Patent US3309231A successfully refreshed from Google Patents.
US3309231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a fuel cell electrode
Assignee: Air Products and Chemicals Inc
•
Filing: 1962-04-05
•
Granted: 1967-03-14
•
Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Richard A Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:36
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
THE METHOD OF FORMING A FUEL CELL ELECTRODE WHICH COMPRISES THE STEPS OF: (A) IMPREGNATING A PROUS, ELECTRO-CONDUCTIVE, BAKED CARBON SUPPORT WITH AQUEOUS SOLUTIONS OF BOTH A PLATINUM COMPOUND AND A COMPOUND OF ANOTHER NOBLE METAL SELECTED AS A PROMOTER METAL GROUPS I-B AND VIII OF THE PERIODIC TABLE OF THE ELEMENTS, IN A RATIO OF APPROXIMATELY BETWEEN 1:2 AND 2:1 MOLOR, SAID PLATINUM AND PROMOTER METAL COMPOUNDS BEING SUPPLIED TO SAID SUPPORT IN SUCH AMOUNTS AS TO PROVIDE UP TO ABOUT 1.5 MILLIGRAMS OF EACH METAL PER SQUARE CENTIMETER OF THE CARBON SUPPORT, AND SAID IMPREGNATION CONTINUING FOR A PERIOD OF TIME SUFFICIENT TO EFFECT THE OPTIMUM DISTRIBUTION OF SAID COMPOUNDS THROUGHOUT THE PORES OF SAID SUPPORT; (B) DRYING SAID IMPREGNATED SUPPORT TO REMOVE THE WATER; (C) CHEMICALLY REDUCING SAID NOBLE METAL COMPOUNDS TO PRECIPITATE THE CORRESPONDING PURE METALS UPON THE OUTER SURFACE AND THROUGHOUT THE PORES OF SAID SUPPORT; (D) AND WASHING THE RESULTANT METAL-IMPREGNATED SUPPORT.
Claim 2
Independent Claim
158 words
THE METHOD OF FORMING A FUEL CELL ELECTRODE WHICH COMPRISES THE STEPS OF: (A) IMPREGNATING A PROUS, ELECTRO-CONDUCTIVE, BAKED CARBON SUPPORT WITH AQUEOUS SOLUTIONS OF BOTH A PLATINUM COMPOUND AND A COMPOUND OF ANOTHER NOBLE METAL SELECTED AS A PROMOTER METAL GROUPS I-B AND VIII OF THE PERIODIC TABLE OF THE ELEMENTS, IN A RATIO OF APPROXIMATELY BETWEEN 1:2 AND 2:1 MOLOR, SAID PLATINUM AND PROMOTER METAL COMPOUNDS BEING SUPPLIED TO SAID SUPPORT IN SUCH AMOUNTS AS TO PROVIDE UP TO ABOUT 1.5 MILLIGRAMS OF EACH METAL PER SQUARE CENTIMETER OF THE CARBON SUPPORT, AND SAID IMPREGNATION CONTINUING FOR A PERIOD OF TIME SUFFICIENT TO EFFECT THE OPTIMUM DISTRIBUTION OF SAID COMPOUNDS THROUGHOUT THE PORES OF SAID SUPPORT; (B) DRYING SAID IMPREGNATED SUPPORT TO REMOVE THE WATER; (C) CHEMICALLY REDUCING SAID NOBLE METAL COMPOUNDS TO PRECIPITATE THE CORRESPONDING PURE METALS UPON THE OUTER SURFACE AND THROUGHOUT THE PORES OF SAID SUPPORT; (D) AND WASHING THE RESULTANT METAL-IMPREGNATED SUPPORT.
References Cited (Backward Citations)
US1916249A
Cited
US2615932A
Cited
US2863762A
Cited
US3131223A
Cited
US3116165A
Cited
US3092517A
Cited
US3160530A
Cited
US3098762A
Cited
US3172074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |