US2912433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitizing dyes containing a 6, 7-dihydro-5-h-thiopyrano (3, 2d) thiazole
Assignee: Unisys Corp
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Filing: 1956-04-27
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Granted: 1959-11-10
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Expires: 1976-04-27
Abstract
No abstract record available.
Inventors
- 👤 Robert H Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:26
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/04; C08; C08G; C08G75/00; C08G75/02; C08G75/18; C08G75/20; C09; C09B; C09B23/00; C09B23/02; C09B23/10; C09B23/14; C09B23/145; C09B23/146
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
12 words
A DYE SELECTED FROM THE GROUP CHARACTERIZED BY THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
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US2336843A
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US2494032A
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US2571775A
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US2610190A
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US2647050A
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US2735770A
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US2706193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |