Patent US4767524A successfully refreshed from Google Patents.
Patent US2949442A successfully refreshed from Google Patents.
US2949442A
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US
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Process for preparing amphoteric copolymers and the resulting products
Assignee: Eastman Kodak Co
•
Filing: 1955-05-04
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Granted: 1960-08-16
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Expires: 1975-05-04
Abstract
No abstract record available.
Inventors
- 👤 Clavier Alain Charles Andre
- 👤 Pouradier Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:39
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06; C08F226/00; C08F226/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
PROCESS FOR PREPARING AN AMPHOTERIC COPOLYMER WHICH COMPRISES MIXING TOGETHER UNSATURATED ACID HAVING THE FORMULA:
Claim 2
Dependent Claim
15 words
PROCESS FOR PREPARING AN AMPHOTERIC COPOLYMER WHICH COMPRISES MIXING TOGETHER UNSATURATED ACID HAVING THE FORMULA:
References Cited (Backward Citations)
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Cited
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US2662875A
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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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |