US2697045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticized cellulose esters and ethers
Assignee: Sunoco Inc
•
Filing: 1950-12-01
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Granted: 1954-12-14
•
Expires: 1970-12-01
Abstract
No abstract record available.
Inventors
- 👤 Stanford J Hetzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:17
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A CELLULOSE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND ETHERS CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN IN THE MOLECULE, PLASTICIZED WITH A 1,5-PENTANEDIOL DIESTER OF A MONOCARBOXYLIC AROMATIC ACID HAVING LESS THAN 21 CARBON ATOMS.
Claim 2
Dependent Claim
38 words
A CELLULOSE DERIVATIVE SELECTED FROM THE GROUP CONSISTING OF CELLULOSE ESTERS AND ETHERS CONTAINING ONLY CARBON, HYDROGEN, AND OXYGEN IN THE MOLECULE, PLASTICIZED WITH A 1,5-PENTANEDIOL DIESTER OF A MONOCARBOXYLIC AROMATIC ACID HAVING LESS THAN 21 CARBON ATOMS.
References Cited (Backward Citations)
FR432264A
Cited
FR19685E
Cited
AT144030B
Cited
GB468533A
Cited
US2151476A
Cited
US2476976A
Cited
US2341464A
Cited
US2412469A
Cited
US2592234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |