Patent US3108995A successfully refreshed from Google Patents.
US3108995A
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Method of modifying type a gelatin and product thereof
Assignee: CHARLES B KNOX GELATINE Co Inc
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Filing: 1957-03-01
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Granted: 1963-10-29
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Expires: 1977-03-01
Abstract
No abstract record available.
Inventors
- 👤 Dee Tourtelotte
- 👤 Ernest M Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:39
CPC Classifications
A; A23; A23J; A23J1/00; A23J1/10; A23J3/00; A23J3/04; A23J3/06; A61; A61K; A61K9/00; A61K9/48; A61K9/4816; A61K9/4825
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS OF MODIFYING TYPE A GELATIN HAVING AN ISOELECTRIC ZONE BETWEEN PH 7 AND 9 COMPRISING REACTING TYPE A GELATIN AT A PH RANGE FROM 3 TO 8.5 AND A TEMPERATURE RANGE OF 25 TO 90*C. WITH SUFFICIENT POLYCARBOXYLIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUCCINIC, MALEIC, PHTHALIC, CITRACONIC, ITACONIC AND ACONITIC ANHYDRIDES AND SUCCINYL AND FUMARYL CHLORIDES AND MIXTURES THEREOF TO LOWER THE ISOELECTRIC POINT OF SAID MODIFIED TYPE A GELATIN TO AN ULTIMATE POINT WITHIN THE PH RANGE OF 4.0 TO 5.5.
Claim 2
Dependent Claim
87 words
THE PROCESS OF MODIFYING TYPE A GELATIN HAVING AN ISOELECTRIC ZONE BETWEEN PH 7 AND 9 COMPRISING REACTING TYPE A GELATIN AT A PH RANGE FROM 3 TO 8.5 AND A TEMPERATURE RANGE OF 25 TO 90*C. WITH SUFFICIENT POLYCARBOXYLIC ACID COMPOUND SELECTED FROM THE GROUP CONSISTING OF SUCCINIC, MALEIC, PHTHALIC, CITRACONIC, ITACONIC AND ACONITIC ANHYDRIDES AND SUCCINYL AND FUMARYL CHLORIDES AND MIXTURES THEREOF TO LOWER THE ISOELECTRIC POINT OF SAID MODIFIED TYPE A GELATIN TO AN ULTIMATE POINT WITHIN THE PH RANGE OF 4.0 TO 5.5.
References Cited (Backward Citations)
GB548205A
Cited
US2520581A
Cited
US2580683A
Cited
US2518666A
Cited
US2525753A
Cited
US2592263A
Cited
GB666593A
Cited
US2692201A
Cited
US2719146A
Cited
US2827419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |