Patent US3249393A successfully refreshed from Google Patents.
US3249393A
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US
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Process of dyeing polymeric film
Assignee: Polaroid Corp
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Filing: 1962-01-08
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Granted: 1966-05-03
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Howard C Haas
- 👤 Norman W Schuler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:17
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/56; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
THE PROCESS OF DYEING A POLYMER WHICH COMPRISES APPLYING AN AQUEOUS ALKALINE SOLUTION OF A DYE TO A DYEABLE POLYMERIC FILM, SAID POLYMERIC FILM COMPRISING A POLYMER SELECTED FROM THE CLASS CONSISTING OF (A) 4-VINYLPYRIDINE/N-VINYL-2-PYRROLIDONE COPOLYMERS, AND (B) MIXTURES OF POLY-4-VINYLPYRIDINE AND POLY-N-VINYL-2-PYRROLIDONE, SAID POLYMER CONTAINING AT LEAST 50% 4-VINYLPYRIDINE UNITS.
Claim 2
Dependent Claim
51 words
THE PROCESS OF DYEING A POLYMER WHICH COMPRISES APPLYING AN AQUEOUS ALKALINE SOLUTION OF A DYE TO A DYEABLE POLYMERIC FILM, SAID POLYMERIC FILM COMPRISING A POLYMER SELECTED FROM THE CLASS CONSISTING OF (A) 4-VINYLPYRIDINE/N-VINYL-2-PYRROLIDONE COPOLYMERS, AND (B) MIXTURES OF POLY-4-VINYLPYRIDINE AND POLY-N-VINYL-2-PYRROLIDONE, SAID POLYMER CONTAINING AT LEAST 50% 4-VINYLPYRIDINE UNITS.
References Cited (Backward Citations)
US2643990A
Cited
US2853417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |