Patent US2840469A successfully refreshed from Google Patents.
US2840469A
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Nickel-chromium-molybdenum alloy
Assignee: Rolls Royce PLC
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Filing: 1955-06-02
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Granted: 1958-06-24
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Expires: 1975-06-02
Abstract
No abstract record available.
Inventors
- 👤 Harold E Gresham
- 👤 Wheeler Marcus Alan
- 👤 Abbey Darley
- 👤 Bird Jack Raymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:34
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/005; C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/055
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
AN ALLOY HAVING A THERMAL SHOCK INDEX AT 950*C. OF AT LEAST ABOUT 60, AND AN HOURS TO FRACTURE CHARACTERISTIC UNDER STRESS OF 4480 LBS. PER SQ. INCH AT 1050*C. OF AT LEAST ABOUT 30 HOURS, SAID ALLOY CONSISTING ESSENTIALLY BY WEIGHT OF ABOUT 18 TO 25% CHROMIUM, ABOUT 8.5 TO 12% MOLYBDENUM, ABOUT 0.20 TO 0.85% CARBON, ABOUT 5 TO 15% COBALT, AND THE BALANCE NICKEL PLUS IMPURITIES.
References Cited (Backward Citations)
US2712498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |