Patent US2876231A successfully refreshed from Google Patents.
US2876231A
Expired / Lapsed
US
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Certain oxazolo benzothiazole compounds and process
Assignee: GAF Chemicals Corp
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Filing: 1957-02-25
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Granted: 1959-03-03
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Expires: 1977-02-25
Abstract
No abstract record available.
Inventors
- 👤 Horwitz Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:22
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
16 words
SENSITIZING DYE INTERMEDIATES SELECTED FROM THE GROUP CONSISTING OF THE COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULAE:
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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |