Patent US2542574A successfully refreshed from Google Patents.
← Back to Patent Explorer
US2542574A Expired / Lapsed US ⏱️ 0.0 years remaining

Alkaline dry cell

Assignee: Individual
•
Filing: 1946-06-05
•
Granted: 1951-02-20
•
Expires: 1966-06-05
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

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.

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

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag