US4172184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminar batteries
Assignee: Polaroid Corp
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Filing: 1978-09-05
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Granted: 1979-10-23
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Expires: 1998-09-05
Abstract
Abstract A stable high capacity battery employs a lead foil having cadmium plated on at least one side thereof to a thickness of about 0.1 to 3 mils as the anode.
Inventors
- 👤 Stanley M. Bloom
- 👤 Arnold Hoffman
- 👤 Kenneth S. Norland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:30
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/12; H01M6/00; H01M6/04; H01M6/06; H01M6/12
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
30 words
A thin, substantially pinhole free cadmium battery anode comprising a lead foil having cadmium plated on at least one side thereof to a thickness of about 0.1 to 3 mils.
Claim 2
Dependent Claim
30 words
A thin, substantially pinhole free cadmium battery anode comprising a lead foil having cadmium plated on at least one side thereof to a thickness of about 0.1 to 3 mils.
Claim 3
Dependent Claim
16 words
The electrode of claim 1 wherein said foil has a thickness of 0.3 to 1 mils.
Claim 4
Dependent Claim
23 words
The foil of claim 2 wherein said foil has a thickness of 3.0-10 mils and said cadmium has a thickness of 0.1-3 mils.
Claim 5
Dependent Claim
23 words
The electrode of claim 1 wherein said cadmium is plated on both sides of the lead foil, each cadmium layer having said thickness.
Claim 6
Dependent Claim
15 words
A primary battery cell comprising the anode of claim 1, a cathode and an electrolyte.
Claim 7
Dependent Claim
14 words
The battery cell of claim 5 wherein said cathode is a dry patch cathode.
Claim 8
Dependent Claim
115 words
The battery cell of claim 5 wherein said cathode is a planar cathode current carrying on one surface thereof in order, a first cathode stratum and a second cathode stratum, said first cathode stratum being of the dry patch cathode type and comprising a particular dispersion of cathode active particles in a binder matrix, said binder matrix being insoluble in and permeable to an aqueous electrolyte and bonded to said cathode collector, said second cathode stratum being substantially coextensive with said first cathode stratum and comprising a slurry of said cathode active particles dispersed and comprising a slurry of said cathode active particles dispersed in an aqueous electrolyte and adhered to said first cathode stratum.
Claim 9
Dependent Claim
20 words
The battery cell of claim 7 having a planar electrolyte ion permeable separator positioned between said anode and said cathode.
Claim 10
Dependent Claim
12 words
The battery cell of claim 5 wherein said electrolyte comprises cadmium chloride.
Claim 11
Dependent Claim
14 words
A battery comprising a plurality of the battery cells of claim 5 electrically interconnected.
Claim 12
Dependent Claim
9 words
A flat laminar battery in accordance with claim 10.
Claim 13
Dependent Claim
24 words
The flat laminar battery of claim 11 having a planar electrolyte ion permeable separator positioned between the anode and the cathode of each cell.
Claim 14
Dependent Claim
54 words
A laminar electrical cell comprising a cadmium anode consisting of lead foil plated on at least one side with cadmium, a cathode comprising a slurry of manganese dioxide and carbon in an aqueous electrolyte, and an electrolyte permeable separator between a cadmium plated surface of said foil confronting said separator and said slurry cathode.
Claim 15
Dependent Claim
54 words
A laminar electrical cell comprising a cadmium anode consisting of lead foil plated on at least one side with cadmium, a cathode comprising a slurry of manganese dioxide and carbon in an aqueous electrolyte, and an electrolyte permeable separator between a cadmium plated surface of said foil confronting said separator and said slurry cathode.
Claim 16
Dependent Claim
15 words
The cell of claim 13, in which said aqueous electrolyte comprises cadmium chloride in water.
Claim 17
Dependent Claim
16 words
The cell of claim 13, in which said aqueous electrolyte comprises ammonium chloride and cadmium chloride.
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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |