Patent US2542574A successfully refreshed from Google Patents.
US2542574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline dry cell
Assignee: Individual
•
Filing: 1946-06-05
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Granted: 1951-02-20
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Expires: 1966-06-05
Abstract
No abstract record available.
Inventors
- 👤 Ruben Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:42
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M4/00; H01M4/02; H01M4/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
AN ALKALI DRY CELL COMPRISING AN AMALGAMATED METAL CAN, A CORRUGATED AND PERFORATED AMALGAMATED ZINC ANODE OF HIGHER SURFACE AREA THAN THE INSIDE WALL OF SAID CAN LINING SAID INSIDE WALL AND HAVING ITS CORRUGATIONS IN PRESSURE CONTACT WITH SAID WALL AND FORMING A PERMANENT AMALGAM BOND THEREWITH, A CATHODE ROD CENTRALLY DISPOSED WITHIN SAID CAN, AT LEAST THE SURFACE OF SAID CATHODE COMPRISING A COHERENT CONDUCTIVE BODY CONTAINING AN ELECTROLYTICALLY REDUCTIBLE OXYGEN-YIELDING COMPOUND, AND AN AQUEOUS ALKALINE ELECTROLYTE GEL BETWEEN AND CONTACTING SAID ANODE AND CATHODE SURFACES AND SUBSTANTIALLY COMPLETELY EMBEDDING SAID ANODE, SAID ELECTROLYTE CONTAINING POTASSIUM HYDROXIDE AS THE ACTIVE INGREDIENT AND AN ALKALI METAL SALT OF CARBOXY-METHYL CELLULOSE AS THE GELLING AGENT, THE METAL OF SAID CAN BEING INERT TO THE ELECTROLYTE AND HAVING A LOW ELECTROLYTIC POTENTIAL WITH RESPECT TO ZINC.
Claim 2
Dependent Claim
135 words
AN ALKALI DRY CELL COMPRISING AN AMALGAMATED METAL CAN, A CORRUGATED AND PERFORATED AMALGAMATED ZINC ANODE OF HIGHER SURFACE AREA THAN THE INSIDE WALL OF SAID CAN LINING SAID INSIDE WALL AND HAVING ITS CORRUGATIONS IN PRESSURE CONTACT WITH SAID WALL AND FORMING A PERMANENT AMALGAM BOND THEREWITH, A CATHODE ROD CENTRALLY DISPOSED WITHIN SAID CAN, AT LEAST THE SURFACE OF SAID CATHODE COMPRISING A COHERENT CONDUCTIVE BODY CONTAINING AN ELECTROLYTICALLY REDUCTIBLE OXYGEN-YIELDING COMPOUND, AND AN AQUEOUS ALKALINE ELECTROLYTE GEL BETWEEN AND CONTACTING SAID ANODE AND CATHODE SURFACES AND SUBSTANTIALLY COMPLETELY EMBEDDING SAID ANODE, SAID ELECTROLYTE CONTAINING POTASSIUM HYDROXIDE AS THE ACTIVE INGREDIENT AND AN ALKALI METAL SALT OF CARBOXY-METHYL CELLULOSE AS THE GELLING AGENT, THE METAL OF SAID CAN BEING INERT TO THE ELECTROLYTE AND HAVING A LOW ELECTROLYTIC POTENTIAL WITH RESPECT TO ZINC.
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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 |