US2903498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary dry cell
Assignee: VARTA Pertrix Union GmbH
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Filing: 1957-11-25
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Granted: 1959-09-08
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Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Sindel Johann
- 👤 Huber Richard
- 👤 Zottmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:59
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/04; H01M6/06; H01M6/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A PRIMARY DRY CELL, COMPRISING A SOLUBLE NEGATIVE ELECTRODE, A POSITIVE ELECTRODE, AN INNER ELECTROLYTE, AN OUTER ELECTROLYTE, A MOLDED POROUS DEPOLARIZER ELEMENT POSITIONED BETWEEN SAID NEGATIVE AND SAID POSITIVE ELECTRODES, ITS PORES BEING PARTLY FILLED WITH THE INNER ELECTROLYTE, AND A SEPARATOR LAYER POSITIONED BETWEEN, AND IN CONTACT WITH, SAID DEPOLARIZER ELEMENT AND SAID NEGATIVE ELECTRODE AND CARRYING THE OUTER ELECTROLYTE, THE INNER ELECTRODE FILLING NO MORE THAN ABOUT 75% OF THE VOLUME OF THE PORES OF THE DEPOLARIZER ELEMENT, THE SPECIFIC WEIGHT OF THE INNER ELECTROLYTE BEING AT LEAST 1.2 G/CC., THE OUTER ELECTROLYTE OF THE SEPARATOR LAYER CONTAINING AT LEAST ONE THICKENING AGENT SELECTED FROM THE GROUP CON-SISTING OF FLOUR AND STARCH AND AT LEAST ONE ADDITIVE CAPABLE OF INCREASING ITS INITIAL VISCOSITY, SAID ADDITIVE BEING SELECTED FROM THE GROUP CONSISTING OF A WATER SOLUBLE CELLULOSE ETHER, A WATER SOLUBLE CARBOXY ALKYL CELLULOSE, A VEGETABLE GUM, AND A WATER SOLUBLE POLYVINYL ALCHOL.
Claim 2
Dependent Claim
155 words
A PRIMARY DRY CELL, COMPRISING A SOLUBLE NEGATIVE ELECTRODE, A POSITIVE ELECTRODE, AN INNER ELECTROLYTE, AN OUTER ELECTROLYTE, A MOLDED POROUS DEPOLARIZER ELEMENT POSITIONED BETWEEN SAID NEGATIVE AND SAID POSITIVE ELECTRODES, ITS PORES BEING PARTLY FILLED WITH THE INNER ELECTROLYTE, AND A SEPARATOR LAYER POSITIONED BETWEEN, AND IN CONTACT WITH, SAID DEPOLARIZER ELEMENT AND SAID NEGATIVE ELECTRODE AND CARRYING THE OUTER ELECTROLYTE, THE INNER ELECTRODE FILLING NO MORE THAN ABOUT 75% OF THE VOLUME OF THE PORES OF THE DEPOLARIZER ELEMENT, THE SPECIFIC WEIGHT OF THE INNER ELECTROLYTE BEING AT LEAST 1.2 G/CC., THE OUTER ELECTROLYTE OF THE SEPARATOR LAYER CONTAINING AT LEAST ONE THICKENING AGENT SELECTED FROM THE GROUP CON-SISTING OF FLOUR AND STARCH AND AT LEAST ONE ADDITIVE CAPABLE OF INCREASING ITS INITIAL VISCOSITY, SAID ADDITIVE BEING SELECTED FROM THE GROUP CONSISTING OF A WATER SOLUBLE CELLULOSE ETHER, A WATER SOLUBLE CARBOXY ALKYL CELLULOSE, A VEGETABLE GUM, AND A WATER SOLUBLE POLYVINYL ALCHOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |