US3709795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of carboxylic acids by chemical treatment and distillation
Assignee: Monsanto Co
•
Filing: 1970-02-02
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Granted: 1973-01-09
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Expires: 1990-02-02
Abstract
Abstract A PROCESS FOR THE REMOVAL OF HALIDE IMPURITIES FROM CARBOXYLIC ACIDS, SAID PROCESS COMPRISING CONTACTING A CARBOXYLIC ACID CONTANING HALIDE IMPURITIES WITH A TREATING AGENT COMPRISING AN INORGANIC OXIDIZING AGENT, SUBJECTING THE TREATED CARBOXYLIC ACID STREAM TO DISTILLATION TO REMOVE AN OVERHEAD AND A BOTTOMS PRODUCT, SAID OVERHEAD PRODUCT CONTAINING SAID CARBOXYLIC ACID SUBSTANTIALLY PURIFIED OF SAID HALIDE IMPURITIES.
Inventors
- 👤 T Singleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:12
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |