US2959583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying sulfated polysaccharides
Assignee: Warner Lambert Co LLC
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Filing: 1959-01-23
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Granted: 1960-11-08
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Expires: 1979-01-23
Abstract
No abstract record available.
Inventors
- 👤 Doczi John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:53
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/0003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD OF PURIFYING A CRUDE SULFATED POLYSACCHARIDE WHICH HAS ACTIVITY IN PROLONGING THE CLOTTING TIME OF BLOOD TO YIELD A FRACTION OF HIGH ANTICOAGULANT ACTIVITY WHICH COMPRISES TREATING AN AQUEOUS ACID SOLUTION OF SAID SULFATED POLYSACCHARIDE WITH A WATER-SOLUBLE QUININE SALT TO FORM A SULFATED POLYSACCHARIDE-QUININE SALT PRECIPITATE AND CONVERTING SAID SULFATED POLYSACCHARIDEQUININE SALT TO A SULFATED POLYSACCHARIDE METAL SALT.
Claim 2
Independent Claim
61 words
A METHOD OF PURIFYING A CRUDE SULFATED POLYSACCHARIDE WHICH HAS ACTIVITY IN PROLONGING THE CLOTTING TIME OF BLOOD TO YIELD A FRACTION OF HIGH ANTICOAGULANT ACTIVITY WHICH COMPRISES TREATING AN AQUEOUS ACID SOLUTION OF SAID SULFATED POLYSACCHARIDE WITH A WATER-SOLUBLE QUININE SALT TO FORM A SULFATED POLYSACCHARIDE-QUININE SALT PRECIPITATE AND CONVERTING SAID SULFATED POLYSACCHARIDEQUININE SALT TO A SULFATED POLYSACCHARIDE METAL 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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |