US3763138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing hydrolyzed modified gelatin followed by reaction with dibasic acid anhydride
Assignee: EIDP Inc
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Filing: 1972-05-31
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Granted: 1973-10-02
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Expires: 1992-05-31
Abstract
Abstract A METHOD OF PREPARING A HYDROLYZED MODIFIED GELATIN BY FIRST HYDROLYZING A GELATIN IN AN AQUEOUS SOLUTION OF A STRONG ACID (PH 0.1-2.0) OR A STRONG BASE (PH 10.513.5) AND THEN MODIFYING THE HYDROLYZED GELTAIN BY REACTING THE PRODUCT FROM THE HYDROLYSIS WITH A DIBASIC ACID ANHYDRIDE. THE DIBASIC ACID ANHYDRIDE MAY COMPRISE AN ALIPHATIC, AROMATIC, CYCLOALIPHATIC, CYCLOOLEFINIC OR HETEROCYCLIC RADICAL HAVING THE ANHYDRIDE GROUP ATTACHED THERETO.
Inventors
- 👤 B Rakoczy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:49
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/04; C07D265/12; C07D265/14; C07D265/24; C07D265/26; A; A23; A23J; A23J3/00; A23J3/04; A23J3/06; A23J3/30; A23J3/32; G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |