US2956977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of 6-cyanonorcamphane-2(or 3)-carboxylic acid and resin plasticized therewith
Assignee: Eastman Kodak Co
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Filing: 1958-05-15
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Granted: 1960-10-18
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Expires: 1978-05-15
Abstract
No abstract record available.
Inventors
- 👤 John R Caldwell
- 👤 Jr Winston J Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A PLASTIC COMPOSITION COMPRISING A RESINOUS MATERIAL SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS OF FATTY ACIDS HAVING 2 TO 4 CARBON ATOMS, POLYVINYL CHLORIDE AND COPOLYMERS OF ACRYLONITRILE AND METHYLACRYLATE, AND A PLASTICIZER COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE COMPOUNDS HAVING THE FOLLOWING STRUCTURAL FORMULAS:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |