US3287168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel cell electrode and preparation thereof
Assignee: Union Oil Company of California
•
Filing: 1962-09-19
•
Granted: 1966-11-22
•
Expires: 1982-09-19
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:46
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8825; H01M4/8853; H01M4/8803; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
AN ELECTRODE PRODUCED BY PASSING A DIRECT ELECTRIC CURRENT TO A NOBLE METAL SUPPORT THROUGH AN AQUEOUS PLATINUM PLATING SOLUTION CONSISTING ESSENTIALLY OF HYDROCHLORIC ACID, PLATINIC CHLORIDE, AND LEAD IONS IN AN AMOUNT OF ABOUT 0.06-0.07 TIMES THE CONCENTRATION OF PLATINIC CHLORIDE, SAID LEAD IONS RESULTING FROM THE PRESENCE IN SAID SOLUTION OF A SOLUBLE LEAD COMPOUND, SAID ELECTRIC CURRENT BEING MAINTAINED AT A CURRENT DENSITY BETWEEN ABOUT 50-125 MILLIAMPERES PER SQUARE CENTIMETER OF SAID SUPPORT, AND THE TEMPERATURE OF SAID PLATING SOLUTION BEING MAINTAINED SUFFICIENTLY HIGH TO INSURE SOLUBILITY OF SAID LEAD COMPOUND.
Claim 2
Dependent Claim
49 words
IN A FUEL CELL COMPRISING AN ELECTROLYTE CONTAINING A REDUCTANT AND TWO ELECTRODES DISPOSED THEREIN IN SPACED RELATIONSHIP, AND MEANS FOR INTRODUCING A FREE OXYGENCONTAINING GAS IN SAID ELECTROLYTE IN EFFECTIVE PROXIMITY TO ONE OF SAID ELECTRODES, THE IMPROVEMENT WHEREIN THE SECOND ELECTRODE IS THE ELECTRODE OF CLAIM 8.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |