Patent EP0354958A1 successfully refreshed from Google Patents.
US3449335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Merocyanine dyes containing the carbostyril nucleus
Assignee: GAF Corp
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Filing: 1966-01-03
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Granted: 1969-06-10
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Expires: 1986-01-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Copeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2689849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |