Patent US3892591A successfully refreshed from Google Patents.
US3892591A
Expired / Lapsed
US
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Dry cell and manufacture of the same
Assignee: Maxell Ltd
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Filing: 1973-02-20
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Granted: 1975-07-01
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Expires: 1993-02-20
Abstract
Abstract A dry cell containing a separator which comprises a very fine paper having a thickness of at least about 10 microns and a density of about 0.65 to 0.85 g./cm3, said paper being coated with a paste material. Alternatively, the separator can comprise two layers of paper, a layer of said very fine paper and a layer of less fine paper, the latter having a density of about 0.45 to 0.55 g./cm3 and provided with a coating of paste material. In the dry cell, the separator is mounted parallel to the anode in such a manner that the side of said separator on which the paste is coated is placed together with said anode. The opposite side of said separator is in contact with the depolarizer.
Inventors
- 👤 Yoshio Uetani
- 👤 Rokurou Ikebata
- 👤 Kentaro Kashiwaya
- 👤 Syoetsu Sugihara
- 👤 Kaoru Hisatomi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:59
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/08; H01M50/00; H01M50/40; H01M50/409; H01M50/44; H01M50/449; H01M50/489
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
54 words
A DRY CELL CONTAINING A ZINC ANODE, A DEPOLARIZER AND A SEPARATOR DISPOSED THEREBETWEEN, SAID SEPARATOR BEING COMPOSED OF A BASE PAPER COMPRISING A LAYER OF VERY FINE PAPER HAVING A THICKNESS OF AT LEAST ABOUT 10 MICRONS AND A DENSITY OF ABOUT 0.65 TO 0.85 G/CM3, THE SIDE OF SAID BASE PAPER FACING
Claim 2
Dependent Claim
54 words
A DRY CELL CONTAINING A ZINC ANODE, A DEPOLARIZER AND A SEPARATOR DISPOSED THEREBETWEEN, SAID SEPARATOR BEING COMPOSED OF A BASE PAPER COMPRISING A LAYER OF VERY FINE PAPER HAVING A THICKNESS OF AT LEAST ABOUT 10 MICRONS AND A DENSITY OF ABOUT 0.65 TO 0.85 G/CM3, THE SIDE OF SAID BASE PAPER FACING
Claim 3
Dependent Claim
61 words
The dry cell according to claim 1, wherein the base paper comprises very fine paper having a thickness of at least 10 microns and a density of about 0.65 to 0.85 g./cm3 and coarse paper having a density of about 0.45 to 0.55 g./cm3, said very fine paper and said coarse paper in contact with each other and forming two layers.
Claim 4
Dependent Claim
22 words
The dry cell according to claim 1, wherein the paste material is used in an amount of about 10 to 50 g./m2.
Claim 5
Dependent Claim
29 words
The dry cell according to claim 2, wherein the paste material is coated on the surface of the base paper in an amount of about 10 to 50 g./cm2.
Claim 6
Dependent Claim
44 words
The dry cell according to claim 1, wherein the paste material coated on the surface of the base paper is at least one processed starch selected from the group consisting of esterified starch, etherified starch, cross-linked starch, esterified cross-linked starch and etherified cross-linked starch.
Claim 7
Dependent Claim
44 words
The dry cell according to claim 2, wherein the paste material coated on the surface of the base paper is at least one processed starch selected from the group consisting of esterfied starch, etherified starch, cross-linked starch, esterified cross-linked starch and etherified cross-linked starch.
Claim 8
Dependent Claim
53 words
The dry cell according to claim 1, wherein said paste material is coated on the base paper in an amount of about 10 to 50 g./m2, said paste material being at least one member selected from the group consisting of esterified starch, etherified starch, cross-linked starch, esterified cross-linked starch and etherified cross-linked starch.
Claim 9
Dependent Claim
53 words
The dry cell according to claim 2, wherein the coarser paper side of the two layers of the base paper is coated with about 10 to 50 g./m2 of at least one processed starch selected from the group consisting of esterified starch, etherified starch, cross-linked starch, esterified cross-linked starch and etherified cross-linked starch.
Claim 10
Dependent Claim
17 words
The dry cell according to claim 5, wherein the paste material is etherified starch cross-linked by epichlorohydrin.
Claim 11
Dependent Claim
14 words
The dry cell according to claim 8, wherein the paste material is esterified starch.
Claim 12
Dependent Claim
14 words
The dry cell according to claim 2, wherein the paste material is wheat starch.
Claim 13
Dependent Claim
43 words
The dry cell according to claim 1, wherein the depolarizer contains an electrolyte comprising zinc chloride in an amount of about 17 to 30 per cent by weight and ammonium chloride in an amount of not more than 10 per cent by weight.
Claim 14
Dependent Claim
43 words
The dry cell according to claim 2, wherein the depolarizer contains an electrolyte comprising zinc chloride in an amount of about 17 to 30 per cent by weight and ammonium chloride in an amount of not more than 10 per cent by weight.
Claim 15
Dependent Claim
83 words
The dry cell according to claim 1, wherein the paste material is used in an amount of 10 to 50 g./m2 and is at least one processed starch selected from the group consisting of esterified starch, etherified starch, cross-linked starch, esterified cross-linked starch and etherified cross-linked starch, and the depolarizer contains an electrolyte comprising zinc chloride in an amount of about 17 to 30 per cent by weight and ammonium chloride in an amount of not more than 10 per cent by weight.
Claim 16
Dependent Claim
85 words
The dry cell according to claim 2, wherein the paste material is used in an amount Of 10 to 50 g./m2 and is at least one processed starch selected from the group consisting of esterified starch, etherified starch, crossed linked starch, esterified cross-linked starch and etherified cross linked starch, and the depolarizer contains an electrolyte comprising zinc chloride in an amount of about 17 to 30 per cent by weight and ammonium chloride in an amount of not more than 10 per cent by weight.
Claim 17
Dependent Claim
47 words
A separator for use in a dry cell composed of a very fine paper having a thickness of at least about 10 microns and a density of about 0.65 to 0.85 g/cm3, only one side of said very fine paper being coated with a starchy paste material.
Claim 18
Dependent Claim
47 words
A separator for use in a dry cell composed of a very fine paper having a thickness of at least about 10 microns and a density of about 0.65 to 0.85 g/cm3, only one side of said very fine paper being coated with a starchy paste material.
Claim 19
Dependent Claim
77 words
A separator for use in a dry cell composed of a very fine paper having a thickness of at least about 10 microns and a density of about 0.65 to 0.85 g/cm3 and a coarse paper having a density of about 0.45 to 0.55 g/cm3, said very fine paper and said coarse paper being in contact with each other and forming two layers, only one side of said two layers being coated with a starchy paste material.
Claim 20
Dependent Claim
77 words
A separator for use in a dry cell composed of a very fine paper having a thickness of at least about 10 microns and a density of about 0.65 to 0.85 g/cm3 and a coarse paper having a density of about 0.45 to 0.55 g/cm3, said very fine paper and said coarse paper being in contact with each other and forming two layers, only one side of said two layers being coated with a starchy paste material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |