US2798080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing mixed anhydrides of carboxylic acids
Assignee: Eastman Kodak Co
•
Filing: 1956-05-10
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Granted: 1957-07-02
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Edward U Elam
- 👤 Robert H Hasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:20
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/04; C07C; C07C51/00; C07C51/54; C07C51/56; C07D307/00; C07D307/02; C07D307/04; C07D307/10; C07D307/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A PROCESS OF MANUFACTURING A MIXTED ANHYDRIDE OF TWO CARBONOXYLIC ACIDS, WHICH COMPRISES REACTING KETENE, IN THE PRESENCE OF AN ACID CATALYST, WITH AN ESTER WHICH HAS THE FORMULA
Claim 2
Dependent Claim
29 words
A PROCESS OF MANUFACTURING A MIXTED ANHYDRIDE OF TWO CARBONOXYLIC ACIDS, WHICH COMPRISES REACTING KETENE, IN THE PRESENCE OF AN ACID CATALYST, WITH AN ESTER WHICH HAS THE FORMULA
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |