US3841847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium alloys containing y{11 o{11 {11 and aluminium or silicon or both
Assignee: British Non Ferrous Metals Research Association
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Filing: 1972-09-15
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Granted: 1974-10-15
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Expires: 1992-09-15
Abstract
Abstract Alloys for use as components of gas turbine engines have the following composition: Chromium at least 70% Yttrium and/or Y2O30.01% to 18% Aluminum up to 5% Silicon up to 8% Aluminium + silicon at least 0.01% The average spacing between yttrium and/or Y2O3-containing particles is preferably not more than 5 microns.
Inventors
- 👤 R Jones
- 👤 A Hershman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:21
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; C22C1/00; C22C1/04; C22C1/05; C22C1/059
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
8 words
A CHROMIUM-BASED ALLOY CONSISTING OF (APART FROM IMPURITIES):
Claim 2
Dependent Claim
8 words
A CHROMIUM-BASED ALLOY CONSISTING OF (APART FROM IMPURITIES):
Claim 3
Dependent Claim
12 words
A chromium based alloy consisting of, apart from impurities; the following components
Claim 4
Dependent Claim
12 words
A chromium based alloy consisting of, apart from impurities; the following components
Claim 5
Dependent Claim
18 words
An alloy as claimed in claim 2 containing from 0.5 percent to 15 percent by volume of Y2O3.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |