US3639485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-ozonant
Assignee: Bayer AG
•
Filing: 1968-07-16
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Granted: 1972-02-01
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Expires: 1988-07-16
Abstract
Abstract (CYCLOHEXEN-(3)-YLIDENE-METHYL)-HYDROCARBON ETHERS AND THIOETHER AND THEIR CORRESPONDING 2,5-ENDOMETHYLENE DERIVATIVES, PREPARATION THEREOF AND THEIR USE AS ANTI-OZONANTS.
Inventors
- 👤 Roland Nast
- 👤 Kurt Ley
- 👤 Wolfgang Redetzky
- 👤 Theo Kempermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:16
CPC Classifications
C; C07; C07C; C07C321/00; C08; C08K; C08K5/00; C08K5/04; C08K5/06; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |