US2671780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processes for the preparation of new carbohydrate compounds and products thereof
Assignee: Ohio State University Research Foundation
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Filing: 1951-01-16
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Granted: 1954-03-09
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Expires: 1971-01-16
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M Gaver
- 👤 Derk V Tieszen
- 👤 Esther P Lasure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:31
CPC Classifications
C; C07; C07H; C07H13/00; C07H13/02; C07H13/04; C07H15/00; C07H15/02; C07H15/04; C08; C08B; C08B31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A PROCESS OF PRODUCING SUBSTANTIALLY UNIFORMYL SUBSTITUTED 2-ALKALI METAL, 6-ALKYL GLUCOPYRANOSE POLYMER WHICH COMPRISES THE STEPS OF REACTING STARCH BY MIXING IT WITH AN ALKALI METAL DISSOLVED IN LIQUID AMMONIA; MIXING THE 6-ALKALI METAL STARCHATE SO FORMED WITH AN ALKYL HALIDE DISPERSED IN A NONAQUEOUS SOLVENT AT A TEMPERATURE IN THE RANGE OF 80* C. TO ABOUT 118* C. TO PRODUCE A 6-ALKYL STARCHATE; MIXING THE ALKYL STARCHATE SO FORMED WITH AN ALKALI METAL HYDROXIDE AT A TEMPERATURE IN THE RANGE OF APPROXIMATELY 80* C. TO 115* C. IN A SUBSTANTIALLY NONAQUEOUS ALCOHOLIC SYSTEM IN WHICH THE ALCOHOL BOILS AT A TEMPERATURE ABOVE 78* C. AT 760 MM. PRESSURE WITH THE ALKALI HYDROXIDE SUPPLIED IN AT LEAST STOICHIOMETRIC QUANTITIES TO CAUSE A REACTION TO PRODUCE THE 2-ALKALI METAL, 6-ALKYL STARCHATE.
Claim 2
Dependent Claim
130 words
A PROCESS OF PRODUCING SUBSTANTIALLY UNIFORMYL SUBSTITUTED 2-ALKALI METAL, 6-ALKYL GLUCOPYRANOSE POLYMER WHICH COMPRISES THE STEPS OF REACTING STARCH BY MIXING IT WITH AN ALKALI METAL DISSOLVED IN LIQUID AMMONIA; MIXING THE 6-ALKALI METAL STARCHATE SO FORMED WITH AN ALKYL HALIDE DISPERSED IN A NONAQUEOUS SOLVENT AT A TEMPERATURE IN THE RANGE OF 80* C. TO ABOUT 118* C. TO PRODUCE A 6-ALKYL STARCHATE; MIXING THE ALKYL STARCHATE SO FORMED WITH AN ALKALI METAL HYDROXIDE AT A TEMPERATURE IN THE RANGE OF APPROXIMATELY 80* C. TO 115* C. IN A SUBSTANTIALLY NONAQUEOUS ALCOHOLIC SYSTEM IN WHICH THE ALCOHOL BOILS AT A TEMPERATURE ABOVE 78* C. AT 760 MM. PRESSURE WITH THE ALKALI HYDROXIDE SUPPLIED IN AT LEAST STOICHIOMETRIC QUANTITIES TO CAUSE A REACTION TO PRODUCE THE 2-ALKALI METAL, 6-ALKYL STARCHATE.
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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |