US4253936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder
Assignee: Belgian Nuclear Research Centre
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Filing: 1980-03-13
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Granted: 1981-03-03
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Expires: 2000-03-13
Abstract
Abstract The method comprises the steps of preparing a solution of a binder in a solvent, wetting and grinding polyantimonic powder, forming a suspension with the wetted and ground powder and the solvent, mixing the suspension with the solution, pouring on a plate the so obtained viscous liquid, allowing the solvent to evaporate until a membrane in formation begins to dry, removing further the solvent by lixiviation, and removing the membrane from the plate.
Inventors
- 👤 Roger F. R. Leysen
- 👤 Philippe Vermeiren
- 👤 Leon H. J. M. Baetsle
- 👤 Gustaaf J. F. Spaepen
- 👤 Jan-Baptist H. Vandenborre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:48
CPC Classifications
C; C25; C25B; C25B13/00; C25B13/04; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/431; C25B1/00; C25B1/01; C25B1/02; C25B1/04; C25B1/34; C25B1/46; C25B13/05; C25B13/08; H01M8/00; H01M8/02; H01M8/0289; H01M2300/00; H01M2300/0002; H01M2300/0014; H01M50/489; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A method of preparing a membrane consisting of polyantimonic acid powder and an organic binder, comprising the steps of preparing a solution of the binder in a solvent, wetting the polyantimonic powder with the same solvent, grinding the wetted powder, forming a suspension with the wetted and ground powder and a same solvent, mixing the suspension with the solution, pouring on a plate the so obtained viscous liquid, allowing the solvent to evaporate until a membrane in process of formation begins to dry, removing further the solvent by lixiviation, and removing the membrane from the plate.
Claim 2
Independent Claim
96 words
A method of preparing a membrane consisting of polyantimonic acid powder and an organic binder, comprising the steps of preparing a solution of the binder in a solvent, wetting the polyantimonic powder with the same solvent, grinding the wetted powder, forming a suspension with the wetted and ground powder and a same solvent, mixing the suspension with the solution, pouring on a plate the so obtained viscous liquid, allowing the solvent to evaporate until a membrane in process of formation begins to dry, removing further the solvent by lixiviation, and removing the membrane from the plate.
Claim 3
Dependent Claim
11 words
The method of claim 1, in which the binder is polysulfone.
Claim 4
Dependent Claim
11 words
The method of claim 1, in which the solvent is methylpyrolidone.
References Cited (Backward Citations)
US3346422A
Cited
US3392103A
Cited
US3437580A
Cited
FR1417585A
Cited
US3463713A
Cited
US4024036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |