US2851488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polycarboxylic acids
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1956-02-02
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Granted: 1958-09-09
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Expires: 1976-02-02
Abstract
No abstract record available.
Inventors
- 👤 Ira D Elkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:26
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/27; C07G; C07G99/00; C07G99/002; C07G99/0022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PREPARING A SUCCINIC ACID SELECTED FROM THE CLASS CONSISTING OF SUCCINIC ACID AND LOWER ALKYL SUBSTITUTED SUCCINIC ACIDS COMPRISING REACTING A PARAFFINIC HYDROCARBON HAVING A CARBON CHAIN OF A LENGTH GREATER THAN FOUR CARBON ATOMS WITH A SULFURIZING AGENT TO PRODUCE A SULFURIZED HYDROCARBON PRODUCT, AND TEN OXIDIZING THE SULFURIZED HYDROCARBON PRODUCT WITH AN OXIDIZING AGENT TO PRODUCE THE SUCCINIC ACID.
Claim 2
Dependent Claim
64 words
A PROCESS FOR PREPARING A SUCCINIC ACID SELECTED FROM THE CLASS CONSISTING OF SUCCINIC ACID AND LOWER ALKYL SUBSTITUTED SUCCINIC ACIDS COMPRISING REACTING A PARAFFINIC HYDROCARBON HAVING A CARBON CHAIN OF A LENGTH GREATER THAN FOUR CARBON ATOMS WITH A SULFURIZING AGENT TO PRODUCE A SULFURIZED HYDROCARBON PRODUCT, AND TEN OXIDIZING THE SULFURIZED HYDROCARBON PRODUCT WITH AN OXIDIZING AGENT TO PRODUCE THE SUCCINIC ACID.
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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |