Patent US4256678A successfully refreshed from Google Patents.
Patent US3772223A successfully refreshed from Google Patents.
US3772223A
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US
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Process for the preparation of a porous plastics material and the product resulting therefrom
Assignee: Pennel et Flipo SAS
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Filing: 1972-04-14
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Granted: 1973-11-13
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Expires: 1992-04-14
Abstract
Abstract A PROCESS FOR PREPARING A POROUS PLASTIC MATERIAL COMPRISING MIXING A POLYMER SELECTED FROM THE POLYURETHANES, THE POLYAMIDES AND THE CONDENSATION PRODUCTS OF POLYAMIDES WITH EPOXY RESINS WITH FROM 50 TO 100%, BY WEIGHT OF THE POLYMER, OF A GEL RESULTING FROM THE ADMIXTURE OF A PETROLEUM OIL WITH FROM 10 TO 30%, BY WEIGHT OF THE PETROLEUM OIL, OF A METAL SALT OF AN ACID HAVING THE GENERAL FORMULA R (COOH) IN WHICH R IS A HYDROCARBON RADICAL CONTAINING AT LEAST 4 CARBON ATOMS, SHAPING THE RESULTING HETEROGENEOUS MIXTURE INTO THE DESIRED FORM AN REMOVING AT LEAST A PORTION OF THE GEL, WHICH PORTION COMPRISES SUBSTANTIALLY THE ENTIRE PETROLEUM OIL.
Inventors
- 👤 Broutelles R De
- 👤 L Duchene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/26
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |