Patent US3979327A successfully refreshed from Google Patents.
US3979327A
Expired / Lapsed
US
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Dye solvents for pressure-sensitive copying systems
Assignee: Monsanto Co
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Filing: 1975-09-08
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Granted: 1976-09-07
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Expires: 1995-09-08
Abstract
Abstract Solvent compositions useful to dissolve color formers employed in pressure-sensitive copying systems comprise: A. about 45 to 55 weight percent of hydrogenated terphenyl having no greater than about 40% hydrogenation; and B. about 55 to 45 weight percent of I. hexylbenzene; or Ii. a composition comprising about 45 to 75 weight percent C 10 to C 16 alkanes and the balance C 7 to C 10 alkylbenzenes.
Inventors
- 👤 John F. Herber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:34
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/124; B41M5/165; B41M5/1655; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
65 words
A dye solvent composition for use in pressure-sensitive copying systems comprising: A. About 45 to 55 weight percent of hydrogenated terphenyl having no greater than about 40% hydrogenation; and B. About 55 to 45 weight percent of i. hexylbenzene; or ii. a composition comprising about 45 to 75 weight percent C 10 to C 16 alkanes and the balance C 7 to C 10 alkylbenzene.
Claim 2
Dependent Claim
65 words
A dye solvent composition for use in pressure-sensitive copying systems comprising: A. About 45 to 55 weight percent of hydrogenated terphenyl having no greater than about 40% hydrogenation; and B. About 55 to 45 weight percent of i. hexylbenzene; or ii. a composition comprising about 45 to 75 weight percent C 10 to C 16 alkanes and the balance C 7 to C 10 alkylbenzene.
Claim 3
Dependent Claim
13 words
A composition of claim 1 wherein the terphenyl is hydrogenated to about 30%.
Claim 4
Dependent Claim
17 words
A composition of claim 2 wherein component (B) is hexylbenzene present in about 50 parts by weight.
Claim 5
Dependent Claim
33 words
A composition of claim 2 wherein component (B) is a composition comprising about 65 to 75 weight percent C 13 to C 15 alkanes and the balance C 9 to C 10 alkylbenzenes.
References Cited (Backward Citations)
US3846331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |