Patent US2940956A successfully refreshed from Google Patents.
US2940956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nu-cyanoacetyl-nu'-acrylyl and methacrylyl hydrazines, and polymers thereof
Assignee: Eastman Kodak Co
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Filing: 1957-11-07
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Granted: 1960-06-14
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:44
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
11 words
A POLYMER OF A HYDRAZIDE REPRESENTED BY THE FOLLOWING GENERAL FORMULA:
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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |