US4053691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous light weight battery filler
Assignee: Duracell Inc USA
•
Filing: 1976-10-01
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Granted: 1977-10-11
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Expires: 1996-10-01
Abstract
Abstract A method for encasing electrochemical cells in a porous structure of pellets adhered to one another enabling individual cell venting, and a battery utilizing the porous structure.
Inventors
- 👤 Frank L. Ciliberti, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:18
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/394; H01M50/20; H01M50/233; H01M50/242; H01M50/289; H01M50/293; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A battery comprising an outer container, at least one electrochemical cell rigidly encapsulated within said container by a porous structure, said porous structure being comprised of a plurality of discrete pellets adhered to each other, said porous structure having a porosity of at least 20%.
Claim 2
Dependent Claim
45 words
A battery comprising an outer container, at least one electrochemical cell rigidly encapsulated within said container by a porous structure, said porous structure being comprised of a plurality of discrete pellets adhered to each other, said porous structure having a porosity of at least 20%.
Claim 3
Dependent Claim
22 words
The battery of claim 1 wherein said pellets are composed of a material having a compressive strength in excess of 2000 psi.
Claim 4
Dependent Claim
13 words
The battery of claim 1 wherein said pellets have a generally spherical configuration.
Claim 5
Dependent Claim
12 words
The battery of claim 1 wherein said pellets are comprised of polystyrene.
Claim 6
Dependent Claim
18 words
The battery as in claim 4 wherein said pellets have a diameter of about 1/8 of an inch.
References Cited (Backward Citations)
US3451850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |