Patent US5695722A successfully refreshed from Google Patents.
US3134698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depolarized primary cell
Assignee: Dow Chemical Co
•
Filing: 1960-11-18
•
Granted: 1964-05-26
•
Expires: 1980-11-18
Abstract
No abstract record available.
Inventors
- 👤 Marshall P Neipert
- 👤 Richard E Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:43
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/46; H01M12/00; H01M12/04; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PRIMARY CELL CONSISTING OF A METAL ANODE COMPOSED OF AT LEAST ABOUT 85 PERCENT MAGNESIUM, AND ELECTRICALLY SEPARATED THEREFROM A DISTANCE OF BETWEEN ABOUT 0.05 AND 0.5 INCH, A POROUS CARBON CATHODE DEFINING AN ELECTROLYTIC CHAMBER THEREBETWEEN; AN ELECTROLYTE COMPRISING AN AQUEOUS SOLUTION OF MGBR2; A SUBSTANTIALLY IMPERVIOUS PLATE POSITIONED BETWEEN ABOUT 0.1 AND ABOUT 0.25 INCH EXTERIOR TO AND PARALLEL TO SAID CATHODE DEFINING A DISTRIBUTING CHAMBER BETWEEN THE CATHODE AND SAID PLATE; CONDUIT MEANS FOR ADMISSION OF ELECTROLYTE IN SAID DISTRIBUTING CHAMBER; AN OUTLET INTO THE UPPER PART OF SAID ELECTROLYTIC CHAMBER FOR ESCAPE OF GASES; AN OUTLET IN THE LOWER PART OF SAID ELECTROLYTIC CHAMBER FOR EGRESS OF ELECTROLYTE; A RECIRCULATING LINE LEADING FROM SAID OUTLET FOR SAID RECIRCULATING LINE; A MEANS FOR PROVIDING PRESSURE FOR RECIRCULATION OF SAID ELECTROLYTE; AND MEANS FOR INTRODUCING THE THUS BROMINATED ELECTROLYTE INTO SAID DISTRIBUTING CHAMBER.
Claim 2
Dependent Claim
146 words
A PRIMARY CELL CONSISTING OF A METAL ANODE COMPOSED OF AT LEAST ABOUT 85 PERCENT MAGNESIUM, AND ELECTRICALLY SEPARATED THEREFROM A DISTANCE OF BETWEEN ABOUT 0.05 AND 0.5 INCH, A POROUS CARBON CATHODE DEFINING AN ELECTROLYTIC CHAMBER THEREBETWEEN; AN ELECTROLYTE COMPRISING AN AQUEOUS SOLUTION OF MGBR2; A SUBSTANTIALLY IMPERVIOUS PLATE POSITIONED BETWEEN ABOUT 0.1 AND ABOUT 0.25 INCH EXTERIOR TO AND PARALLEL TO SAID CATHODE DEFINING A DISTRIBUTING CHAMBER BETWEEN THE CATHODE AND SAID PLATE; CONDUIT MEANS FOR ADMISSION OF ELECTROLYTE IN SAID DISTRIBUTING CHAMBER; AN OUTLET INTO THE UPPER PART OF SAID ELECTROLYTIC CHAMBER FOR ESCAPE OF GASES; AN OUTLET IN THE LOWER PART OF SAID ELECTROLYTIC CHAMBER FOR EGRESS OF ELECTROLYTE; A RECIRCULATING LINE LEADING FROM SAID OUTLET FOR SAID RECIRCULATING LINE; A MEANS FOR PROVIDING PRESSURE FOR RECIRCULATION OF SAID ELECTROLYTE; AND MEANS FOR INTRODUCING THE THUS BROMINATED ELECTROLYTE INTO SAID DISTRIBUTING CHAMBER.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |