US3639334A
Expired / Lapsed
US
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Stabilization of polyphenylene ethers
Assignee: General Electric Co
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Filing: 1968-05-14
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Granted: 1972-02-01
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Expires: 1988-05-14
Abstract
Abstract A POLYPHENYLENE ETHER COMPOSITION STABLE TO OXYGEN CONTAINING ATOMOSPHERE AT ELEVATED TEMPERATURES COMPRISING A POLYPHENYLENE ETHER AND A STABILIZING QUANTITY OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF PHOSPHITES, HYDRAZINES, AND MIXTURES THEREOF.
Inventors
- 👤 Klaus E Holoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:38
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/24; C08K5/49; C08K5/51; C08K5/52; C08K5/524
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |