I. Solvent Green 7 No. 59040), which has a pH-value in the alkaline range, and including at least one substance selected from the group consisting of mono, oligo and polysaccharides, polyols derived therefrom by reduction, and mixtures of said substances in an amount of approximately 5 to 50% by weight, wherein said marking fluid can be used on a wide range of different surfaces and affords improved fastness in relation to light.
Claim 3
Dependent Claim
29 words
A marking fluid as set forth in claim 1 wherein the at least one substance is at least one saccharide which corresponds to a naturally occurring form of saccharide.
Claim 4
Dependent Claim
39 words
A marking fluid as set forth in claim 1 wherein the content of the at least one saccharide in the marking fluid is approximately between 10 and 20% by weight with respect to the total weight of the fluid.
Claim 5
Dependent Claim
20 words
A marking fluid as set forth in claim 1 wherein said at least one substance includes at least one pentose.
Claim 6
Dependent Claim
18 words
A marking fluid as set forth in claim 4 wherein the at least one pentose is a xylose.
Claim 7
Dependent Claim
20 words
A marking fluid as set forth in claim 1 wherein said at least one substance includes at least one aldohexose.
Claim 8
Dependent Claim
22 words
A marking fluid as set forth in claim 6 wherein the at least one aldohexose is selected from glucose, mannose and galactose.
Claim 9
Dependent Claim
20 words
A marking fluid as set forth in claim 1 wherein said at least one substance includes at least one ketohexose.
Claim 10
Dependent Claim
21 words
A marking fluid as set forth in claim 8 wherein the at least one ketohexose is selected from fructose and sorbose.
Claim 11
Dependent Claim
20 words
A marking fluid as set forth in claim 1 wherein said at least one substance includes at least one disaccharide.
Claim 12
Dependent Claim
24 words
A marking fluid as set forth in claim 10 wherein the at least one disaccharide is selected from saccharose, lactose, maltose, trehalose and cellobiose.
Claim 13
Dependent Claim
20 words
A marking fluid as set forth in claim 1 wherein said at least one substance includes at least one trisaccharide.
Claim 14
Dependent Claim
18 words
A marking fluid as set forth in claim 12 wherein the at least one trisaccharide is a raffinose.
Claim 15
Dependent Claim
20 words
A marking fluid as set forth in claim 1 wherein said at least one substance includes at least one polysaccharide.
Claim 16
Dependent Claim
24 words
A marking fluid as set forth in claim 14 wherein the at least one polysaccharide is derived from maize, rice, wheat or potato starch.
Claim 17
Dependent Claim
17 words
A marking fluid as set forth in claim 1 and including at least one further water-soluble dyestuff.
Claim 18
Dependent Claim
17 words
A marking fluid as set forth in claim 16 wherein the further water soluble dyestuff is fluorescing.
Claim 19
Dependent Claim
20 words
A marking fluid as set forth in claim 17 wherein the further water soluble dyestuff is a daylight fluorescing dyestuff.
Claim 20
Dependent Claim
25 words
A marking fluid as set forth in claim 1 wherein the fluid is buffered to a pH-value in the range between about 8 and 13.
Claim 21
Dependent Claim
22 words
A marking fluid as set forth in claim 19 wherein buffering is effected to a pH-value of between about 9 and 10.
Claim 22
Dependent Claim
12 words
A marking fluid as set forth in claim 19 and including trishydroxymethylaminomethane.
Claim 23
Dependent Claim
23 words
A marking fluid as set forth in claim 1 wherein the fluid further includes a preserving agent to protect it from microbial action.
Claim 24
Dependent Claim
14 words
A marking fluid as set forth in claim 22 and containing an isothiazolinone derivative.
Claim 25
Dependent Claim
15 words
A marking fluid as set forth in claim 1 and including a water-soluble binding agent.
Claim 26
Dependent Claim
14 words
A marking fluid as set forth in claim 1 and including a wetting agent.
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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) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |