US3698055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant alloys of iron, cobalt and/or nickel and articles thereof
Assignee: Crucible Materials Corp
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Filing: 1970-12-28
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Granted: 1972-10-17
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Expires: 1990-12-28
Abstract
Abstract Alloys of iron, cobalt and/or nickel containing from 0.5 to 4.0% carbon and from 5 to 60% tungsten, molybdenum or mixtures thereof characterized by the absence of ''''reactive'''' elements such as Cr, V, Cb, Ta, Ti, Si, Mn and Al. which form hard-to-reduce oxides.
Inventors
- 👤 Frederick C Holtz Jr
- 👤 Hugh Morrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:02
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10S75/00; Y10S75/95; Y10S75/951
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
An alloy according to claim 1 suitable for use as a tool alloy, wherein said alloy has a hardness above Rc 56 and the ability to hold a cutting edge under high temperatures generated during metal cutting and to resist softening at temperatures of 1,000* F. and above.
Claim 2
Dependent Claim
41 words
An alloy according to claim 1 suitable for use as a structural material, wherein said alloy has a hardness below Rc 56 and the ability to withstand severe mechanical stress at elevated temperatures above 700* F. for prolonged periods of time.
Claim 3
Dependent Claim
18 words
An alloy in accordance with claim 1, in which the alloy contains about 0 - 90 percent cobalt.
Claim 4
Dependent Claim
18 words
An alloy in accordance with claim 1, in which the alloy contains about 0 - 90 percent nickel.
Claim 5
Dependent Claim
18 words
An alloy in accordance with claim 1, in which the alloy contains about 0 - 90 percent iron.
Claim 6
Dependent Claim
12 words
A fully dense, consolidated powder article of the alloy of claim 1.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |