Patent US2976142A successfully refreshed from Google Patents.
US2976142A
Expired / Lapsed
US
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Aluminum alloy for high temperature service
Assignee: Howard Foundry Co
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Filing: 1957-12-27
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Granted: 1961-03-21
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Expires: 1977-12-27
Abstract
No abstract record available.
Inventors
- 👤 Charles F Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:18
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12; C22C21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
AN ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF FROM 4.5 TO 5.5% COPPER, FROM 2.25 TO 2.75% SILICON, FROM 0.2 TO 0.45% MAGNESIUM, FROM 0.35 TO 0.65% NICKEL, FROM 1.0 TO 1.5% CHROMIUM, FROM 0.15 TO 0.40% MOLYBEDEUM, FROM 0.15 TO 0.04% VANADIUM, AND THE BALANCE CONSISTING ESSENTIALLY OF ALUMINUM.
Claim 2
Dependent Claim
49 words
AN ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF FROM 4.5 TO 5.5% COPPER, FROM 2.25 TO 2.75% SILICON, FROM 0.2 TO 0.45% MAGNESIUM, FROM 0.35 TO 0.65% NICKEL, FROM 1.0 TO 1.5% CHROMIUM, FROM 0.15 TO 0.40% MOLYBEDEUM, FROM 0.15 TO 0.04% VANADIUM, AND THE BALANCE CONSISTING ESSENTIALLY OF ALUMINUM.
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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |