US2592964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of dibasic acids
Assignee: Union Oil Company of California
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Filing: 1949-05-05
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Granted: 1952-04-15
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Expires: 1969-05-05
Abstract
No abstract record available.
Inventors
- 👤 Andrew I Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:21
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/21; C07C51/215; C07C51/225; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PROCESS FOR THE PRODUCTION OF SUCCINIC ACID WHICH COMPRISES OXIDIZING A PARAFFINIC HYDROCARBON BY BLOWING WITH A GAS CONTAINING FREE OXYGEN AT A TEMPERATURE BETWEEN ABOUT 100* AND 160* C. TO PRODUCE AN OXIDIZED PARAFFIN HYDROCARBON, WATER WASHING SAID OXIDIZED PARAFFIN HYDROCARBON TO PRODUCE AN AQUEOUS EXTRACT OF OXIDIZED PARAFFIN HYDROCARBON, DEHYDATING SAID AQUEOUS EXTRACT BY HEATING IN THE PRESENCE OF AN AROMATIC HYDROCARBON HAVING LESS THAN 9 CARBON ATOMS PER MOLECULE AT A TEMPERATURE SUFFICIENT TO PRODUCE A DISTILLATE CONTAINING WATER AND SAID AROMATIC HYDROCARBON AND LEAVE A RESIDUE OF DEHYDRATED WATER-SOLUBLE EXTRACT DISSOLVED IN SAID AROMATIC HYDROCARBON AND COOLING SAID SOLUTION TO SEPARATE SOLID SUCCINIC ACID THEREFROM.
Claim 2
Dependent Claim
110 words
A PROCESS FOR THE PRODUCTION OF SUCCINIC ACID WHICH COMPRISES OXIDIZING A PARAFFINIC HYDROCARBON BY BLOWING WITH A GAS CONTAINING FREE OXYGEN AT A TEMPERATURE BETWEEN ABOUT 100* AND 160* C. TO PRODUCE AN OXIDIZED PARAFFIN HYDROCARBON, WATER WASHING SAID OXIDIZED PARAFFIN HYDROCARBON TO PRODUCE AN AQUEOUS EXTRACT OF OXIDIZED PARAFFIN HYDROCARBON, DEHYDATING SAID AQUEOUS EXTRACT BY HEATING IN THE PRESENCE OF AN AROMATIC HYDROCARBON HAVING LESS THAN 9 CARBON ATOMS PER MOLECULE AT A TEMPERATURE SUFFICIENT TO PRODUCE A DISTILLATE CONTAINING WATER AND SAID AROMATIC HYDROCARBON AND LEAVE A RESIDUE OF DEHYDRATED WATER-SOLUBLE EXTRACT DISSOLVED IN SAID AROMATIC HYDROCARBON AND COOLING SAID SOLUTION TO SEPARATE SOLID SUCCINIC ACID THEREFROM.
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) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |