Patent US2819979A successfully refreshed from Google Patents.
US2819979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizers for cellulosics
Assignee: Eastman Kodak Co
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Filing: 1956-02-17
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Granted: 1958-01-14
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Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Nelson G Baumer
- 👤 Harper James
- 👤 Gordon D Hiatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:21
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A CELLULOSE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF LOWER FATTY ACID ESTERS OF CELLULOSE AND LOWER ALKYL ETHERS OF CELLULOSE CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN IN THE MOLECULE PLASTICIZED WITH A POLYNITRILE SELECTED FROM THE CLASS CONSISTING OF COMPOSITIONS HAVING THE FOLLOWING FORMULA
Claim 2
Dependent Claim
45 words
A CELLULOSE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF LOWER FATTY ACID ESTERS OF CELLULOSE AND LOWER ALKYL ETHERS OF CELLULOSE CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN IN THE MOLECULE PLASTICIZED WITH A POLYNITRILE SELECTED FROM THE CLASS CONSISTING OF COMPOSITIONS HAVING THE FOLLOWING FORMULA
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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |