Patent US3728124A successfully refreshed from Google Patents.
US3728124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloration of polyester film materials
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-12-02
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Granted: 1973-04-17
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Expires: 1990-12-02
Abstract
Abstract GRAY DYED POLYESTER PHOTOGRAPHIC FILM SUPPORT DYED WITH AT LEAST TWO DYE COMPONENTS SELECTED FROM 6-PARATOLUIDINO-3-METHYL 1''9'' ANTHRAPIRIDONE, INDANTHRONE, TETRACHLORO PHTHALO PERINONE AND 1,4-BIS(4-N-BU YL-ANILINO)5,8-DIHYDROXY ANTHRAQUINONE.
Inventors
- 👤 J Whyte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/183; C08K; C08K5/00; C08K5/0008; C08K5/0041; C09; C09B; C09B1/00; C09B1/50; C09B1/51; C09B1/514; C09B5/00; C09B5/02; C09B5/14; C09B5/24; C09B5/44; C09B5/46; C09B5/48; C09B57/00; C09B57/12; G03C1/825; G03C1/83
Claims Analysis
Total Claims: 0
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |