Patent DE546536C successfully refreshed from Google Patents.
Patent US2744025A successfully refreshed from Google Patents.
US2744025A
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Cellulose ester compositions plasticized with polyesters of suberic acid
Assignee: GAF Chemicals Corp
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Filing: 1951-11-16
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Granted: 1956-05-01
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Expires: 1971-11-16
Abstract
No abstract record available.
Inventors
- 👤 Charles P Albus
- 👤 Donald E Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08; C08L1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A COMPOSITON OF MATTER CONSISTING ESSENTIALLY OF A WATER-INSOLUBLE LOWER ALIPHATIC ESTER OF CELLULOSE CONTAINING, IN A PLASTICIZING AMOUNT, A POLYESTER OF SUBERIC ACID WITH AN ETHER GLYCOL SELECTED FROM THE GROUP CONSISTING OF DIETHYLENE GLYCOL, TRIETHYLENE GLYCOL, AND DIPROPYLENE GLYCOL, SAID POLYESTER BEING A LIQUID AND HAVING A MOLECULAR WEIGHT RANGING FROM 590 TO 1100.
Claim 2
Dependent Claim
56 words
A COMPOSITON OF MATTER CONSISTING ESSENTIALLY OF A WATER-INSOLUBLE LOWER ALIPHATIC ESTER OF CELLULOSE CONTAINING, IN A PLASTICIZING AMOUNT, A POLYESTER OF SUBERIC ACID WITH AN ETHER GLYCOL SELECTED FROM THE GROUP CONSISTING OF DIETHYLENE GLYCOL, TRIETHYLENE GLYCOL, AND DIPROPYLENE GLYCOL, SAID POLYESTER BEING A LIQUID AND HAVING A MOLECULAR WEIGHT RANGING FROM 590 TO 1100.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |