US3081296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acylation of starch and cellulose
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1961-04-12
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Granted: 1963-03-12
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Expires: 1981-04-12
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Smith
- 👤 John V Tuschhoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:02
CPC Classifications
C; C08; C08B; C08B31/00; C08B31/003; C08B31/006; C08B3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE PROCESS OF PREPARING CROSS-LINKED POLYSACCHARIDE ACYLATES, WHICH COMPRISES ACYLATING A POLYSACCHARIDE SELECTED FROM THE GROUP CONSISTING OF STARCH AND CELLULOSE WITH A VINYL ESTER OF A MONOCARBOXYLIC ACID AT AN ALKALINE PH, WHEREBY ACETALDEHYDE IS GENERATED IN SITU, ADJUSTING THE PH OF THE REACTION MISTURE TO BELOW 4, WHEREBY THE ACYLATION REACTION IS TERMINATED, AND MAINTAINING THE PH BELOW 4 TO CAUSE SAID ACETALDEHYDE TO REACT WITH THE POLYSACCHARIDE.
Claim 2
Dependent Claim
70 words
THE PROCESS OF PREPARING CROSS-LINKED POLYSACCHARIDE ACYLATES, WHICH COMPRISES ACYLATING A POLYSACCHARIDE SELECTED FROM THE GROUP CONSISTING OF STARCH AND CELLULOSE WITH A VINYL ESTER OF A MONOCARBOXYLIC ACID AT AN ALKALINE PH, WHEREBY ACETALDEHYDE IS GENERATED IN SITU, ADJUSTING THE PH OF THE REACTION MISTURE TO BELOW 4, WHEREBY THE ACYLATION REACTION IS TERMINATED, AND MAINTAINING THE PH BELOW 4 TO CAUSE SAID ACETALDEHYDE TO REACT WITH THE POLYSACCHARIDE.
References Cited (Backward Citations)
US2342612A
Cited
US2461139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |