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Patent US3269979A successfully refreshed from Google Patents.
US3269979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weathering resistant thermoplastic polyhydroxyether
Assignee: Union Carbide Corp
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Filing: 1962-12-04
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Granted: 1966-08-30
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Expires: 1982-12-04
Abstract
No abstract record available.
Inventors
- 👤 Robert H Snedeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THERMOPLASTIC POLYHYDROXYETHER COMPOSITION EXHIBITING IMPROVED RESISTANCE TO YELLOWING BY WEATHERING AND COMPRISING THERMOPLASTIC POLYHYDROXYETHER HAVING THE GENERAL FORMULA -(D-O-E-O)NWHEREIN D IS THE RADICAL RESIDUUM OF A DIHYDRIC PHENOL, E IS AN HYDROXY CONTAINING RADICAL RESIDUUM OF AN EPOXIDE, AND N REPRESENTS THE DEGREE OF POLYMERIZATION AND IS AT LEAST 30, AND A SMALL BUT EFFECTIVE AMOUNT, SUFFICIENT TO RETARD YELLOWING BY WEATHERING, OF THE COMBINATION OF A 2-HYDROXY-4-ALKOXYBENZOPHENONE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF CALCIUM ETHYLACETOACETATE ACETATE, PHENANTHRENE, DILAURYL THIODIPROPIONATE, DI-T-BUTYL-P-CRESOL, BIS(2-HYDROXY-3-T-BUTYL-5-ETHYLPHENYL)METHANE, TRIALKYL PHOSPHITES AND DIALKYL MONOARYL PHOSPHITES.
Claim 2
Dependent Claim
93 words
THERMOPLASTIC POLYHYDROXYETHER COMPOSITION EXHIBITING IMPROVED RESISTANCE TO YELLOWING BY WEATHERING AND COMPRISING THERMOPLASTIC POLYHYDROXYETHER HAVING THE GENERAL FORMULA -(D-O-E-O)NWHEREIN D IS THE RADICAL RESIDUUM OF A DIHYDRIC PHENOL, E IS AN HYDROXY CONTAINING RADICAL RESIDUUM OF AN EPOXIDE, AND N REPRESENTS THE DEGREE OF POLYMERIZATION AND IS AT LEAST 30, AND A SMALL BUT EFFECTIVE AMOUNT, SUFFICIENT TO RETARD YELLOWING BY WEATHERING, OF THE COMBINATION OF A 2-HYDROXY-4-ALKOXYBENZOPHENONE AND AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF CALCIUM ETHYLACETOACETATE ACETATE, PHENANTHRENE, DILAURYL THIODIPROPIONATE, DI-T-BUTYL-P-CRESOL, BIS(2-HYDROXY-3-T-BUTYL-5-ETHYLPHENYL)METHANE, TRIALKYL PHOSPHITES AND DIALKYL MONOARYL PHOSPHITES.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |