US2840484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for plastifying cellulosederivatives
Assignee: Gevaert Photo Producten NV
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Filing: 1955-07-05
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Granted: 1958-06-24
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Expires: 1975-07-05
Abstract
No abstract record available.
Inventors
- 👤 Gerbaux Rene Camille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:09
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A COMPOSITION OF MATTER CONSISTING OF CELLULOSE ESTER OF A LOWER FATTY ACID AND FROM 5 TO 35% BY WEIGHT OF THE CELLULOSE ESTER OF AN N-SUBSTITUTED CARBAMATE OF THE FORMULA
Claim 2
Dependent Claim
31 words
A COMPOSITION OF MATTER CONSISTING OF CELLULOSE ESTER OF A LOWER FATTY ACID AND FROM 5 TO 35% BY WEIGHT OF THE CELLULOSE ESTER OF AN N-SUBSTITUTED CARBAMATE OF THE FORMULA
References Cited (Backward Citations)
US2041733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |