Patent US3658874A successfully refreshed from Google Patents.
US3658874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxylation of organic nitriles
Assignee: Texaco Inc
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Filing: 1969-01-27
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Granted: 1972-04-25
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Expires: 1989-01-27
Abstract
Abstract METHOD OF CARBOXYLATING AN ORGANIC COMPOUND OF THE GROUP OF RC$CH, RCH2CN, INDENE OR CYCLOPENTADIENE WHERE R IS HYDROCARBYL COMPRISING CONTACTING UNDER ANHYDROUS CONDITIONS IN AN ENERT ATMOSPHERE AND IN THE PRESENCE OF AN INERT, APROTIC, DIPOLAR, LIQUID SOLVENT, SAID COMPOUND WITH A CARBONATED METAL PHENOXIDE, THE METAL PHENOXIDE OF THE FORMULA: (R1-PHENYL)-O-X WHERE X IS SODIUM OR POTASSIUM, R1 IS HYDROGEN OR ALKYL, AND SUBSEQUENTLY ACIDIFYING THE RESULTANT INTERMEDIATE PRODUCT TO FORM THE CARBOXYLATED PRODUCT.
Inventors
- 👤 Edwin L Patmore
- 👤 William R Siegart
- 👤 Harry Chafetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:23
CPC Classifications
C; C07; C07C; C07C255/00; C07C51/00; C07C51/15; C07C57/00; C07C57/18
Claims Analysis
Total Claims: 0
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |