US3607250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature alloys and articles
Assignee: Blaw Knox Co
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Filing: 1970-01-12
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Granted: 1971-09-21
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Expires: 1990-01-12
Abstract
Abstract A new high-temperature alloy having high creep resistance and improved load fracture properties at temperatures of 2,000* F. and above comprising about 0.35% to 0.75% carbon, at least about 0.2% manganese, up to about 2% silicon, about 40% to 55% nickel, about 22% to 33% chromium, about 4% to 6% tungsten, about 1% to 4.5% cobalt and the balance iron with usual impurities in ordinary amounts.
Inventors
- 👤 Ray H English
- 👤 Martin N Ornitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:33
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
The alloy as claimed in claim 1 wherein the carbon is 0.45%, manganese 1.25%, silicon 0.75%, nickel 48%, chromium 27%, tungsten 5%, cobalt 3% and the balance iron with ordinary impurities in usual amounts.
Claim 2
Dependent Claim
98 words
A refractory metal furnace part having high creep and load fracture properties cast from an alloy consisting of about 0.35% to 0.75% carbon, at least about 0.2% manganese, up to about 2% silicon, about 40% to 55% nickel, about 27% to 33% chromium, about 4% to 6% tungsten, about 2% to 4.5% cobalt and the balance iron with usual impurities in ordinary amounts and characterized by creep resistance, corrosion resistance and improved load fracture properties at operating temperatures in the range of 2, 000* F. in the as cast condition without heat treatment, age hardening and like treatments.
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) | 1974-09-20 | 1975-03-22 | 1975-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-20 | 1979-03-22 | 1979-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-20 | 1983-03-22 | 1983-09-21 | $7700.00 | Window Closed / Lapsed |