Patent US4335013A successfully refreshed from Google Patents.
US4335013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvents useful in pressure-sensitive mark-recording systems
Assignee: Bayer Agriculture BVBA
•
Filing: 1980-08-18
•
Granted: 1982-06-15
•
Expires: 2000-08-18
Abstract
Abstract A pressure-sensitive mark-recording system comprising (a) sheet material, (b) mark-forming components supported by the sheet material and arranged in juxtaposition comprising a chromogen material and an acid clay sensitizing agent for the chromogenic material which produces a color from the chromogenic material when brought into contact with the chromogenic material in the presence of a solvent for the chromogenic material with the solvent supported by the sheet material but separated from its sensitizing agent by a physical barrier which is rupturable on the application of the marking instrument to the sheet material, the invention characterized in that the liquid solvent is a solvent comprised of a blend of aromatic hydrocarbon components in which at least one-half the carbon atoms are benzenoid or a mixture of such hydrocarbons, and a diester component.
Inventors
- 👤 Pierre J. Allart
- 👤 Claude A. Guillaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:58
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B41M5/1655; Y; Y10; Y10S; Y10S428/00; Y10S428/914
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
189 words
A solvent suitable for use in a pressure-sensitive mark-recording system, said solvent comprising a blend of an aromatic hydrocarbon component and a diester component, the former being a hydrocarbon in which at least half the carbon atoms are benzenoid or a mixture of such hydrocarbons, characterized in that the diester component is a diester of either of the formulas ROOC(C.sub.n H.sub.2n)COOR.sup.1 or R.sup.2 COO(C.sub.n H.sub.2n)OOCR.sup.3 wherein n is an integer from 1 to 20, R is an aliphatic hydrocarbon group containing up to 18 carbon atoms or a cycloaliphatic hydrocarbon group containing from 5 to 10 carbon atoms and R 1 is an aliphatic hydrocarbon group containing up to 18 carbon atoms or a cycloaliphatic hydrocarbon group containing from 5 to 10 carbon atoms or a benzyl group or an alkylbenzyl group containing up to 3 carbon atoms substituted onto the benzene nucleus and each of R 2 and R 3 is an aliphatic hydrocarbon group containing up to 18 carbon atoms or a mixture of such diesters, and the weight ratio of the aromatic hydrocarbon component to the diester component in the blend is from 85:15 to 10:90.
Claim 2
Dependent Claim
189 words
A solvent suitable for use in a pressure-sensitive mark-recording system, said solvent comprising a blend of an aromatic hydrocarbon component and a diester component, the former being a hydrocarbon in which at least half the carbon atoms are benzenoid or a mixture of such hydrocarbons, characterized in that the diester component is a diester of either of the formulas ROOC(C.sub.n H.sub.2n)COOR.sup.1 or R.sup.2 COO(C.sub.n H.sub.2n)OOCR.sup.3 wherein n is an integer from 1 to 20, R is an aliphatic hydrocarbon group containing up to 18 carbon atoms or a cycloaliphatic hydrocarbon group containing from 5 to 10 carbon atoms and R 1 is an aliphatic hydrocarbon group containing up to 18 carbon atoms or a cycloaliphatic hydrocarbon group containing from 5 to 10 carbon atoms or a benzyl group or an alkylbenzyl group containing up to 3 carbon atoms substituted onto the benzene nucleus and each of R 2 and R 3 is an aliphatic hydrocarbon group containing up to 18 carbon atoms or a mixture of such diesters, and the weight ratio of the aromatic hydrocarbon component to the diester component in the blend is from 85:15 to 10:90.
Claim 3
Dependent Claim
87 words
A solvent according to claim 1 in which the ester component is an ester or mixture of esters of the formula ROOC(C.sub.n H.sub.2n)COOR.sup.1 wherein n is an integer of from 1 to 10, each of R and R 1 is an alkyl or alkenyl group containing up to 18 carbon atoms, or a cyclopentyl, cyclohexyl or methylcyclohexyl group, or R 1 is alternatively a benzyl group or a nuclear alkyl-substituted benzyl group containing up to three alkyl groups each of which contains up to three carbon atoms.
Claim 4
Dependent Claim
23 words
A solvent according to claim 2 in which n in the formula of the diester has a value of from 2 to 8.
Claim 5
Dependent Claim
29 words
A solvent according to either of claims 2 and 3 in which the ester component is a succinate, glutarate or adipate or a mixture of succinate, glutarate and adipate.
Claim 6
Dependent Claim
24 words
A solvent according to claim 2 wherein each of R and R 1 is an alkyl group containing from 4 to 16 carbon atoms.
Claim 7
Dependent Claim
26 words
A solvent according to claim 2 wherein R is an alkyl group containing from 8 to 16 carbon atoms and R 1 is a benzyl group.
Claim 8
Dependent Claim
28 words
A solvent according to claim 2 wherein the proportions by weight of the aromatic hydrocarbon component and the ester component in the blend are from 50:50 to 20:80.
Claim 9
Dependent Claim
16 words
A solvent according to claim 2 which contains at least 50% by weight of the blend.
Claim 10
Dependent Claim
54 words
A solvent according to claim 1 in which the ester component is an ester or a mixture of esters of the formula R.sup.2 COO(C.sub.n H.sub.2n)OOCR.sup.3 where each of R 2 and R 3 is an alkyl or alkenyl group of up to 18 carbon atoms and n has a value from 2 to 10.
Claim 11
Dependent Claim
26 words
A solvent according to claim 9 in which each of R 2 and R 3 is an alkyl group of from 1 to 9 carbon atoms.
Claim 12
Dependent Claim
17 words
A solvent according to claim 9 in which (C n H 2n ) is a 2,2,4-trimethylpent-1,3-ylene group.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |