US3047386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone dye developers
Assignee: Polaroid Corp
•
Filing: 1957-08-26
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Granted: 1962-07-31
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Elkan R Blout
- 👤 Myron S Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; 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
60 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING AN AQUEOUS ALKALINE SOLUTION CONTAINING AT LEAST ONE AUXILIARY SILVER HALIDE DEVELOPING AGENT AND A DYE DEVELOPER HAVING AN ANTHRAQUINONE NUCLEUS, AT LEAST ONE AND NOT MORE THAN TWO OF THE NUCLEAR CARBON ATOMS IN THE ONE FOUR, FIVE AND EIGHT POSITIONS OF SAID ANTHRAQUINONE NUCLEUS HAVING LINKED DIRECTLY THERETO A GROUP OF THE FORMULA:
Claim 2
Dependent Claim
60 words
A PHOTOGRAPHIC DEVELOPER COMPOSITION COMPRISING AN AQUEOUS ALKALINE SOLUTION CONTAINING AT LEAST ONE AUXILIARY SILVER HALIDE DEVELOPING AGENT AND A DYE DEVELOPER HAVING AN ANTHRAQUINONE NUCLEUS, AT LEAST ONE AND NOT MORE THAN TWO OF THE NUCLEAR CARBON ATOMS IN THE ONE FOUR, FIVE AND EIGHT POSITIONS OF SAID ANTHRAQUINONE NUCLEUS HAVING LINKED DIRECTLY THERETO A GROUP OF THE FORMULA:
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |