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Patent US2961462A successfully refreshed from Google Patents.
US2961462A
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Dibasic acid treating process
Assignee: Texaco Inc
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Filing: 1957-12-24
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Granted: 1960-11-22
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Expires: 1977-12-24
Abstract
No abstract record available.
Inventors
- 👤 Chafetz Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:47
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48; C07C51/54; C07C51/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
22 words
A PROCESS FOR REMOVING SUCCINIC ANHYDRIDE FROM A MIXTURE THEREOF CONTAINING SUCCINIC ANHYDRIDE AND AT LEAST ONE DIBASIC ACID OF THE FORMULA
Claim 2
Dependent Claim
22 words
A PROCESS FOR REMOVING SUCCINIC ANHYDRIDE FROM A MIXTURE THEREOF CONTAINING SUCCINIC ANHYDRIDE AND AT LEAST ONE DIBASIC ACID OF THE FORMULA
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) | 1963-11-22 | 1964-05-23 | 1964-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-22 | 1968-05-23 | 1968-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-22 | 1972-05-23 | 1972-11-22 | $7700.00 | Window Closed / Lapsed |