Patent US4165982A successfully refreshed from Google Patents.
US4165982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molybdenum base alloy having excellent high-temperature strength and a method of producing same
Assignee: Daido Steel Co Ltd
•
Filing: 1977-12-08
•
Granted: 1979-08-28
•
Expires: 1997-12-08
Abstract
Abstract A molybdenum base alloy containing a given amount of at least one of zirconium and hafnium, a given amount of carbon and not more than given amounts of oxygen and nitrogen has an excellent high-temperature strength. This alloy is produced by an electron beam melting process under high vacuum.
Inventors
- 👤 Fujiwara Tatsuo
- 👤 Koshi Katoh
- 👤 Yuzo Ohtakara
- 👤 Takayoshi Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:19
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
53 words
A molybdenum base alloy having a high-temperature strength, which consists of 0.005-0.015% by weight of C, at least one of 0.002-0.02% by weight of Zr and 0.004-0.04% by weight of Hf, not more than 0.0015% by weight of oxygen, not more than 0.0010% by weight of nitrogen and the remainder being substantially Mo.
Claim 2
Dependent Claim
53 words
A molybdenum base alloy having a high-temperature strength, which consists of 0.005-0.015% by weight of C, at least one of 0.002-0.02% by weight of Zr and 0.004-0.04% by weight of Hf, not more than 0.0015% by weight of oxygen, not more than 0.0010% by weight of nitrogen and the remainder being substantially Mo.
Claim 3
Dependent Claim
36 words
The alloy of claim 1 consisting of 0.010 wt % of carbon, less than 0.0005 wt % of oxygen, less than 0.005 wt % of nitrogen, 0.0067 wt % of zirconium, and the balance being molybdenum.
Claim 4
Dependent Claim
35 words
The alloy of claim 1 consisting of 0.006 wt % of carbon, less than 0.0005 wt % of oxygen, less than 0.0005 wt % of nitrogen, 0.0037 wt % zirconium, and the balance being molybdenum.
Claim 5
Dependent Claim
32 words
The alloy of claim 1 consisting of 0.007 wt % of carbon, 0.0009 wt % of oxygen, 0.0006 wt % of nitrogen, 0.027 wt % of hafnium, and the balance being molybdenum.
Claim 6
Dependent Claim
38 words
The alloy of claim 1 consisting of 0.009 wt % of carbon, 0.0011 wt % oxygen, less than 0.0005 wt % of nitrogen, 0.0043 wt % of zirconium, 0.010 wt % of hafnium, and the balance being molybdenum.
Claim 7
Dependent Claim
48 words
The alloy of claim 1 consisting of from 0.006 to 0.010 wt % of carbon, from 0.0037 to 0.0067 wt % of zirconium, from 0.0100 to 0.0280 wt % of hafnium, from 0.0005 to 0.0009 wt % of oxygen, and from 0.0005 to 0.0006 wt % of nitrogen.
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) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |