US3574631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apomerocyanine dyes and photographic emulsions sensitized therewith
Assignee: Ferrania SpA
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Filing: 1967-11-02
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Granted: 1971-04-13
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Expires: 1987-11-02
Abstract
Abstract AS A SENSITIZING DYE AN APOMEROCYANINE OF THE FORMULA 2-(S=),3-R3,4-(O=),5-((2-(R1-S-),4-R2-4,5-DIHYDRO- 1,3,4-THIADIAZOL-5-YLIDENE)=)THIAZOLIDINE WHEREIN R1 AND R2 ARE ALKYL OR ARALKYL AND R3 IS ALKYL, ALKENYL OR ARYL, AND PHOTOGRAPHIC EMULSIONS SENSITIZED THEREWITH.
Inventors
- 👤 Mario Gandino
- 👤 Agostino Baldassarri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:29
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0008; C09B23/005; C09B23/0058; C09B23/10; C09B23/102
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |