US3332897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of grafting monomers onto polysaccharides, and acylating product to obtain an ester
Assignee: Ingredion Inc
•
Filing: 1964-12-21
•
Granted: 1967-07-25
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Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 Ray-Chaudhuri Dilip Kumar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:36
CPC Classifications
C; C08; C08F; C08F251/00; C08B; C08B15/00; C08B3/00; C08B3/06; C08B31/00; C08B31/02; Y; Y10; Y10S; Y10S8/00; Y10S8/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
A PROCESS FOR PREPARING POLYSACCHARIDE ESTERS, WHEREIN MERS OF SAID ESTER CORRESPOND TO THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
55 words
THE PROCESS OF CLAIM 2, WHEREIN THE ACYLATING AGENT IS AN ACID ANHYDRIDE SELECTED FROM THE GROUP CONSISTING OF ACETIC ANHYDRIDE, PROPIONIC ANHYDRIDE, BUTYRIC ANHYDRIDE, AND ANY COMBINATION OF SAID ANHYDRIDES; SAID ACYLATING AGENTS BEING PRESENT IN CONCENTRATIONS OF FROM ABOUT 1.8 TO 3.0 PARTS, BY WEIGHT, PER PART OF POLYSACCHARIDE IN THE GRAFTED POLYSACCHARIDE.
Claim 3
Dependent Claim
24 words
THE PROCESS OF CLAIM 2, WHEREIN THE AMOUNT OF SAID ETHYLENICALLY UNSATURATED MONOMER IS FROM ABOUT 5 TO 125%, BY WEIGHT, OF SAID POLYSACCHARIDE.
References Cited (Backward Citations)
US3127362A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |