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Patent US2728749A successfully refreshed from Google Patents.
US2728749A
Expired / Lapsed
US
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Fluoroalkyl vinyl sulfonates and polymers thereof
Assignee: Eastman Kodak Co
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Filing: 1952-04-25
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Granted: 1955-12-27
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Expires: 1972-04-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Harry W Coover
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:47
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/63; C07C309/64; C07C309/67; C08; C08F; C08F28/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A FLUOROALKYL VINYL SULFONATE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
A FLUOROALKYL VINYL SULFONATE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2428755A
Cited
US2653973A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |