US3058884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for purifying heparin
Assignee: Abbott Laboratories
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Filing: 1959-09-14
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Granted: 1962-10-16
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Expires: 1979-09-14
Abstract
No abstract record available.
Inventors
- 👤 Milton M Mozen
- 👤 Thomas D Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:50
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K31/715
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN THE PROCESS OF ISOLATING A WATER-INSOLUBLE HEPARIN COMPLEX FROM THE AQUEOUS ANIMAL EXTRACT CONTAINING HEPARIN, THE STEP COMPRISING: ADDING A QUATERNARY AMMONIUM SALT WHICH DISSOLVES IN WATER TO AT LEAST 2% AND IN WHICH ONE OF THE VALENCIES OF THE NITROGEN ATOM CARRIES AN ESSENTIALLY ALIPHATIC HYDROCARBON CHAIN OF AT LEAST 8 CARBON ATOMS, SAID COMPOUND BEING ADDED IN AN AMOUNT OF FROM 10 TO 30 MOLES PER 108 HEPARIN UNITS.
Claim 2
Dependent Claim
72 words
IN THE PROCESS OF ISOLATING A WATER-INSOLUBLE HEPARIN COMPLEX FROM THE AQUEOUS ANIMAL EXTRACT CONTAINING HEPARIN, THE STEP COMPRISING: ADDING A QUATERNARY AMMONIUM SALT WHICH DISSOLVES IN WATER TO AT LEAST 2% AND IN WHICH ONE OF THE VALENCIES OF THE NITROGEN ATOM CARRIES AN ESSENTIALLY ALIPHATIC HYDROCARBON CHAIN OF AT LEAST 8 CARBON ATOMS, SAID COMPOUND BEING ADDED IN AN AMOUNT OF FROM 10 TO 30 MOLES PER 108 HEPARIN UNITS.
References Cited (Backward Citations)
US2989438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-15 | 1966-04-16 | 1966-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-15 | 1970-04-16 | 1970-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-15 | 1974-04-16 | 1974-10-16 | $7700.00 | Window Closed / Lapsed |