US2689799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose ester compositions plasticized with polyesters of dicarboxylic acids and alpha, omega-dihydroxyalkanes
Assignee: GAF Chemicals Corp
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Filing: 1951-11-16
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Granted: 1954-09-21
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Expires: 1971-11-16
Abstract
No abstract record available.
Inventors
- 👤 Charles P Albus
- 👤 Richard E Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
C; C08; C08L; C08L1/00; C08L1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A COMPOSITION OF MATTER COMPRISING AN ORGANIC CELLULOSE DERIVATIVE SELECTED FROM THE CLASS CONSISTING OF WATER-INSOLUBLE CELLULOSE ESTERS OF NITRIC ACID, LOWER ALKYL MONOCARBOXYLIC ACIDS, AND MIXED ESTERS THEREOF, AND WATER-INSOLUBLE CELLULOSE ETHERS OF BENZYL ALCOHOL AND OF LOWER ALKYL MONOHYDRIC ALCOHOLS CONTAINING, IN A PLASTICIZING AMOUNT, A POLYESTER OF AN ACID SELECTED FROM THE CLASS CONSISTING OF UNSUBSTITUTED ALIPHATIC DICARBOXYLIC ACIDS HAVING 4 TO 10 CARBON ATOMS AND UNSUBSTITUTED ISOCYCLIC DICARBOXYLIC ACIDS HAVING FROM 8 TO 10 CARBON ATOMS AND MIXTURES THEREOF WITH A DIHYDROXYALKANE SELECTED FROM THE CLASS CONSISTING OF 1,4-BUTANEDIOL AND 1,6-HEXANEDIOL, SAID POLYESTERS HAVING A MOLECULAR WEIGHT RANGING FROM 500 TO 3000.
Claim 2
Dependent Claim
106 words
A COMPOSITION OF MATTER COMPRISING AN ORGANIC CELLULOSE DERIVATIVE SELECTED FROM THE CLASS CONSISTING OF WATER-INSOLUBLE CELLULOSE ESTERS OF NITRIC ACID, LOWER ALKYL MONOCARBOXYLIC ACIDS, AND MIXED ESTERS THEREOF, AND WATER-INSOLUBLE CELLULOSE ETHERS OF BENZYL ALCOHOL AND OF LOWER ALKYL MONOHYDRIC ALCOHOLS CONTAINING, IN A PLASTICIZING AMOUNT, A POLYESTER OF AN ACID SELECTED FROM THE CLASS CONSISTING OF UNSUBSTITUTED ALIPHATIC DICARBOXYLIC ACIDS HAVING 4 TO 10 CARBON ATOMS AND UNSUBSTITUTED ISOCYCLIC DICARBOXYLIC ACIDS HAVING FROM 8 TO 10 CARBON ATOMS AND MIXTURES THEREOF WITH A DIHYDROXYALKANE SELECTED FROM THE CLASS CONSISTING OF 1,4-BUTANEDIOL AND 1,6-HEXANEDIOL, SAID POLYESTERS HAVING A MOLECULAR WEIGHT RANGING FROM 500 TO 3000.
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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |