Patent US3399137A successfully refreshed from Google Patents.
US4746586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separators for alkaline dry batteries
Assignee: Kuraray Co Ltd
•
Filing: 1986-12-09
•
Granted: 1988-05-24
•
Expires: 2006-12-09
Abstract
Abstract The use of a paper containing synthetic fiber not greater than 0.8 denier, particularly a paper consisting of a polyvinyl alcohol fiber not greater than 0.8 denier and a cellulosic fiber, as a separator in an alkaline dry cell is conductive to improved alkali resistance, greater alkaline electrolyte absorption, and prevention of an internal short-circuit, resulting in a marked improvement in the discharge capacity of the dry battery.
Inventors
- 👤 Kazuo Mizutani
- 👤 Shoichi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:45
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/411; H01M50/429; H01M50/4295; H01M50/414; H01M50/449; H01M2300/00; H01M2300/0002; H01M2300/0014; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/249964; Y10T428/249965
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
56 words
A paper for alkaline dry battery separator, said paper comprising a polyvinyl alcohol fiber having a fineness of not greater than 0.8 denier and a cellulosic fiber having a fineness of not less than 1.0 denier, the weight ratio of said polyvinyl alcohol fiber and said cellulosic fiber being in the range of 15:85 through 85:15.
Claim 2
Dependent Claim
56 words
A paper for alkaline dry battery separator, said paper comprising a polyvinyl alcohol fiber having a fineness of not greater than 0.8 denier and a cellulosic fiber having a fineness of not less than 1.0 denier, the weight ratio of said polyvinyl alcohol fiber and said cellulosic fiber being in the range of 15:85 through 85:15.
Claim 3
Dependent Claim
54 words
A paper as defined in claim 1, wherein said paper is made of two wet-formed webs, one of which is made of a polyvinyl alcohol fiber having a fineness of not greater than 0.8 denier with the other web being made of a cellulosic fiber having a fineness of not less than 1.0 denier.
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) | 1991-05-24 | 1991-11-23 | 1992-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-24 | 1995-11-23 | 1996-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-24 | 1999-11-23 | 2000-05-24 | $7700.00 | Window Closed / Lapsed |