US2989438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying heparin, and product produced therefrom
Assignee: Sanofi Aventis France
•
Filing: 1958-12-29
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Granted: 1961-06-20
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Expires: 1978-12-29
Abstract
No abstract record available.
Inventors
- 👤 Nomine Gerard
- 👤 Barthelemy Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:20
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0063; C08B37/0075
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
THE BENZYL DIMETHYL - 2 - (2 - (P - 1,1,3,3 - TETRAMETHYL BUTYL PHENOXY) ETHOXY) ETHYL AMMONIUM SALT OF HEPARIN.
Claim 2
Dependent Claim
21 words
THE BENZYL DIMETHYL - 2 - (2 - (P - 1,1,3,3 - TETRAMETHYL BUTYL PHENOXY) ETHOXY) ETHYL AMMONIUM SALT OF HEPARIN.
Claim 3
Dependent Claim
53 words
IN THE PROCESS OF PREPARING HEPARIN BY PRECIPITATING AN IMPURE AQUEOUS SOLUTION OF HEPARIN WITH A QUATERNARY AMMONIUM HALOGENIDE AND SEPARATING HEPARIN FROM THE PRECIPITATED QUATERNARY AMMONIUM SALT, THE IMPROVEMENT WHICH CONSISTS IN ADDING TO AN IMPURE AQUEOUS SOLUTION OF HEPARIN A BENZYL DI-(LOWER)ALKYL-2-(2-(P-HIGHER ALKYL PHENOXY) ETHOXY) ETHYL AMMONIUM HALOGENIDE OF THE FORMULA
Claim 4
Dependent Claim
53 words
IN THE PROCESS OF PREPARING HEPARIN BY PRECIPITATING AN IMPURE AQUEOUS SOLUTION OF HEPARIN WITH A QUATERNARY AMMONIUM HALOGENIDE AND SEPARATING HEPARIN FROM THE PRECIPITATED QUATERNARY AMMONIUM SALT, THE IMPROVEMENT WHICH CONSISTS IN ADDING TO AN IMPURE AQUEOUS SOLUTION OF HEPARIN A BENZYL DI-(LOWER)ALKYL-2-(2-(P-HIGHER ALKYL PHENOXY) ETHOXY) ETHYL AMMONIUM HALOGENIDE OF THE FORMULA
References Cited (Backward Citations)
US2623001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |