Patent US2680755A successfully refreshed from Google Patents.
US2680755A
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Method of obtaining trans polyene compounds
Assignee: Eastman Kodak Co
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Filing: 1952-01-22
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Granted: 1954-06-08
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Expires: 1972-01-22
Abstract
No abstract record available.
Inventors
- 👤 Charles D Robeson
- 👤 James G Baxter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
C; C07; C07C; C07C403/00; C07C403/06; C07C403/08; C07C403/12; C07C403/20; C07B; C07B2200/00; C07B2200/09; C07C2601/00; C07C2601/12; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
THE METHOD OF OBTAINING A CRYSTALLINE A,BUNSATURATED POLYENE COMPOUND HAVING A TRANS CONFIGURATION WITH RESPECT TO THE SECOND OLEFINIC DOUBLE BOND FROM THE RING AND HAVING THE FORMULA
Claim 2
Independent Claim
28 words
THE METHOD OF OBTAINING A CRYSTALLINE A,BUNSATURATED POLYENE COMPOUND HAVING A TRANS CONFIGURATION WITH RESPECT TO THE SECOND OLEFINIC DOUBLE BOND FROM THE RING AND HAVING THE FORMULA
References Cited (Backward Citations)
US2576103A
Cited
US2576104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |