US3141035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of choline salicylate
Assignee: Hoffman-Taff Inc
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Filing: 1961-07-17
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Granted: 1964-07-14
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Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Lorz Emil
- 👤 Richard S Bagby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:32
CPC Classifications
C; C07; C07C; C07C65/00; C07C65/01; C07C65/03; C07C65/05; C07C65/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A METHOD FOR PREPARING CHOLINE SALICYLATE, COMPRISING MIXING TRIMETHYLAMINE WITH SALICYLIC ACID IN AQUEOUS MEDIUM IN SUBSTANTIALLY EQUIMOLAR PROPORTIONS TO PRODUCE A TRIMETHYLAMINE SALICYLATE SOLUTION HAVING A PH OF APPROXIMATELY 6, THEN ADDING ETHYLENE OXIDE TO SAID SOLUTION IN APPROXIMATELY EQUIMOLAR AMOUNT WITH RESPECT TO SAID TRIMETHYLAMINE SALICYLATE AND REACTING SAID ETHYLENE OXIDE AND TRIMETHYLAMINE SALICYLATE TO OBTAIN A SUBSTANTIALLY PURE AQUEOUS SOLUTION OF CHOLINE SALICYLATE.
Claim 2
Independent Claim
66 words
A METHOD FOR PREPARING CHOLINE SALICYLATE, COMPRISING MIXING TRIMETHYLAMINE WITH SALICYLIC ACID IN AQUEOUS MEDIUM IN SUBSTANTIALLY EQUIMOLAR PROPORTIONS TO PRODUCE A TRIMETHYLAMINE SALICYLATE SOLUTION HAVING A PH OF APPROXIMATELY 6, THEN ADDING ETHYLENE OXIDE TO SAID SOLUTION IN APPROXIMATELY EQUIMOLAR AMOUNT WITH RESPECT TO SAID TRIMETHYLAMINE SALICYLATE AND REACTING SAID ETHYLENE OXIDE AND TRIMETHYLAMINE SALICYLATE TO OBTAIN A SUBSTANTIALLY PURE AQUEOUS SOLUTION OF CHOLINE SALICYLATE.
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) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |