Patent US2999714A successfully refreshed from Google Patents.
Patent US3101330A successfully refreshed from Google Patents.
US3101330A
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US
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Process for preparing methylol starch propionamide
Assignee: Unilever Bestfoods North America
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Filing: 1959-05-19
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Granted: 1963-08-20
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Expires: 1979-05-19
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Paschall
- 👤 Jr Frederick D Thayer
- 👤 William H Minkema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:01
CPC Classifications
C; C09; C09D; C09D103/00; C09D103/04; C09D103/08; C08; C08B; C08B31/00; C08B31/08; C08B31/12; C08B31/125; D; D06; D06M; D06M15/00; D06M15/01; D06M15/03; D06M15/11
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR PREPARING METHYLOL STARCH PROPIONAMIDE, IN WHICH THE METHYLOL GROUP IS ATTACHED TO THE AMIDE NITROGEN, AND WHICH CONTAINS SOME FREE HYDROXYL GROUPS PER ANHYDROGLUCOSE RESIDUE OF STARCH, WHICH COMPRISES REACTING STARCH AND ACRYLAMIDE IN AN AQUEOUS ALKALINE MEDIUM AND TREATING THE RESULTING PRODUCT WITH FORMALDEHYDE IN AN AQUEOUS ALKALINE MEDIUM AT A PH OF 7 TO 11.
Claim 2
Dependent Claim
60 words
A PROCESS FOR PREPARING METHYLOL STARCH PROPIONAMIDE, IN WHICH THE METHYLOL GROUP IS ATTACHED TO THE AMIDE NITROGEN, AND WHICH CONTAINS SOME FREE HYDROXYL GROUPS PER ANHYDROGLUCOSE RESIDUE OF STARCH, WHICH COMPRISES REACTING STARCH AND ACRYLAMIDE IN AN AQUEOUS ALKALINE MEDIUM AND TREATING THE RESULTING PRODUCT WITH FORMALDEHYDE IN AN AQUEOUS ALKALINE MEDIUM AT A PH OF 7 TO 11.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |