Patent US5077257A successfully refreshed from Google Patents.
US5077257A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion-coated metals
Assignee: Alloy Surfaces Co Inc
•
Filing: 1990-01-30
•
Granted: 1991-12-31
•
Expires: 2010-01-30
Abstract
Abstract Porous metal aluminide catalysts are formed by sintering together a mixture of aluminum powder with a powdered pyrophorically activatable metal in the proportion of about 11/2 to 3 atoms of aluminum for every atom of the activatable metal to cause the metal to interact and form a coherent mass, then leaching aluminum out of the mass to render it pyrophoric and then destroying that pyrophoricity.
Inventors
- 👤 Alfonso L. Baldi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:10
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/12; C06B45/14; B; B01; B01J; B01J25/00; B22; B22F; B22F7/00; B22F7/002; B22F9/00; B22F9/16; C23; C23C; C23C26/00; H; H05; H05K; H05K2201/00; H05K2201/02; H05K2201/0203; H05K2201/0206; H05K2201/0209; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
A porous metal aluminide catalyst formed by sintering together a mixture of aluminum powder with a powdered pyrophorically-activatable metal in the proportion of about 11/2 to 3 atoms of aluminum for every atom of the activatable metal, to cause the metals to inter-react and form a coherent mass, then leaching aluminum out of the mass to render it pyrophoric, and then destroying that pyrophoricity.
Claim 2
Dependent Claim
64 words
A porous metal aluminide catalyst formed by sintering together a mixture of aluminum powder with a powdered pyrophorically-activatable metal in the proportion of about 11/2 to 3 atoms of aluminum for every atom of the activatable metal, to cause the metals to inter-react and form a coherent mass, then leaching aluminum out of the mass to render it pyrophoric, and then destroying that pyrophoricity.
Claim 3
Dependent Claim
15 words
The combination of claim 1 in which the catalyst is formed on a carrier support.
Claim 4
Dependent Claim
13 words
The combination of claim 1 in which the metal aluminide is nickel aluminide.
Claim 5
Dependent Claim
13 words
The combination of claim 1 in which the metal aluminide is iron aluminide.
Claim 6
Dependent Claim
14 words
The combination of claim 1 in which the activatable metal is a denitration metal.
Claim 7
Dependent Claim
9 words
The product produced by the process of claim 1.
References Cited (Backward Citations)
US3425959A
Cited
SU762961A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |