US4248944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seals for electrochemical cells
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1979-12-21
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Granted: 1981-02-03
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Expires: 1999-12-21
Abstract
Abstract An improved seal for alkaline cells comprising a gasket, a thin film of parylene and a layer of a polyamide, an epoxy resin, asphalt or a cured epoxy-polyamide resin disposed and compressed between the interface of the cover and the container of the cell providing a fluid tight seal thereat.
Inventors
- 👤 Nicholas J. Smilanich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:43
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/183; H01M50/186; H01M50/184; H01M50/19; H01M50/193; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A sealed electrochemical cell comprising a cathodic material, an anodic material and an electrolyte housed in the container sealed at its open end by a closure means which comprises a cover, a nonconductive gasket and a layer selected from the group consisting of a polyamide, an epoxy resin, asphalt and a cured epoxypolyamide resin, said gasket and said layer disposed and compressed between the interface of the cover and the container; the improvement being a thin film of parylene disposed between the gasket and the layer interface thereby forming a fluid tight seal between the cover and the container of the cell.
Claim 2
Dependent Claim
102 words
A sealed electrochemical cell comprising a cathodic material, an anodic material and an electrolyte housed in the container sealed at its open end by a closure means which comprises a cover, a nonconductive gasket and a layer selected from the group consisting of a polyamide, an epoxy resin, asphalt and a cured epoxypolyamide resin, said gasket and said layer disposed and compressed between the interface of the cover and the container; the improvement being a thin film of parylene disposed between the gasket and the layer interface thereby forming a fluid tight seal between the cover and the container of the cell.
Claim 3
Dependent Claim
21 words
The sealed electrochemical cell of claim 1 wherein the parylene film is between about 0.0001 inch to about 0.0015 inch thick.
Claim 4
Dependent Claim
21 words
The sealed electrochemical cell of claim 1 wherein the parylene film is between about 0.0003 inch and about 0.001 inch thick.
Claim 5
Dependent Claim
29 words
The sealed electrochemical cell of claim 1 wherein the parylene film has the formula ##STR2## where x and y are H or Cl and n is greater than 5000.
Claim 6
Dependent Claim
48 words
The sealed electrochemical cell of claim 1, 2, 3 or 4 wherein the gasket is selected from the group consisting of nylon, polypropylene, ethylene-tetra-fluoro-ethylene copolymer and high density polyethylene, the layer is a polyamide layer, and the parylene is selected from the group consisting of polymonochloro-p-xylylene and polydichloro-p-xylylene.
Claim 7
Dependent Claim
31 words
The sealed electrochemical cell of claim 1 wherein the gasket is nylon, the layer is a fatty polyamide and the parylene film is between about 0.0003 and about 0.001 inch thick.
Claim 8
Dependent Claim
14 words
The sealed electrochemical cell of claim 1 or 6 wherein the parylene is polymonochloro-p-xylylene.
Claim 9
Dependent Claim
42 words
The sealed electrochemical cell of claim 1, 2, 3 or 4 wherein the electrolyte is an aqueous potassium hydroxide or sodium hydroxide solution, the layer is a polyamide and the film of parylene is between about 0.0003 and about 0.001 inch thick.
Claim 10
Dependent Claim
42 words
The sealed electrochemical cell of claim 1, 2 or 3 wherein the electrolyte is an aqueous potassium hydroxide solution, the gasket is nylon, the layer comprises a fatty polyamide and the parylene is selected from the group consisting of polymonochloro-p-xylylene and polydichloro-p-xylylene.
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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) | 1984-02-03 | 1984-08-04 | 1985-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-03 | 1988-08-04 | 1989-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-03 | 1992-08-04 | 1993-02-03 | $7700.00 | Window Closed / Lapsed |