Patent US3135660A successfully refreshed from Google Patents.
US3135660A
Expired / Lapsed
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Method for purifying sulfated carbohydrates with oxidizing agents
Assignee: Riker Laboratories Inc
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Filing: 1961-02-13
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Granted: 1964-06-02
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Jess A Bush
- 👤 Leon D Freeman
- 👤 Elliot B Hagerty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:21
CPC Classifications
C; C08; C08B; C08B37/00; C08B37/006; C08B37/0063; C08B37/0075
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS OF PURIFYING SULFATED CARBOHYDRATES WHICH COMPRISES TREATING AN AQUEOUS SOLUTION OF A SULFATED CARBOHYDRATE AT A TEMPERATURE NOT EXCEEDING ROOM TEMPERATURE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE HALOGENS, THE WATER SOLUBLE SALTS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF PERMANGANIC, BROMIC, PERBORIC, PERSULFURIC, HYPOCHLOROUS, CHLORIC, DICHROMIC, CHROMIC, IODIC, HYPOIODOUS, PERCHLORIC, PERIODIC AND HYPOBROMOUS ACIDS, AND ACIDS SELECTED FROM THE GROUP CONSISTING OF HYPOCHLOROUS, HYPOBROMOUS AND PERCHLORIC ACIDS, AND SEPARATING A PURIFIED SULFATED CARBOHYDRATE FROM THE SOLUTION.
Claim 2
Dependent Claim
84 words
A PROCESS OF PURIFYING SULFATED CARBOHYDRATES WHICH COMPRISES TREATING AN AQUEOUS SOLUTION OF A SULFATED CARBOHYDRATE AT A TEMPERATURE NOT EXCEEDING ROOM TEMPERATURE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE HALOGENS, THE WATER SOLUBLE SALTS OF AN ACID SELECTED FROM THE GROUP CONSISTING OF PERMANGANIC, BROMIC, PERBORIC, PERSULFURIC, HYPOCHLOROUS, CHLORIC, DICHROMIC, CHROMIC, IODIC, HYPOIODOUS, PERCHLORIC, PERIODIC AND HYPOBROMOUS ACIDS, AND ACIDS SELECTED FROM THE GROUP CONSISTING OF HYPOCHLOROUS, HYPOBROMOUS AND PERCHLORIC ACIDS, AND SEPARATING A PURIFIED SULFATED CARBOHYDRATE FROM THE SOLUTION.
References Cited (Backward Citations)
US2830931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |