US2797184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of heparin
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-07-01
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Granted: 1957-06-25
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Expires: 1973-07-01
Abstract
No abstract record available.
Inventors
- 👤 Lester L Coleman
- 👤 Spaulding Lucian Bayard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:41
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K31/715
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
IN A PROCESS FOR THE RECOVERY OF HEPARIN, THE STEPS OF PREPARING AN AQUEOUS SOLUTION OF A PROTEIN-HEPARIN MIXTURE HAVING A PH OF A LEAST SEVEN, ADDING SUFFICIENT SOLUBLE SALT TO SAID SOLUTION TO PRODUCE AN ANION CONCENTRATION OF BETWEEN ABOUT ONE MOLE AND ABOUT SATURATION PER LITER, ACIDIFYING THE SALT CONTAINING TO A PH OF LESS THAN 4.0 TO PRECIPITATE THE PROTEIN, AND RECOVERING HEPARIN FROM THE REMAINING SOLUTION.
Claim 2
Dependent Claim
70 words
IN A PROCESS FOR THE RECOVERY OF HEPARIN, THE STEPS OF PREPARING AN AQUEOUS SOLUTION OF A PROTEIN-HEPARIN MIXTURE HAVING A PH OF A LEAST SEVEN, ADDING SUFFICIENT SOLUBLE SALT TO SAID SOLUTION TO PRODUCE AN ANION CONCENTRATION OF BETWEEN ABOUT ONE MOLE AND ABOUT SATURATION PER LITER, ACIDIFYING THE SALT CONTAINING TO A PH OF LESS THAN 4.0 TO PRECIPITATE THE PROTEIN, AND RECOVERING HEPARIN FROM THE REMAINING SOLUTION.
References Cited (Backward Citations)
US2410084A
Cited
US2623001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |