US3341936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing electrodes
Assignee: Robert Bosch GmbH
•
Filing: 1963-08-26
•
Granted: 1967-09-19
•
Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 Sanstede Gerd
- 👤 Kohling Alfons
- 👤 Krupp Helmar
- 👤 Rabenhorst Helmut
- 👤 Richter Kurt
- 👤 Walter Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:04
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/98; B; B01; B01J; B01J23/00; B01J23/90; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A METHOD OF PRODUCING A POROUS ELECTRODE FOR ELECTROCHEMICL PROCESSES, SUCH AS AN ELECTRODE FOR AN ELECTROCHEMICAL FUEL CELL, COMPRISING THE STEPS OF PROVIDING AN ELECTRICALLY CONDUCTIVE, POROUS ELECTRODE BODY OF A POROSITY OF BETWEEN ABOUT 50% TO ABOUT 70%; AT LEAST PARTIALLY FILLING THE PORES OF SAID POROUS ELECTRICALLY CONDUCTIVE ELECTRODE BODY WITH AN ALLOY COMPRISING A NOBLER AND A LESS NOBLE METAL, SAID NOBLER METAL BEING ADAPTED TO ACT IN FINELY SUBDIVIDED FORM AS A CATALYST IN AN ELECTRODE FOR A FUEL CELL AND THE LIKE; AND DISSOLVING THE LESS NOBLE METAL OF SAID ALLOY SO AS TO RETAIN IN SAID PORES OF SAID ELECTRODE BODY ONLY SAID NOBLER METAL IN THE FORM OF A FINELY SUBDIVIDED CATALYTICALLY ACTIVE LAYER.
Claim 2
Independent Claim
122 words
A METHOD OF PRODUCING A POROUS ELECTRODE FOR ELECTROCHEMICL PROCESSES, SUCH AS AN ELECTRODE FOR AN ELECTROCHEMICAL FUEL CELL, COMPRISING THE STEPS OF PROVIDING AN ELECTRICALLY CONDUCTIVE, POROUS ELECTRODE BODY OF A POROSITY OF BETWEEN ABOUT 50% TO ABOUT 70%; AT LEAST PARTIALLY FILLING THE PORES OF SAID POROUS ELECTRICALLY CONDUCTIVE ELECTRODE BODY WITH AN ALLOY COMPRISING A NOBLER AND A LESS NOBLE METAL, SAID NOBLER METAL BEING ADAPTED TO ACT IN FINELY SUBDIVIDED FORM AS A CATALYST IN AN ELECTRODE FOR A FUEL CELL AND THE LIKE; AND DISSOLVING THE LESS NOBLE METAL OF SAID ALLOY SO AS TO RETAIN IN SAID PORES OF SAID ELECTRODE BODY ONLY SAID NOBLER METAL IN THE FORM OF A FINELY SUBDIVIDED CATALYTICALLY ACTIVE LAYER.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |