US2515595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 2,4-pentadienoic acids
Assignee: Shell Development Co
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Filing: 1948-07-20
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Granted: 1950-07-18
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Expires: 1968-07-20
Abstract
No abstract record available.
Inventors
- 👤 Bradford P Geyer
- 👤 Seaver A Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:34
CPC Classifications
C; C07; C07C; C07C57/00; C07C57/30; C07C51/00; C07C57/02; C07C57/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR THE PRODUCTION OF 2,4-PENTADIENOIC ACID WHICH COMPRISES PASSING KETENE INTO ACROLEIN PRESENT IN THE LIQUID STATE IN HE PRESENCE OF SODIUM ACETATE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT -25*C. TO ABOUT +30* C., AND RECOVERING 2,4-PENTADIENOIC ACID FROM THE MIXTURE.
Claim 2
Dependent Claim
46 words
A PROCESS FOR THE PRODUCTION OF 2,4-PENTADIENOIC ACID WHICH COMPRISES PASSING KETENE INTO ACROLEIN PRESENT IN THE LIQUID STATE IN HE PRESENCE OF SODIUM ACETATE AT A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT -25*C. TO ABOUT +30* C., AND RECOVERING 2,4-PENTADIENOIC ACID FROM THE MIXTURE.
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) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |