US3070595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing polysulfuric acid esters of polysaccharides
Assignee: Riker Laboratories Inc
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Filing: 1960-10-28
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Granted: 1962-12-25
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Expires: 1980-10-28
Abstract
No abstract record available.
Inventors
- 👤 Francis J Petracek
- 👤 Marshall D Draper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:45
CPC Classifications
C; C08; C08B; C08B37/00; C07; C07H; C07H11/00; C08B31/00; C08B31/02; C08B31/06; C08B31/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF PRODUCING A POLYSULFURIC ACID ESTER OF A POLYSACCHARIDE HAVING POLYGLUCOSE UNITS WITH PREDOMINANTLY A-1,4 AND A-1,6 LINKAGES WHICH COMPRISES TREATING A POLYSACCHARIDE SELECTED FROM THE GROUP CONSISTING OF CORN SYRUP SOLIDS AND CORM STARCH DEXTRIN CONTAINING AN AVERAGE OF ABOUT 1 TO ABOUT 25 GLUCOSE UNTIS PER MOLECULE WITH SULFAMIC ACID IN A SUBSTANTIALLY ANHYDROUS REACTION MEDIUM AT A TEMPERATURE BETWEEN ABOUT 70*C. AND ABOUT 118*C. FOR BETWEEN ABOUT 1.5 HOURS AND ABOUT FIVE MINUTES, SAID SULFAMIC ACID BEING ADDED IN AN AMOUNT OF ABOUT 3 TO ABOUT 10 PARTS BY WEIGHT PER PART BY WEIGHT OF SAID POLYSACCHARIDE.
Claim 2
Independent Claim
102 words
A METHOD OF PRODUCING A POLYSULFURIC ACID ESTER OF A POLYSACCHARIDE HAVING POLYGLUCOSE UNITS WITH PREDOMINANTLY A-1,4 AND A-1,6 LINKAGES WHICH COMPRISES TREATING A POLYSACCHARIDE SELECTED FROM THE GROUP CONSISTING OF CORN SYRUP SOLIDS AND CORM STARCH DEXTRIN CONTAINING AN AVERAGE OF ABOUT 1 TO ABOUT 25 GLUCOSE UNTIS PER MOLECULE WITH SULFAMIC ACID IN A SUBSTANTIALLY ANHYDROUS REACTION MEDIUM AT A TEMPERATURE BETWEEN ABOUT 70*C. AND ABOUT 118*C. FOR BETWEEN ABOUT 1.5 HOURS AND ABOUT FIVE MINUTES, SAID SULFAMIC ACID BEING ADDED IN AN AMOUNT OF ABOUT 3 TO ABOUT 10 PARTS BY WEIGHT PER PART BY WEIGHT OF SAID POLYSACCHARIDE.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |