Patent US2542934A successfully refreshed from Google Patents.
US2542934A
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Dry cell construction
Assignee: Burgess Battery Co
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Filing: 1945-11-14
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Granted: 1951-02-20
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Expires: 1965-11-14
Abstract
No abstract record available.
Inventors
- 👤 Allison M Macfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:42
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
IN A DRY CELL OF THE LECLANCHE TYPE HAVING A CONTAINER AND A LIQUID ELECTROLYTE IN SAID CONTAINER, AN ABSORBENT ELEMENT IN SAID CONTANINER INITIALLY OUT OF CONTACT WITH SAID ELECTROYLTE AND IN THE PATH OF EXPANDING LIQUID IN SAID CONTAINER, SAID ABSORBENT ELEMENT BEING FROM THE GROUP CONSISTING OF ZINC OXIDE. HYDRATED LIME AND PLASTER OF PARIS.
Claim 2
Dependent Claim
58 words
IN A DRY CELL OF THE LECLANCHE TYPE HAVING A CONTAINER AND A LIQUID ELECTROLYTE IN SAID CONTAINER, AN ABSORBENT ELEMENT IN SAID CONTANINER INITIALLY OUT OF CONTACT WITH SAID ELECTROYLTE AND IN THE PATH OF EXPANDING LIQUID IN SAID CONTAINER, SAID ABSORBENT ELEMENT BEING FROM THE GROUP CONSISTING OF ZINC OXIDE. HYDRATED LIME AND PLASTER OF PARIS.
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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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |