US2533620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of succinic acid
Assignee: Union Oil Company of California
•
Filing: 1948-05-24
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Granted: 1950-12-12
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Expires: 1968-05-24
Abstract
No abstract record available.
Inventors
- 👤 Orville L Polly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; C07C51/225; C07C51/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR THE PRODUCTION OF SUCCINIC ACID WHICH COMPRISES OXIDIZING A PARAFFNIC HYDROCARBON AT A TEMPERATURE BETWEEN 100 DEGREE C. AND 160 DEGREE C. BY BLOWING WITH AN OXYGEN-CONTAINING GAS UNTIL THE ACID NUMBER OF THE RESULTING OXIDIZING MIXTURE IS BETWEEN 200 AND 250 MG. OF KOH PER GRAM, DISCONTINUING SAID OXIDATION, WATER WASHING SAID OXIDIZED MIXTURE AT A TEMPERATURE BETWEEN ABOUT 50 DEGREE C. AND 130 DEGREE C. TO PRODUCE A WATER-SOLUBLE EXTRACT, EVAPORATING SAID WATERSOLUBLE EXTRACT TO REMOVE WATER AND OXIDATION PRODUCTS MORE VOLATILE THAN SUCCINIC ACID AND THEREBY FORMING AN EVAPORATED WATER-SOLUBLE EXTRACT, COOLING SAID EVAPORATED WATER-SOLUBLE EXTRACT AND THEREBY CAUSING SOLID SUCCINIC ACID TO RECIPITATE THEREFROM AND REMOVING SAID SUCCINIC ACID.
Claim 2
Dependent Claim
116 words
A PROCESS FOR THE PRODUCTION OF SUCCINIC ACID WHICH COMPRISES OXIDIZING A PARAFFNIC HYDROCARBON AT A TEMPERATURE BETWEEN 100 DEGREE C. AND 160 DEGREE C. BY BLOWING WITH AN OXYGEN-CONTAINING GAS UNTIL THE ACID NUMBER OF THE RESULTING OXIDIZING MIXTURE IS BETWEEN 200 AND 250 MG. OF KOH PER GRAM, DISCONTINUING SAID OXIDATION, WATER WASHING SAID OXIDIZED MIXTURE AT A TEMPERATURE BETWEEN ABOUT 50 DEGREE C. AND 130 DEGREE C. TO PRODUCE A WATER-SOLUBLE EXTRACT, EVAPORATING SAID WATERSOLUBLE EXTRACT TO REMOVE WATER AND OXIDATION PRODUCTS MORE VOLATILE THAN SUCCINIC ACID AND THEREBY FORMING AN EVAPORATED WATER-SOLUBLE EXTRACT, COOLING SAID EVAPORATED WATER-SOLUBLE EXTRACT AND THEREBY CAUSING SOLID SUCCINIC ACID TO RECIPITATE THEREFROM AND REMOVING SAID 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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |