US3696058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymer recovery
Assignee: EIDP Inc
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Filing: 1971-06-10
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Granted: 1972-10-03
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Expires: 1991-06-10
Abstract
Abstract A PROCESS FOR RECOVERING SOLID SCRAP THERMOPLASTIC POLYMER SUCH AS POLYAMIDES, POLYESTERS, POLYACRYLONITRILES AND POLYACETALS BY DISSOLVING THE POLYMER IN HEXAFLUOROISOPROPANOL, FILTERING THE POLYMER SOLUTION, MIXING THE POLYMER SOLUTION WITH AN EXCESS OF WATER AT 60* TO 100* C. AND SEPARATING THE PRECIPITATED POLYMER FROM THE AQUEOUS MIXTURE.
Inventors
- 👤 John Teti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:58
CPC Classifications
C; C08; C08J; C08J11/00; C08J11/04; C08J11/06; C08J11/08; C08J2333/00; C08J2333/18; C08J2333/20; C08J2367/00; C08J2367/02; C08J2377/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |