Patent US2731493A successfully refreshed from Google Patents.
US2731493A
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Choline esters
Assignee: F Hoffmann La Roche AG
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Filing: 1954-01-25
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Granted: 1956-01-17
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Expires: 1974-01-25
Abstract
No abstract record available.
Inventors
- 👤 Aeschlimann John Alfred
- 👤 Stempel Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:50
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/62; C07C211/63; C07C303/00; C07C303/32; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14; C07C309/28; C07C309/29; C07C309/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A COMPOUND OF THE GROUP CONSISTING OF BENZENESULFONIC ACID SALTS OF LOWER ALIPHATIC ACID ESTERS OF CHOLINE AND TOULENE-SULFONIC ACID SALTS OF LOWER ALIPHATIC ACID ESTERS OF CHOLINE.
Claim 2
Dependent Claim
28 words
A COMPOUND OF THE GROUP CONSISTING OF BENZENESULFONIC ACID SALTS OF LOWER ALIPHATIC ACID ESTERS OF CHOLINE AND TOULENE-SULFONIC ACID SALTS OF LOWER ALIPHATIC ACID ESTERS OF CHOLINE.
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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |