US3738923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(ethylene/chlorotrifluoroethylene) and poly(ethylene/tetrafluoroethylene) having improved high temperature properties
Assignee: EIDP Inc
•
Filing: 1971-03-01
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Granted: 1973-06-12
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Expires: 1991-03-01
Abstract
Abstract THE SUBJECTING OF POLY(ETHYLENE/TETRAFLUOROETHYLENE) AND POLY (ETHYLENE/CHLOROTRIFLUOROETHYLENE) TO A MODERATE AMOUNT OF IONIZINGRADION HAS THE EFFECT OF IMPROVING THE TENSILE PROPERTIES, ESPECIALLY ULTIMATE ELONGATION, OF THE COPOLYMERS AT ELEVATED TEMPRATURES. THE AMOUNT OF RADIATION REQUIRED TO OBTAIN THIS IMPROVEMENT IS MINIMIZED BY FOLLOWING THE RADIATION TREATMENT WITH HEAT TREATMENT OF THE COPOLYMER.
Inventors
- 👤 D Carlson
- 👤 N West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:23
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/081
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |