US3030387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of hydrocarbon substituted succinic acid anhydrides
Assignee: California Research LLC
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Filing: 1956-08-01
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Granted: 1962-04-17
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Expires: 1976-08-01
Abstract
No abstract record available.
Inventors
- 👤 Jr George J Benoit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:57
CPC Classifications
C; C07; C07C; C07C55/00; C07C55/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PROCESS FOR PREPARING ALKYL SUCCINIC ACID ANHYDRIDES AND CLCLOALKYL SUCCINIC ACID ANHDRIDES WHICH COMPRISES REACTING A MOLAR EXCESS OF A MEMBER OF THE GROUP CONSISTING OF ALKANES AND CYLOALKANES OF FROM 6 TO 32 CARBON ATOMS WITH MALEIC ANHYDRIDE IN A CLOSED SYSTEM UNDER AUTOGENOUS PRESSURE AT A TEMPERATURE FROM ABOUT 220*F. TO ABOUT 400*F. AND IN THE PRESENCE OF DITERTIARY BUTYL PEROXIDE FREE RADICAL INITIATOR CATALYST.
Claim 2
Dependent Claim
68 words
A PROCESS FOR PREPARING ALKYL SUCCINIC ACID ANHYDRIDES AND CLCLOALKYL SUCCINIC ACID ANHDRIDES WHICH COMPRISES REACTING A MOLAR EXCESS OF A MEMBER OF THE GROUP CONSISTING OF ALKANES AND CYLOALKANES OF FROM 6 TO 32 CARBON ATOMS WITH MALEIC ANHYDRIDE IN A CLOSED SYSTEM UNDER AUTOGENOUS PRESSURE AT A TEMPERATURE FROM ABOUT 220*F. TO ABOUT 400*F. AND IN THE PRESENCE OF DITERTIARY BUTYL PEROXIDE FREE RADICAL INITIATOR CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |