US3753781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry cell having thin film seal
Assignee: Union Carbide Iran SA
•
Filing: 1972-04-04
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Granted: 1973-08-21
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Expires: 1992-04-04
Abstract
Abstract A method for packaging a dry cell in an outer metal jacket and a dry cell construction employing a thin film seal covering one terminal of the cell, the seal being locked between the metal jacket and an insulating sleeve surrounding the cell.
Inventors
- 👤 R Parker
- 👤 R Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:47
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/50; H01M50/572; H01M50/598; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
50 words
The dry cell construction of claim 1 wherein said electrode rod is capped with a metal contact and an insulating washer bridges the area between said metal contact and the lip of said metal jacket, said washer being locked between said insulating film and the lip of said insulating sleeve.
Claim 2
Dependent Claim
46 words
The dry cell construction of claim 1 including a metallic false bottom in contact with the end of said can opposite from which said electrode rod protrudes and locked by the crimp in said metal jacket and said insulating sleeve against the end of said can.
Claim 3
Dependent Claim
30 words
The dry cell construction of claim 1 wherein said insulating film seal is a thin, flexible, thermoplastic film having a length and width greater than the diameter of said cell.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |