US3544545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1:1 chromium complexed dyes containing hydroxy aromatic azopyrazolones,beta-hydroxy - alpha,beta - unsaturated carbonyls and a hydroquinonyl group
Assignee: Polaroid Corp
•
Filing: 1969-01-03
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Granted: 1970-12-01
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Expires: 1989-01-03
Abstract
No abstract record available.
Inventors
- 👤 Elbert M Idelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:19
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16; G03C8/18; C; C09; C09B; C09B45/00; C09B45/02; C09B45/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3067191A
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US2708193A
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US2871232A
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US3134764A
Cited
US3134672A
Cited
US3301845A
Cited
US3134765A
Cited
US3141772A
Cited
US3406162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |