US2499526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticized cellulose propionate
Assignee: Celanese Corp
•
Filing: 1946-11-09
•
Granted: 1950-03-07
•
Expires: 1966-11-09
Abstract
No abstract record available.
Inventors
- 👤 John H Prichard
- 👤 Leo S Birnbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:17
CPC Classifications
B; B32; B32B; B32B27/00; C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A THERMOPLASTIC COMPOSITION OF MATTER OF IMPROVED ELECTRICAL CHARACTERISTICS, COMPRISING CELLULOSE PROPIONATE CONTAINING FROM 0.0 TO ABOUT 0.3 FREE HYDROXYL GROUPS PER GLUCOSE UNIT AND HAVING INCORPORATED THEREWITH AS PLASTICIZER THEREFOR A NON-POLAR HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF MONO-AMYL NAPHTHALENE, DI-AMYL NAPHTHALENE AND A MIXTURE OF PARTIALLY HYDROGENATED ISOMERIC TERPHENYLS.
Claim 2
Dependent Claim
52 words
A THERMOPLASTIC COMPOSITION OF MATTER OF IMPROVED ELECTRICAL CHARACTERISTICS, COMPRISING CELLULOSE PROPIONATE CONTAINING FROM 0.0 TO ABOUT 0.3 FREE HYDROXYL GROUPS PER GLUCOSE UNIT AND HAVING INCORPORATED THEREWITH AS PLASTICIZER THEREFOR A NON-POLAR HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF MONO-AMYL NAPHTHALENE, DI-AMYL NAPHTHALENE AND A MIXTURE OF PARTIALLY HYDROGENATED ISOMERIC TERPHENYLS.
References Cited (Backward Citations)
US1309980A
Cited
GB428160A
Cited
US2205428A
Cited
US2261140A
Cited
US2388613A
Cited
US2387773A
Cited
US2387774A
Cited
US2410685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |