Patent US6168631B1 successfully refreshed from Google Patents.
US2824092A
Expired / Lapsed
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Process of preparation of a gelatincarboxymethyl cellulose complex
Assignee: Individual
•
Filing: 1955-01-04
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Granted: 1958-02-18
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Expires: 1975-01-04
Abstract
No abstract record available.
Inventors
- 👤 Robert E Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:21
CPC Classifications
A; A23; A23L; A23L29/00; A23L29/20; A23L29/275; A23L29/281; A23L29/284
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A METHOD OF PREPARING A GLYCOPROTEIN, THE STEPS OF COMBINING A CARBOXYMETHYL CELLULOSE AND GELATIN IN AQUEOUS SOLUTION AT A PH OF FROM 3.5 TO 6.5, DILUTING SAID AQUEOUS SOLUTION WITH WATER TO PRECIPITATE A COMPLEX COMPOSED OF A CARBOXYMETHYL CELLULOSE COMPONENT AND A GELATIN COMPONENT, AND SEPARATING THE RESULTING PRECIPITATE FROM THE AQUEOUS SOLUTION.
Claim 2
Dependent Claim
56 words
IN A METHOD OF PREPARING A GLYCOPROTEIN, THE STEPS OF COMBINING A CARBOXYMETHYL CELLULOSE AND GELATIN IN AQUEOUS SOLUTION AT A PH OF FROM 3.5 TO 6.5, DILUTING SAID AQUEOUS SOLUTION WITH WATER TO PRECIPITATE A COMPLEX COMPOSED OF A CARBOXYMETHYL CELLULOSE COMPONENT AND A GELATIN COMPONENT, AND SEPARATING THE RESULTING PRECIPITATE FROM THE AQUEOUS SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |