US4430398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separator material for alkaline storage cells
Assignee: RCA Corp
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Filing: 1982-05-04
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Granted: 1984-02-07
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Expires: 2002-05-04
Abstract
Abstract A process for preparing separators for use in alkaline power cells for space vehicles is decribed. The separator is prepared by subjecting a sheet of fibrous polypropylene to corona discharge followed by impregnation with a compound selected from the group consisting of phenylglycine, parahydroxyphenylglycine and mixtures thereof.
Inventors
- 👤 Erich F. Kujas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:28
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/417; H01M50/44; H01M50/489; H01M50/491; C08J2323/00; C08J2323/02; C08J2323/10; C08J2323/12; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
48 words
A process of preparing a separator for an alkaline power cell comprising: (a) treating sheets of fibrous polypropylene to create surface porosity by passing them through a corona discharge; and (b) impregnating the sheets with a glycine selected from the group consisting of phenylglycine, parahydroxyphenylglycine and mixtures thereof.
Claim 2
Dependent Claim
48 words
A process of preparing a separator for an alkaline power cell comprising: (a) treating sheets of fibrous polypropylene to create surface porosity by passing them through a corona discharge; and (b) impregnating the sheets with a glycine selected from the group consisting of phenylglycine, parahydroxyphenylglycine and mixtures thereof.
Claim 3
Dependent Claim
41 words
A process in accordance with claim 1, wherein said sheets are impregnated by immersion into an aqueous solution of said substance, said process including the steps of compressing the sheets to remove excess solution and then drying to remove the solvent.
Claim 4
Dependent Claim
23 words
A process in accordance with claim 2, wherein said solution contains from about 25 to about 50 percent by weight of said glycine.
Claim 5
Dependent Claim
19 words
A process in accordance with claim 3, wherein said solution contains about 40 percent by weight of said glycine.
Claim 6
Dependent Claim
12 words
A process in accordance with claim 1, wherein said glycine is phenylglycine.
Claim 7
Dependent Claim
12 words
A process in accordance with claim 1, wherein said glycine is parahydroxyphenylglycine.
Claim 8
Dependent Claim
19 words
As an article of manufacture, a sheet of fibrous polypropylene treated in accordance with the process of claim 1.
Claim 9
Dependent Claim
25 words
An alkaline power cell containing at least one separator consisting of a sheet of fibrous polypropylene treated in accordance with the process of claim 1.
Claim 10
Dependent Claim
16 words
A power cell in accordance with claim 8, wherein said power cell is a nickel/cadmium cell.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |