US3700453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistain agents comprising mixtures of secondary-alkylhydroquinones
Assignee: Eastman Kodak Co
•
Filing: 1970-03-06
•
Granted: 1972-10-24
•
Expires: 1990-03-06
Abstract
Abstract MIXTURES OF AT LEAST TWO SECONDARYALKYLHYDROQUINONES IN WHICH THERE ARE FROM ONE TO TWO SECONDARY-ALKYL SUBSTITUENTS EACH HAVING HAVING 9 TO 20 CARBON ATOMS AND, PREFERABLY, MIXTURES THAT CONTAIN SECONDARY-ALKYLHYDROQUINONE ISOMERS THAT ARE EUTECTICS WITH LOW EUTECTIC POINTS, I.E., NEAR OR BELOW ROOM TEMPERATURE, ARE PHOTOGRAPHIC ANTISTAIN AGENTS THAT ARE SUPERIOR IN CHEMICAL AND PHYSICAL PROPERTIES TO ANTISTAIN AGENTS DESCRIBED IN THE PRIOR ART. DISPERSIONS OF THE IMMEDIATE ANTISTAIN AGENTS IN HYDROPHILIC COLLOIDS CAN BE HELD BEFORE COATING AT TEMPERATURES BELOW ROOM TEMPERATURE WITHOUT CRYSTALLIZING WHILE ANTISTAIN AGENTS OUTSIDE THE INVENTION DO CRYSTALLIZE.
Inventors
- 👤 William F Knechel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:39
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216; G03C1/00; G03C1/76; G03C1/815; G03C1/8155
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |