Patent US3076808A successfully refreshed from Google Patents.
US3076808A
Expired / Lapsed
US
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Anthrapyridone dye developers
Assignee: Polaroid Corp
•
Filing: 1961-11-07
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Granted: 1963-02-05
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Expires: 1981-11-07
Abstract
No abstract record available.
Inventors
- 👤 Elkan R Blout
- 👤 Myron S Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:16
CPC Classifications
C; C09; C09B; C09B5/00; C09B5/02; C09B5/14; G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A DYE DEVELOPER OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A DYE DEVELOPER OF THE FORMULA:
References Cited (Backward Citations)
US2644821A
Cited
GB525091A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |