Patent US3637745A successfully refreshed from Google Patents.
US3637745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(beta-cyanovinyl)-indolines
Assignee: Bayer AG
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Filing: 1967-05-29
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Granted: 1972-01-25
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Expires: 1987-05-29
Abstract
Abstract THIS INVENTION RELATES TO ULTRAVIOLET ABSORBERS BASED ON A SERIES OF SUBSTITUTED N-PHENYLAMINOETHYLENE COMPOUNDS.
Inventors
- 👤 Karl-Heinz Heller
- 👤 Manfred Kreuder
- 👤 Karl Merz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:53
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/08; C07D209/56; C07D209/80; C07D209/82; C07D209/86; C07D215/00; C07D215/02; C07D215/04; C07D215/06; C09; C09K; C09K15/00; C09K15/04; C09K15/30
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |