US2996498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic starch ethers soluble in water and in alcohol
Assignee: Ingredion Inc
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Filing: 1959-01-05
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Granted: 1961-08-15
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Expires: 1979-01-05
Abstract
No abstract record available.
Inventors
- 👤 Jarowenko Wadym
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:39
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A METHOD FOR MAKING A WATER-SOLUBLE AND ALCOHOLSOLUBLE THERMOPLASTIC DERIVATIVE OF STARCH, COMPRISING SUSPENDING STARCH IN A LIQUID MEDIUM CONTAINING AN ALKALINE ETHERIFICATION CATALYST, AND REACTING SAID SUSPENDED STARCH AT A TEMPERATURE FROM 30*-90*C. WITH AT LEAST 100%, BASED ON THE DRY WEIGHT OF THE STARCH, OF AN ALIPHATIC ALKYLENE OXIDE CONTAINING FROM 2 TO 5 CARBON ATOMS, SAID LIQUID MEDIUM BEING ONE IN WHICH THE STARCH DERIVATIVE RESULTING FROM SAID REACTION IS SOLUBLE AND CONSISTING ESSENTIALLY OF A MIXTURE OF WATER AND A POLAR ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF LOW MOLECULAR WEIGHT ALIPHATIC SECONDARY AND TERTIARY ALCOHOLS AND CYCLIC ETHERS.
Claim 2
Independent Claim
104 words
A METHOD FOR MAKING A WATER-SOLUBLE AND ALCOHOLSOLUBLE THERMOPLASTIC DERIVATIVE OF STARCH, COMPRISING SUSPENDING STARCH IN A LIQUID MEDIUM CONTAINING AN ALKALINE ETHERIFICATION CATALYST, AND REACTING SAID SUSPENDED STARCH AT A TEMPERATURE FROM 30*-90*C. WITH AT LEAST 100%, BASED ON THE DRY WEIGHT OF THE STARCH, OF AN ALIPHATIC ALKYLENE OXIDE CONTAINING FROM 2 TO 5 CARBON ATOMS, SAID LIQUID MEDIUM BEING ONE IN WHICH THE STARCH DERIVATIVE RESULTING FROM SAID REACTION IS SOLUBLE AND CONSISTING ESSENTIALLY OF A MIXTURE OF WATER AND A POLAR ORGANIC SOLVENT SELECTED FROM THE CLASS CONSISTING OF LOW MOLECULAR WEIGHT ALIPHATIC SECONDARY AND TERTIARY ALCOHOLS AND CYCLIC ETHERS.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |