US2884387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous membrane materials and process for producing the same
Assignee: New York University
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Filing: 1956-10-02
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Granted: 1959-04-28
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Expires: 1976-10-02
Abstract
No abstract record available.
Inventors
- 👤 Harold H Bieber
- 👤 Paul F Bruins
- 👤 Gregor Harry Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:31
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/20; C08J5/22; C08J5/2206; C08J5/2275; B; B01; B01D; B01D69/00; B01D69/14; B01D69/141; B01D69/1411; C08J9/00; C08J9/28; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/42; H01M50/489; H01M50/491; C08J2201/00; C08J2201/04; C08J2201/054; C08J2201/0542; C08J2201/0544; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2333/00; C08J2333/18; C08J2333/20; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S521/00; Y10S521/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A MEMBRANACEOUS COMPOSITION THAT COMPRISES, A MICROPOROUS FILM-LIKE POLYMERIC MATRIX FORMED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYVINYL BUTYRAL, AND COPOLYMERS OF VINYL CHLORIDE WITH MONOMERS SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, VINYLIDENE CHLORIDE AND ACRYLONITRILE; SAID MATRIX HAVING A FINELY-DIVIDED SOLID HYDROPHILIC POLYMERIC MATERIAL, WHICH IS CHARACTERIZED BY THE ABILITY TO SWELL IN WATER AND AQUEOUS SOLUTIONS, UNIFORMLY DISPERSED THERETHROUGH AND FIRMLY HELD THEREIN, THE POLYMERIC MATRIX MATERIAL AND HYDROPHILIC POLYMERIC MATERIAL BEING PRESENT IN RESPECTIVE PROPORTIONS WITHIN THE RANGE OF FROM 1 TO 4 PARTS HYDROPHILIC MATERIAL TO EACH PART MATRIX MATERIAL.
Claim 2
Dependent Claim
101 words
A MEMBRANACEOUS COMPOSITION THAT COMPRISES, A MICROPOROUS FILM-LIKE POLYMERIC MATRIX FORMED OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYVINYL CHLORIDE, POLYVINYL BUTYRAL, AND COPOLYMERS OF VINYL CHLORIDE WITH MONOMERS SELECTED FROM THE GROUP CONSISTING OF VINYL ACETATE, VINYLIDENE CHLORIDE AND ACRYLONITRILE; SAID MATRIX HAVING A FINELY-DIVIDED SOLID HYDROPHILIC POLYMERIC MATERIAL, WHICH IS CHARACTERIZED BY THE ABILITY TO SWELL IN WATER AND AQUEOUS SOLUTIONS, UNIFORMLY DISPERSED THERETHROUGH AND FIRMLY HELD THEREIN, THE POLYMERIC MATRIX MATERIAL AND HYDROPHILIC POLYMERIC MATERIAL BEING PRESENT IN RESPECTIVE PROPORTIONS WITHIN THE RANGE OF FROM 1 TO 4 PARTS HYDROPHILIC MATERIAL TO EACH PART MATRIX MATERIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |