US2713079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery plate
Assignee: University of Michigan (System)
•
Filing: 1952-04-15
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Granted: 1955-07-12
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Expires: 1972-04-15
Abstract
No abstract record available.
Inventors
- 👤 Leo L Carrick
- 👤 John M Stapleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:15
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/73; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN ELECTRICAL SECONDARY BATTERIES, A THIN PLATE COMPRISING A GRID FORMED OF A LIGHTWEIGHT ELECTRICALLY CONDUCTIVE, FLEXIBLE, FLAT METAL PLATE HAVING A PLURALITY OF SMOOTH WALLED APERTURES FORMED THERETHROUGH, SAID PLATE BEING COMPLETELY COVERED WITH A COAT OF TIGHTLY ADHERENT, NON-POROUS LEAD, THE LEAD COVERING BEING COMPRESSED AGAINST THE FLAT FACES OF THE PLATE TO DENSIFY THE LEAD COAT AND FORM V-SHAPED GROOVES IN SAID COVERING IN THE AREAS WITHIN THE APERTURES, SAID V-SHAPED GROOVES PROVIDING A POSITIVE MECHANICAL LOCK FOR THE RETENTION OF ACTIVE MATERIAL WITHIN THE APERTURES.
Claim 2
Dependent Claim
89 words
IN ELECTRICAL SECONDARY BATTERIES, A THIN PLATE COMPRISING A GRID FORMED OF A LIGHTWEIGHT ELECTRICALLY CONDUCTIVE, FLEXIBLE, FLAT METAL PLATE HAVING A PLURALITY OF SMOOTH WALLED APERTURES FORMED THERETHROUGH, SAID PLATE BEING COMPLETELY COVERED WITH A COAT OF TIGHTLY ADHERENT, NON-POROUS LEAD, THE LEAD COVERING BEING COMPRESSED AGAINST THE FLAT FACES OF THE PLATE TO DENSIFY THE LEAD COAT AND FORM V-SHAPED GROOVES IN SAID COVERING IN THE AREAS WITHIN THE APERTURES, SAID V-SHAPED GROOVES PROVIDING A POSITIVE MECHANICAL LOCK FOR THE RETENTION OF ACTIVE MATERIAL WITHIN THE APERTURES.
References Cited (Backward Citations)
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Cited
US477914A
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US543055A
Cited
GB189621826A
Cited
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Cited
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-07-11 | 1959-01-10 | 1959-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-07-11 | 1963-01-10 | 1963-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-07-11 | 1967-01-10 | 1967-07-12 | $7700.00 | Window Closed / Lapsed |