US3882050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of depositing a noble metal on a surface of a nickel support
Assignee: Ethyl Corp
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Filing: 1973-07-24
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Granted: 1975-05-06
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Expires: 1993-07-24
Abstract
Abstract Nickel with a surface deposit of palladium is useful as an exhaust gas catalyst. Palladium may be deposited by contacting nickel with a solution of palladium ions. More than one deposition can be used. If a first deposition is followed by contacting the nickel with strong nitric acid, a second palladium deposition will result in an increased amount of palladium on the nickel surface.
Inventors
- 👤 Leonard R Niebylski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:57
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/9445; B01D53/945; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/892; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF DEPOSITING A NOBLE METAL ON A SURFACE OF A NICKEL SUPPORT, SAID METHOD COMPRISING CONTACTING SAID SURFACE OF SAID NICKEL SUPPORT WITH AN AQUEOUS SOLUTION OF A PALLADIUM SALT HAVING A PH LESS THAN 7 UNTIL PALLADIUM DEPOSITION ON SAID SURFACE HAS SUBSTANTIALLY CEASED; SUBSEQUENTLY CONTACTING THE SURFACE THEREBY PRODUCED WITH NITRIC ACID UNTIL SAID SURFACE IS ACTIVATED, AND THEREAFTER CONTACTING THE ACTIVATED SURFACE THEREBY RPODUCED WITH AN AQUEOUS SOLUTION OF PALLADIUM SALT, WHEREBY ADDITIONAL PALLADIUM IS DEPOSITED ON SAID SURFACE.
Claim 2
Independent Claim
84 words
A METHOD OF DEPOSITING A NOBLE METAL ON A SURFACE OF A NICKEL SUPPORT, SAID METHOD COMPRISING CONTACTING SAID SURFACE OF SAID NICKEL SUPPORT WITH AN AQUEOUS SOLUTION OF A PALLADIUM SALT HAVING A PH LESS THAN 7 UNTIL PALLADIUM DEPOSITION ON SAID SURFACE HAS SUBSTANTIALLY CEASED; SUBSEQUENTLY CONTACTING THE SURFACE THEREBY PRODUCED WITH NITRIC ACID UNTIL SAID SURFACE IS ACTIVATED, AND THEREAFTER CONTACTING THE ACTIVATED SURFACE THEREBY RPODUCED WITH AN AQUEOUS SOLUTION OF PALLADIUM SALT, WHEREBY ADDITIONAL PALLADIUM IS DEPOSITED ON SAID SURFACE.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |