Patent US4775551A successfully refreshed from Google Patents.
US4775551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous shaped articles
Assignee: Chloralp SAS
•
Filing: 1986-09-29
•
Granted: 1988-10-04
•
Expires: 2006-09-29
Abstract
Abstract Controlledly microporous shaped articles adopted for use, e.g., as electrodes and diaphragms, are produced by consolidating a fibrous matrix with a latex binder material, notably by deposition onto a rigid perforate substrate, the lattice network of said binder material comprising a silica-based derivative, e.g., a precipitated or pyrogenic silica.
Inventors
- 👤 Jean Bachot
- 👤 Jean-Claude Kiefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:58
CPC Classifications
C; C25; C25B; C25B13/00; C25B13/04; C04; C04B; C04B38/00; C04B38/04; C25B13/05; C25B13/08; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/426; H01M50/431; H01M50/434; H01M50/44; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
66 words
A process for the production of a microporous shaped article, which comprises consolidating a fibrous matrix with a latex binder material comprising fluoropolymer particulates, and a silica-based derivative comprising precipitated or pyrogenic silica having a BET specific surface area from 100 m 2 /g to 300 m 2 /g and a particle size from 1 to 50 micrometers for developing the lattice of said latex binder.
Claim 2
Dependent Claim
66 words
A process for the production of a microporous shaped article, which comprises consolidating a fibrous matrix with a latex binder material comprising fluoropolymer particulates, and a silica-based derivative comprising precipitated or pyrogenic silica having a BET specific surface area from 100 m 2 /g to 300 m 2 /g and a particle size from 1 to 50 micrometers for developing the lattice of said latex binder.
Claim 3
Dependent Claim
19 words
The process as defined by claim 1, the silica having a particle size of from 1 to 15 micrometers.
Claim 4
Dependent Claim
31 words
The process as defined by claim 1, said latex binder comprising from 30 to 70% of fluoropolymer solid particulates, the particle size distribution of which ranges from 0.1 to 5 micrometers.
Claim 5
Dependent Claim
14 words
The process as defined by claim 1, said fibrous matrix comprising electrically conductive fibers.
Claim 6
Dependent Claim
14 words
The process as defined by claim 1, said fibrous matrix comprising electrically nonconductive fibers.
Claim 7
Dependent Claim
15 words
The process as defined by claim 4, said electrically conductive fibers comprising monodisperse carbon fibers.
Claim 8
Dependent Claim
23 words
The process as defined by claim 1, comprising developing microporosity in said consolidated shaped article by digesting the precipitated or pyrogenic silica therefrom.
Claim 9
Dependent Claim
28 words
The process as defined by claim 7, wherein said shaped article is consolidated by depositing said fibrous matrix and latex binder material therefor onto a rigid perforate substrate.
Claim 10
Dependent Claim
21 words
The process as defined by claiim 8, comprising filtering said fibrous matrix and latex binder material through said rigid perforate substrate.
Claim 11
Dependent Claim
21 words
The process as defined by claiim 8, comprising filtering said fibrous matrix and latex binder material through said rigid perforate substrate.
Claim 12
Dependent Claim
18 words
The process as defined in claim 1, comprising consolidating said fibrous matrix with an unrecycled latex binder material.
Claim 13
Dependent Claim
58 words
A process for the production of a microporous shaped article, which comprises consolidating a matrix of electrically conductive fibers with a latex fluoropolymer binder material and a precipitated or pyrogenic silica having a BET specific surface area of from 100 m 2 /g to 300 m 2 /g and a particle size of from 1 to 50 micrometers.
Claim 14
Dependent Claim
58 words
A process for the production of a microporous shaped article, which comprises consolidating a matrix of electrically conductive fibers with a latex fluoropolymer binder material and a precipitated or pyrogenic silica having a BET specific surface area of from 100 m 2 /g to 300 m 2 /g and a particle size of from 1 to 50 micrometers.
References Cited (Backward Citations)
US3940536A
Cited
US3980613A
Cited
US4204938A
Cited
US4135996A
Cited
US4337117A
Cited
US4337117B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |