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US3607409A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of forming calcium zincate powder and electrode

Assignee: Gates Energy Products Inc
•
Filing: 1967-06-28
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Granted: 1971-09-21
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Expires: 1987-06-28
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Abstract

Abstract A method of forming calcium zincate powder and an electrode from such powder comprises mixing together solutions of a soluble zinc salt and a soluble calcium salt, adding alkaline material to the mixed solution, and precipitating the calcium zincate. The liquid is decanted and the precipitate dried to provide a powder of calcium zincate with impurities of calcium hydroxide and zinc oxide. The powder contacted with a liquid, applied to a support or compacted under pressure to a particular configuration, and the powder is then dried to provide an electrode structure. Soluble zinc and calcium salts which may be employed in the method of the present invention include zinc acetate, zinc nitrate, zinc bromide, zinc chlorate, zinc perchlorate and zinc chloride, calcium acetate, calcium nitrate, calcium bromide, calcium chlorate, calcium perchlorate, calcium chloride, etc.

Inventors

  • 👤 Robert P Hamlen
  • 👤 John F Wilfore

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 21:20
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/24; H01M4/26; Y; Y02; Y02E; Y02E60/00; Y02E60/10

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 24 words
A method as in claim 1, wherein the soluble salts are selected from the class consisting of acetates, nitrates, bromides, chlorides, chlorates, and perchlorates.
Claim 2
Dependent Claim 17 words
A method as in claim 1, wherein the alkali metal hydroxide is a solution of potassium hydroxide.
Claim 3
Dependent Claim 17 words
A method as in claim 1, wherein the precipitate material is washed with water prior to drying.
Claim 4
Dependent Claim 40 words
A method of forming an electrode structure wherein powder made in accordance with the method of claim 1 is contacted with a liquid, compacted under pressure to a particular configuration, and the powder is dried thereby providing an electrode structure.
Claim 5
Dependent Claim 11 words
A method as in claim 5, wherein the liquid is water.
Claim 6
Dependent Claim 19 words
A method as in claim 5, wherein a metallic powder is added to the calcium zincate powder before compaction.
Claim 7
Dependent Claim 13 words
A method as in claim 7, wherein the metallic powder is zinc powder.
Claim 8
Dependent Claim 38 words
A method of forming an electrode structure wherein the powder made in accordance with the method of claim 1 is contacted with a liquid, applied to a support, and the powder is dried thereby providing an electrode structure.
Claim 9
Dependent Claim 11 words
A method as in claim 9, wherein the liquid is water.
Claim 10
Dependent Claim 19 words
A method as in claim 9, wherein a metallic powder is added to the calcium zincate powder before wetting.
Claim 11
Dependent Claim 12 words
A method as in claim 11, wherein the metallic powder is zinc.

References Cited (Backward Citations)

CA497968A Cited
US1854664A Cited
US1943334A Cited
US2865974A Cited
US3136647A Cited
US3226260A Cited
DE1196627B Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-09-20 1975-03-22 1975-09-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-09-20 1979-03-22 1979-09-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-09-20 1983-03-22 1983-09-21 $7700.00 Window Closed / Lapsed

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