Patent US3574160A successfully refreshed from Google Patents.
US3574160A
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US
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Assignee: Wyeth Holdings LLC
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Filing: 1967-12-07
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Granted: 1971-04-06
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Expires: 1987-12-07
Abstract
Abstract COMPOSITIONS COMPRISING DIFFICULTY PROCESSABLE THERMOPLASTIC RESINS CONTAINING VARIOUS FURFURYL AND PICOLINE MATERIALS AS PROCESSING AIDS AND A PROCESS FOR THE PRODUCTION THEREOF ARE DISCLOSED. THESE RESINS ARE THE POLYIMIDES, THE POLYSULFONES, THE POLYPHENYLENE OXIDES, AND THE POLYCARBONATES.
Inventors
- 👤 Nelson Nae-Ching Hsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:11
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C08K5/3725; C08K5/04; C08K5/15; C08K5/151; C08K5/1535; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432
Claims Analysis
Total Claims: 0
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |