US2671810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long-chain diketones
Assignee: EIDP Inc
•
Filing: 1952-05-24
•
Granted: 1954-03-09
•
Expires: 1972-05-24
Abstract
No abstract record available.
Inventors
- 👤 Coffman Donald Drake
- 👤 Cripps Harry Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:42
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/20; C07C49/203; C07C45/00; C07C45/51; C07C45/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A LONG-CHAIN UNSATURATED DIKETONE HAVING TWO NONCONJUGATED ETHYLENIC DOUBLE BONDS, OF THE FORMULA
Claim 2
Dependent Claim
13 words
A LONG-CHAIN UNSATURATED DIKETONE HAVING TWO NONCONJUGATED ETHYLENIC DOUBLE BONDS, OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |