US4150200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat battery with novel slurry form electrode
Assignee: Polaroid Corp
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Filing: 1974-12-16
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Granted: 1979-04-17
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Expires: 1994-12-16
Abstract
Abstract A planar primary battery particularly suited for photographic application characterized in exhibiting high current drain capacities and improved manufacturability. The battery structure incorporates at least one electrode present in aqueous slurry form as a particulate dispersion of active material and poly(2-acrylamido-2-methylpropanesulfonic acid) in combination with electrolyte.
Inventors
- 👤 Charles I. Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:04
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/42; H01M6/46; H01M6/48; H01M4/00; H01M4/02; H01M4/36
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
In a battery of a variety having a positive electrode, a negative electrode and an ion permeable separator located between said electrodes, the improvement wherein one said electrode comprises a dispersion of particulate active electrode material dispersed in fluid electrolyte and poly(2-acrylamido-2-methylpropanesulfonic acid).
Claim 2
Dependent Claim
43 words
In a battery of a variety having a positive electrode, a negative electrode and an ion permeable separator located between said electrodes, the improvement wherein one said electrode comprises a dispersion of particulate active electrode material dispersed in fluid electrolyte and poly(2-acrylamido-2-methylpropanesulfonic acid).
Claim 3
Dependent Claim
16 words
The improved battery of claim 1 wherein said active electrode material includes manganese dioxide and carbon.
Claim 4
Dependent Claim
15 words
The improved battery of claim 2 wherein said electrolyte includes ammonium chloride and zinc chloride.
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |