US3429750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing an improved platinum electrode
Assignee: Standard Oil Co
•
Filing: 1963-07-31
•
Granted: 1969-02-25
•
Expires: 1983-07-31
Abstract
No abstract record available.
Inventors
- 👤 Robert F Waters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/98; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR PREPARING AN IMPROVED PLATINUM ELECTRODE, SAID PROCESS COMPRISING: (1) IMPRENATING AN ELECTRICALLY CONDUCTING INERT SUPPORT WITH SALTS OF PLATINUM AND A SECOND METAL TO PRODUCE A CODISPERSION OF SAID SALTS, SAID SECOND METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT, MANGANESE, COPPER AND COMBINATIONS THEREOF, (2) DRYING SAID IMPREGNATED SUPPORT, (3) TREATING SAID SALTS AT A TEMPERATURE OF FROM 500*C. TO 1500*C. IN AN INERT ATMOSPHERE FOR A SUFFICIENT TIME TO PRODUCE AN INTIMATE MIXTURE COMPOSED OF SAID PLATINUM AND SAID SECOND METAL, AND (4) REMOVING A MAJOR AMOUNT OF SAID SECOND METAL TO PRODUCE AN INCREASED INTERNAL SURFACE AREA IN SAID ELECTRODE WITH EXPOSES INCREASED AMOUNTS OF SAID INTIMATE MIXTURE, SAID INTIMATE MIXTURE COMPRISING FROM ABOUT 2 TO ABOUT 300 ATOMIC PERCENT OF SAID SECOND METAL BASED ON SAID PLATINUM.
Claim 2
Dependent Claim
137 words
A PROCESS FOR PREPARING AN IMPROVED PLATINUM ELECTRODE, SAID PROCESS COMPRISING: (1) IMPRENATING AN ELECTRICALLY CONDUCTING INERT SUPPORT WITH SALTS OF PLATINUM AND A SECOND METAL TO PRODUCE A CODISPERSION OF SAID SALTS, SAID SECOND METAL BEING SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL, COBALT, MANGANESE, COPPER AND COMBINATIONS THEREOF, (2) DRYING SAID IMPREGNATED SUPPORT, (3) TREATING SAID SALTS AT A TEMPERATURE OF FROM 500*C. TO 1500*C. IN AN INERT ATMOSPHERE FOR A SUFFICIENT TIME TO PRODUCE AN INTIMATE MIXTURE COMPOSED OF SAID PLATINUM AND SAID SECOND METAL, AND (4) REMOVING A MAJOR AMOUNT OF SAID SECOND METAL TO PRODUCE AN INCREASED INTERNAL SURFACE AREA IN SAID ELECTRODE WITH EXPOSES INCREASED AMOUNTS OF SAID INTIMATE MIXTURE, SAID INTIMATE MIXTURE COMPRISING FROM ABOUT 2 TO ABOUT 300 ATOMIC PERCENT OF SAID SECOND METAL BASED ON SAID PLATINUM.
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |