US2870198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of choline salts
Assignee: Nopco Chemical Co
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Filing: 1954-03-22
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Granted: 1959-01-20
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Expires: 1974-03-22
Abstract
No abstract record available.
Inventors
- 👤 Howard C Klein
- 👤 Salvo Walter Anthony Di
- 👤 Kapp Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:22
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/40; A; A61; A61K; A61K31/00; A61K31/13; A61K31/14; C07C213/00; C07C213/04; C07C213/08; C07C213/10; C07C59/00; C07C59/235; C07C59/245; C07C59/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PREPARING A CRYSTALLINE ANHYDROUS SALT OF CHOLINE HAVING A PURITY OF AT LEAST 99% WHICH COMPRISES THE STEPS OF (1) REACTING AT LEAST ONE MOL OF ETHYLENE OXIDE WITH ONE MOL OF TRIMETHYLAMINE IN AN AQUEOUS ALCOHOLIC SOLUTLION CONTAINING ONE MOL OF WATER FOR EACH MOL OF SAID TRIMETHYLAMINE, THE ALCOHOL WHICH IS EMPLOYED CONTAINING FROM 1 TO 4 CARBON ATOMS AND BEING WATER-MISCIBLE, (2) ADMIXING THE RESULTNG CHOLINE CONTAINED IN THE REACTION MIXTURE WITH AT LEAST ONE MOL OF AN ACID FOR EACH MOL OF SAID CHOLINE THEREBY FORMING A SALT OF SAID CHOLINE, (3) CRYSTALLIZING OUT OF SAID REACTION MIXTURE SAID CHOLINE SALT, AND (4) RECOVERING SAID CRYSTALLINE ANHYDROUS CHOLINE SALT.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PREPARING A CRYSTALLINE ANHYDROUS SALT OF CHOLINE HAVING A PURITY OF AT LEAST 99% WHICH COMPRISES THE STEPS OF (1) REACTING AT LEAST ONE MOL OF ETHYLENE OXIDE WITH ONE MOL OF TRIMETHYLAMINE IN AN AQUEOUS ALCOHOLIC SOLUTLION CONTAINING ONE MOL OF WATER FOR EACH MOL OF SAID TRIMETHYLAMINE, THE ALCOHOL WHICH IS EMPLOYED CONTAINING FROM 1 TO 4 CARBON ATOMS AND BEING WATER-MISCIBLE, (2) ADMIXING THE RESULTNG CHOLINE CONTAINED IN THE REACTION MIXTURE WITH AT LEAST ONE MOL OF AN ACID FOR EACH MOL OF SAID CHOLINE THEREBY FORMING A SALT OF SAID CHOLINE, (3) CRYSTALLIZING OUT OF SAID REACTION MIXTURE SAID CHOLINE SALT, AND (4) RECOVERING SAID CRYSTALLINE ANHYDROUS CHOLINE SALT.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |