US5376480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline battery
Assignee: FDK Corp
•
Filing: 1993-11-16
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Granted: 1994-12-27
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Expires: 2013-11-16
Abstract
Abstract A gel form negative electrode of an alkaline battery is produced without mercury and enables uniform dispersion of zinc or zinc alloy powder and an effective metal which can be one or more of an oxide or hydroxide of indium, lead, gallium, bismuth. The zinc or zinc alloy powder and the effective metal are drymixed in advance of mixing with a gel form alkaline electrolyte. In order to obtain satisfactorily high vibration strength and impact resistance, fiber material can be added to the gel form negative electrode. The fiber material may be selected among rayon, vinylon, acryl, vinyon, polyamide, polypropylene, polyethylene, mercerized pulp, linter pulp.
Inventors
- 👤 Kenichi Shinoda
- 👤 Akihide Izumi
- 👤 Mitsuo Murakoshi
- 👤 Kiyohide Tsutsui
- 👤 Katsuhiro Yamashita
- 👤 Hidenori Tsuzuki
- 👤 Takashi Matsuo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:31
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12; H01M4/62; H01M2004/026; H01M2004/027
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
An alkaline battery comprising a positive electrode and a gel form negative electrode devoid of mercury, said negative electrode containing a zinc or zinc alloy powder and a fiber material mixed with an alkaline electrolyte.
Claim 2
Dependent Claim
35 words
An alkaline battery comprising a positive electrode and a gel form negative electrode devoid of mercury, said negative electrode containing a zinc or zinc alloy powder and a fiber material mixed with an alkaline electrolyte.
Claim 3
Dependent Claim
33 words
An alkaline battery as set forth in claim 1, wherein said fiber material is at least one fiber material selected from rayon, vinylon, acryl, vinyon, polyamide, polypropylene, polyethylene, mercerized pulp and linter pulp.
Claim 4
Dependent Claim
91 words
An alkaline battery as set forth in claim 1, which further comprises a positive container member, a negative terminal plate, a seal gasket clamped between said positive container member and said negative terminal plate, a negative collector extending through a center boss part of said seal gasket and fixed to said negative terminal plate by spot welding, and a seal cap fitted to said center boss part of said seal gasket from inner side opposite to said negative terminal plate, said negative collector and said seal cap being formed of brass.
Claim 5
Dependent Claim
24 words
An alkaline battery as set forth in claim 3, wherein said negative collector and said seal cap are formed of solder plated brass material.
Claim 6
Dependent Claim
73 words
An alkaline battery as set forth in claim 1, wherein said gel form negative electrode is formed by the steps of: preparing by dry mixing a dry mixture of one or more of an oxide of hydroxide of indium, lead, gallium and bismuth and a zinc or zinc alloy powder; putting said dry mixture into a gel form alkaline electrolyte; and mixing and dispersing said dry mixture in said gel form alkaline electrolyte.
Claim 7
Dependent Claim
84 words
An alkaline battery as set forth in claim 1, wherein said gel form negative electrolyte is formed by the steps of: preparing a gel form alkaline electrolyte by mixing a potassium hydroxide electrolyte and polyacrylic acid; preparing by dry mixing a dry mixture of a zinc or zinc alloy powder and indium oxide; putting said dry mixture into said gel form alkaline electrolyte; and stirring said gel form alkaline electrolyte with said dry mixture therein and thereby mixing and dispersing said dry mixture therein.
Claim 8
Dependent Claim
68 words
An alkaline battery as set forth in claim 1, wherein said gel form negative electrolyte is formed by the steps of: preparing by dry mixing a dry mixture of a zinc or zinc alloy powder, indium oxide and polyacrylic acid; putting said mixture into a potassium hydroxide electrolyte; and stirring said potassium hydroxide electrolyte with said dry mixture therein and thereby mixing and dispersing said dry mixture therein.
References Cited (Backward Citations)
JPS4877332A
Cited
JPS4887342A
Cited
US4084047A
Cited
US4292383A
Cited
US4500614A
Cited
JPS60177553A
Cited
JPS60236456A
Cited
JPS6459768A
Cited
JPS6459769A
Cited
JPH01105466A
Cited
JPH0410708A
Cited
US5168018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |