US2749239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum base alloy
Assignee: Alcoa Corp
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Filing: 1955-03-14
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Granted: 1956-06-05
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Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Walter E Sicha
- 👤 Harold Y Hunsicker
- 👤 Robert C Lemon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:12
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/12; C22C21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN ALUMINUM BASE ALLOY CASTING COMPOSED ESSENTIALLY OF ALUMINUM, 6 TO 18% COPPER, 4 TO 8% MAGNESIUM, 0.1 TO 2% MANGANESE AND 0.1 TO 2% NICKEL, THE AMOUNT OF COPPER NOT BEING LESS THAN THE AMOUNT OF MAGNESIUM, SAID ALLOY BEING CHARACTERIZED IN THE AS-CAST CONDITION BY A TENSILE STRENGTH AT 600* F. OF NOT LESS THAN 15,000 P.S.I.
Claim 2
Dependent Claim
59 words
AN ALUMINUM BASE ALLOY CASTING COMPOSED ESSENTIALLY OF ALUMINUM, 6 TO 18% COPPER, 4 TO 8% MAGNESIUM, 0.1 TO 2% MANGANESE AND 0.1 TO 2% NICKEL, THE AMOUNT OF COPPER NOT BEING LESS THAN THE AMOUNT OF MAGNESIUM, SAID ALLOY BEING CHARACTERIZED IN THE AS-CAST CONDITION BY A TENSILE STRENGTH AT 600* F. OF NOT LESS THAN 15,000 P.S.I.
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) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |