Patent US4256815A successfully refreshed from Google Patents.
US4256815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seals for electrochemical cells
Assignee: Edgewell Personal Care Brands LLC
•
Filing: 1980-01-21
•
Granted: 1981-03-17
•
Expires: 2000-01-21
Abstract
Abstract A sealed electrochemical cell having a secondary seal comprising a bead of a polyamide adhesive disposed on the top of the cell's gasket and extending into the cover-gasket and the container-gasket interfaces, thereby filling any crevices at those interfaces.
Inventors
- 👤 Nicholas J. Smilanich
- 👤 Samuel F. Reichert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:12
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/183; H01M50/186; H01M50/184; H01M50/19; H01M50/193; H01M50/197; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
92 words
A sealed electrochemical cell comprising a cathode material, an anodic material and an electrolyte housed in a container sealed at its open end by a closure means which comprises a cover and a nonconductive gasket at least partially coated with a polyamide-containing material, said coated gasket being disposed and compressed between the interface of the cover and the container; the improvement being a bead of a polyamide adhesive disposed on the top edge of the gasket and extending over to contact the edge of the container and the edge of the cover.
Claim 2
Dependent Claim
92 words
A sealed electrochemical cell comprising a cathode material, an anodic material and an electrolyte housed in a container sealed at its open end by a closure means which comprises a cover and a nonconductive gasket at least partially coated with a polyamide-containing material, said coated gasket being disposed and compressed between the interface of the cover and the container; the improvement being a bead of a polyamide adhesive disposed on the top edge of the gasket and extending over to contact the edge of the container and the edge of the cover.
Claim 3
Dependent Claim
21 words
The sealed electrochemical cell of claim 1 wherein the polyamide adhesive is a fatty polyamide having an amine number above 10.
Claim 4
Dependent Claim
17 words
The sealed electrochemical cell of claim 1 wherein the gasket is coated with a fatty polyamide-containing material.
Claim 5
Dependent Claim
29 words
The sealed electrochemical cell of claim 1, 2 or 3 wherein the gasket material is selected from the group consisting of nylon, polypropylene, ethylene-tetra-fluoroethylene copolymer and high density polyethylene.
Claim 6
Dependent Claim
22 words
The sealed electrochemical cell of claim 1, 2 or 3 wherein the electrolyte is an aqueous potassium hydroxide or sodium hydroxide solution.
Claim 7
Dependent Claim
39 words
The sealed electrochemical cell of claim 1, 2 or 3 wherein the electrolyte is an aqueous potassium hydroxide solution, the gasket is nylon coated with a fatty polyamide-containing material and the polyamide adhesive bead is a fatty polyamide-containing material.
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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |