Patent US2739137A successfully refreshed from Google Patents.
US2739137A
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Method for making polymeric hydrosols
Assignee: Eastman Kodak Co
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Filing: 1952-02-20
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Granted: 1956-03-20
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Expires: 1972-02-20
Abstract
No abstract record available.
Inventors
- 👤 Jr William F Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1804; C08F220/1802; C08F220/1808
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
42 words
A HYDROSOL WHICH RESULTS FROM THE EMULSION POLYMERIZATION OF AN AQUEOUS SYSTEM OF A MIXTURE OF METHACRYLAMIDE, N-BUTYL ACRYLATE AND STYRENE IN THE PROPORTIONS OF APPROXIMATELY 40 PARTS OF METHACRYLAMIDE, APPROXIMATELY 150 PARTS OF N-BUTYL ACRYLATE AND APPROXIMATELY 64 PARTS OF STYRENE.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |