US2572923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uniformly substituted glucopyranose polymers and process for their preparation
Assignee: Ohio State University Research Foundation
•
Filing: 1947-10-23
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Granted: 1951-10-30
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Expires: 1967-10-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Gaver
- 👤 Esther P Lasure
- 👤 Derk V Tieszen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:38
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08; C08B37/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A METHOD OF MAKING UNIFORMLY 2,3 SUBSTITUTED GLUCOPYRANOSE POLYMERS COMPRISING REACTING GLUCOPYRANOSE POLYMERS WITH ALKALI METAL HYDROXIDE IN A SUBSTANTIALLY NON-AQUEOUS ALCOHOLIC SYSTEM IN WHICH THERE IS ENOUGH OF THE ALKALI TO PRODUCE AN 0.04 N SOLUTION AND TO PERMIT TWO MOLES OF ALKALI TO REACT WITH EACH MOLEE UNIT OF CARBOHYDRATE AND HAVING AN IONIZATION CONSTANT OF 2X10-5 OR GREATER AT A TEMPERATURE OF 115* C. OR HIGHER; AND REMOVING WATER FORMED BY THE REACTION OF THE ALKALINE REACTING MATERIAL WITH THE CARBOHYDRATE.
Claim 2
Independent Claim
84 words
A METHOD OF MAKING UNIFORMLY 2,3 SUBSTITUTED GLUCOPYRANOSE POLYMERS COMPRISING REACTING GLUCOPYRANOSE POLYMERS WITH ALKALI METAL HYDROXIDE IN A SUBSTANTIALLY NON-AQUEOUS ALCOHOLIC SYSTEM IN WHICH THERE IS ENOUGH OF THE ALKALI TO PRODUCE AN 0.04 N SOLUTION AND TO PERMIT TWO MOLES OF ALKALI TO REACT WITH EACH MOLEE UNIT OF CARBOHYDRATE AND HAVING AN IONIZATION CONSTANT OF 2X10-5 OR GREATER AT A TEMPERATURE OF 115* C. OR HIGHER; AND REMOVING WATER FORMED BY THE REACTION OF THE ALKALINE REACTING MATERIAL WITH THE CARBOHYDRATE.
Claim 3
Dependent Claim
22 words
A SUBSTANTIALLY UNIFORMLY SUBSTITUTED GLUCOPYRANOSE POLYMER CONSISTING OF INTERLINKED AND POLYMERIZED SUBSTANTIALLY UNIFORMLY SUBSTITUTED GLUCOPYRANOSE UNITS, EACH HAVING THE FOLLOWING STRUCTURAL FORMULA
Claim 4
Dependent Claim
22 words
A SUBSTANTIALLY UNIFORMLY SUBSTITUTED GLUCOPYRANOSE POLYMER CONSISTING OF INTERLINKED AND POLYMERIZED SUBSTANTIALLY UNIFORMLY SUBSTITUTED GLUCOPYRANOSE UNITS, EACH HAVING THE FOLLOWING STRUCTURAL FORMULA
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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |