Patent US2570677A successfully refreshed from Google Patents.
US2570677A
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Battery separator
Assignee: Pritchett and Gold and EPS Co Ltd
•
Filing: 1948-07-30
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Granted: 1951-10-09
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Expires: 1968-07-30
Abstract
No abstract record available.
Inventors
- 👤 Honey Eric Maurice O'conor
- 👤 Hardy Charles Rupert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:44
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/463; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE SEPARATION OF THE PLATES OF ELECTRIC STORAGE BATTERIES, ENCLOSING EACH NEGATIVE PLATE IN AN ENVELOPE OF MICRO-POROUS MATERIAL WITH ONLY THE CURRENT CARRYING LUG PROJECTING, THE SAID ENVELOPE HAVING FLAT INTERNAL FACES TO PRESS AGAINST THE FLAT FACES OF THE PLATE AND PREVENT DISPLACEMENT OF ACTIVE MATERIAL THEREFROM BUT PROVIDING A CLEARANCE AT THE VERTICAL AND TOP EDGES OF THE PLATE AND AT THE LUG TO ALLOW OF GAS ESCAPE AROUND THE LUG DURING BATTERY CHARGING.
Claim 2
Dependent Claim
78 words
IN THE SEPARATION OF THE PLATES OF ELECTRIC STORAGE BATTERIES, ENCLOSING EACH NEGATIVE PLATE IN AN ENVELOPE OF MICRO-POROUS MATERIAL WITH ONLY THE CURRENT CARRYING LUG PROJECTING, THE SAID ENVELOPE HAVING FLAT INTERNAL FACES TO PRESS AGAINST THE FLAT FACES OF THE PLATE AND PREVENT DISPLACEMENT OF ACTIVE MATERIAL THEREFROM BUT PROVIDING A CLEARANCE AT THE VERTICAL AND TOP EDGES OF THE PLATE AND AT THE LUG TO ALLOW OF GAS ESCAPE AROUND THE LUG DURING BATTERY CHARGING.
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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) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |