US3489813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha,alpha-bis(trifluoromethyl)benzyl alkapolyenyl ethers
Assignee: Shell USA Inc
•
Filing: 1967-08-21
•
Granted: 1970-01-13
•
Expires: 1987-08-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth C Dewhirst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:52
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/22; C07C; C07C11/00; C07C11/21; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08G59/18; C08G59/20; C08G59/22; C08G59/226; C08G59/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3267169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-12 | 1973-07-14 | 1974-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-12 | 1977-07-14 | 1978-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-12 | 1981-07-14 | 1982-01-13 | $7700.00 | Window Closed / Lapsed |