US3743548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersion hardened metals having improved oxidation characteristics at elevated temperature
Assignee: Cabot Corp
•
Filing: 1971-05-06
•
Granted: 1973-07-03
•
Expires: 1991-05-06
Abstract
Abstract Dispersion hardened metals based on nickel and containing from 8-35 percent of chromium (refractory oxides, such as thoria, are pervasively dispersed in the metal to harden the same) are modified by the inclusion of from about 2.5 to about 5 percent of aluminum in order to provide improved oxidation resistance at elevated temperature while subjected to high velocity gases.
Inventors
- 👤 S Baranow
- 👤 L Klingler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:16
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; C22C1/00; C22C1/04; C22C1/05; C22C1/059; Y; Y10; Y10S; Y10S75/00; Y10S75/95; Y10S75/951; Y10S75/956
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
39 words
A dispersion hardened metal as recited in claim 1 in which said refractory metal oxide is dispersed in an amount of from 0.1 to 6 percent by volume and has an average particle size less than about 200 millimicrons.
Claim 2
Dependent Claim
17 words
A dispersion hardened metal as recited in claim 1 in which said refractory metal oxide is thoria.
Claim 3
Dependent Claim
23 words
A dispersion hardened metal as recited in claim 1 in which said aluminum is present in an amount of at least 3 percent.
Claim 4
Dependent Claim
22 words
A dispersion hardened metal as recited in claim 4 in which said chromium is present in an amount of from 10-30 percent.
Claim 5
Dependent Claim
20 words
A dispersion hardened metal as recited in claim 1 in which said metal is in the form of a sheet.
Claim 6
Dependent Claim
19 words
A dispersion hardened metal as recited in claim 1 in which said metal has a single phase alloy matrix.
Claim 7
Dependent Claim
30 words
A dispersion hardened metal as recited in claim 1 in which said metal includes from 0 - 1.0 percent of yttrium, lanthanum, hafnium or rare earths of atomic numbers 58-71.
Claim 8
Dependent Claim
20 words
A dispersion hardened metal as recited in claim 1 in which said metal includes up to 15 percent of iron.
References Cited (Backward Citations)
US3595710A
Cited
US3556769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |