Patent US3567637A successfully refreshed from Google Patents.
US3567637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing over-based alkaline earth long-chain alkenyl succinates
Assignee: Standard Oil Co
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Filing: 1969-04-02
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Granted: 1971-03-02
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Expires: 1989-04-02
Abstract
Abstract OVER-BASED ALKALINE EARTH SALTS OF LONG CHAIN ALKENYLSUBSTITUTED SUCCINIC ANHYDRIDE OR ACID (HEREINAFTER REFERRED TO AS ALKALINE EARTH LONG CHAIN ALKENYL SUCCINATES) ARE PREPARED BY REACTING A LONG CHAIN ALKENYL-SUBSTITUTED) SUCCINIC ANHYDRIDE OR ACID, HAVING AT LEAST 30 CARBON ATOMS IN THE ALKENYL SUBSTITUENT, OR THE ALKALINE EARTH SALT THEREOF, WITH MORE THAN STOICHIOMETRIC AMOUNTS OF AN INORGANIC BASIC ALKALINE EARTH COMPOUND IN THE PRESENCE OF A LOWER ALKANOL, SUFFICIENT AMOUNTS OF GASEOUS CARBON DIOXIDE TO CONVERT THE EXCESS BASIC ALKALINE EARTH COMPOUND TO CARBONATE, AND CATALYTIC AMOUNTS OF AMMONIA.
Inventors
- 👤 Albert R Sabol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:22
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/20
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |