US3787244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of catalyzing porous electrodes by replacement plating
Assignee: RTX Corp
•
Filing: 1970-02-02
•
Granted: 1974-01-22
•
Expires: 1990-02-02
Abstract
Abstract A porous or sintered fuel cell electrode which is catalyzed by means of a replacement plating process. An acidic plating solution containing a salt of a noble metal catalyst is forced through the pores of a nickel electrode substrate and the noble metal ions from the dissolved salt replace a thin layer of the nickel surface within the pores.
Inventors
- 👤 L Schulmeister
- 👤 R Nickols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:54
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/86; H01M4/8605; H01M4/8621; H01M4/88; H01M4/8825; H01M4/8853; H01M4/90; H01M4/92; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
The method of claim 1 wherein the noble metal catalyst salt is selected from the group consisting of chlorides of platinum, palladium and gold.
Claim 2
Dependent Claim
18 words
The method of claim 2 wherein the plating solution contains salts of more than one noble metal catalyst.
References Cited (Backward Citations)
US2409295A
Cited
US3116165A
Cited
GB988174A
Cited
US3097974A
Cited
US3167457A
Cited
US3409472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |