US3033852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of propionamide ethers of starch
Assignee: Unilever Bestfoods North America
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Filing: 1958-01-29
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Granted: 1962-05-08
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Expires: 1978-01-29
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Paschall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:46
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PREPARING PROPIONAMIDE AND MIXED PROPIONAMIDE-CARBOXYETHYL ETHERS OF STARCH IN GRANULE FORM, SUCH MIXED ETHERS HAVING A CARBOXYETHYL CONTENT NOT EXCEEDING THE PROPIONAMIDE CONTENT, WHICH COMPRISES REACTING STARCH IN GRANULE FORM IN AN AQUEOUS SLURRY WITH ACRYLAMIDE IN CONTACT WITH AN EFFECTIVE AMOUNT OF AN ALKALINE CATALYST, THE REACTION BEING CARRIED OUT UNDER NON-GELANTINIZING CONDITIONS; THE AMOUNT OF CATALYST NOT EXCEEDING THE EQUIVALENT OF 0.1 MOLE OF SODIUM HYDROXIDE PER MOLE OF STARCH.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PREPARING PROPIONAMIDE AND MIXED PROPIONAMIDE-CARBOXYETHYL ETHERS OF STARCH IN GRANULE FORM, SUCH MIXED ETHERS HAVING A CARBOXYETHYL CONTENT NOT EXCEEDING THE PROPIONAMIDE CONTENT, WHICH COMPRISES REACTING STARCH IN GRANULE FORM IN AN AQUEOUS SLURRY WITH ACRYLAMIDE IN CONTACT WITH AN EFFECTIVE AMOUNT OF AN ALKALINE CATALYST, THE REACTION BEING CARRIED OUT UNDER NON-GELANTINIZING CONDITIONS; THE AMOUNT OF CATALYST NOT EXCEEDING THE EQUIVALENT OF 0.1 MOLE OF SODIUM HYDROXIDE PER MOLE OF STARCH.
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) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |