Patent US4733141A successfully refreshed from Google Patents.
Patent US2535360A successfully refreshed from Google Patents.
US2535360A
Expired / Lapsed
US
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Stabilized thermoplastic cellulose ether composition
Assignee: Hercules Powder Co
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Filing: 1948-09-25
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Granted: 1950-12-26
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Expires: 1968-09-25
Abstract
No abstract record available.
Inventors
- 👤 Koch William
- 👤 George H Pyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:30
CPC Classifications
C; C08; C08B; C08B11/00; C08B11/20; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A STABILIZED CELLULOSE ETHER COMPOSITION COMPRISING A THERMOPLASTIC CELLULOSE ETHER AND FROM ABOUT 0.5% TO ABOUT 5% OF DI-TERT-AMYLPHENOL HAVING THE TERTIARY AMYL GROUPS SUBSTITUTED IN THE ORTHO AND PARA POSITIONS RELATIVE TO THE HYDROXYL GROUP, SAID COMPOSITION BEING STABILIZED WITH RESPEC TO VISCOSITY AND COLOR DURING AND AFTER EXPOSURE TO HEAT, LIGHT, OXIDATION, AND WEATHERING BY VIRTUE OF THE PRESENCE THEREIN OF SAID DI-TERT-AMYLPHENOL.
Claim 2
Dependent Claim
65 words
A STABILIZED CELLULOSE ETHER COMPOSITION COMPRISING A THERMOPLASTIC CELLULOSE ETHER AND FROM ABOUT 0.5% TO ABOUT 5% OF DI-TERT-AMYLPHENOL HAVING THE TERTIARY AMYL GROUPS SUBSTITUTED IN THE ORTHO AND PARA POSITIONS RELATIVE TO THE HYDROXYL GROUP, SAID COMPOSITION BEING STABILIZED WITH RESPEC TO VISCOSITY AND COLOR DURING AND AFTER EXPOSURE TO HEAT, LIGHT, OXIDATION, AND WEATHERING BY VIRTUE OF THE PRESENCE THEREIN OF SAID DI-TERT-AMYLPHENOL.
References Cited (Backward Citations)
FR741975A
Cited
GB361341A
Cited
US2109593A
Cited
US2275716A
Cited
US2354745A
Cited
US2407209A
Cited
US2433008A
Cited
US2465915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |