US2742688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex aluminous products and articles
Assignee: Alcoa Corp
•
Filing: 1952-06-18
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Granted: 1956-04-24
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Expires: 1972-06-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Joseph A Nock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:17
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/016; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10S428/9335; Y10S428/937; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A DUPLEX ALUMINOUS PRODUCT IN THE SOLUTION HEAT TREATED AND ARTIFICIALLY AGED CONDITION COMPOSED OF A SUBSTANTIALLY NICKEL-FREE ALUMINUM BASE ALLOY CORE MEMBER CONTAINING AS THE ESSENTIAL ADDED ELEMENTS FROM ABOUT 1.9 TO 4.5 PER CENT COPPER, FROM ABOUT 6 TO 9 PER CENT ZINC, THE RATIO OF COPPER TO ZINC BEING WITHIN THE RANGE .2 TO .7, AND FROM ABOUT 1 TO 3.5 PER CENT MAGNESIUM, BALANCE PRINCIPALLY ALUMINUM, SAID CORE MEMBER EXHIBITING A MAXIMUM SOLUTION POTENTIAL OF 0.840 VOLT, A PROTECTIVE ALUMINUM BASE ALLOY COATING ON SAID CORE MEMBER, SAID COATING ALLOY CONTAINING ZINC AS THE ESSENTIAL ADDED COMPONENT WITHIN THE RANGE 0.5 TO 2.5 PER CENT, BALANCE PRINCIPALLY ALUMINUM, SAID COATING ALLOY EXHIBITING A MINIMUM SOLUTION POTENTIAL OF 0.925 VOLT, AND SAID DUPLEX ALUMINOUS PRODUCT BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM MOLE-TRACK CORROSION.
Claim 2
Dependent Claim
136 words
A DUPLEX ALUMINOUS PRODUCT IN THE SOLUTION HEAT TREATED AND ARTIFICIALLY AGED CONDITION COMPOSED OF A SUBSTANTIALLY NICKEL-FREE ALUMINUM BASE ALLOY CORE MEMBER CONTAINING AS THE ESSENTIAL ADDED ELEMENTS FROM ABOUT 1.9 TO 4.5 PER CENT COPPER, FROM ABOUT 6 TO 9 PER CENT ZINC, THE RATIO OF COPPER TO ZINC BEING WITHIN THE RANGE .2 TO .7, AND FROM ABOUT 1 TO 3.5 PER CENT MAGNESIUM, BALANCE PRINCIPALLY ALUMINUM, SAID CORE MEMBER EXHIBITING A MAXIMUM SOLUTION POTENTIAL OF 0.840 VOLT, A PROTECTIVE ALUMINUM BASE ALLOY COATING ON SAID CORE MEMBER, SAID COATING ALLOY CONTAINING ZINC AS THE ESSENTIAL ADDED COMPONENT WITHIN THE RANGE 0.5 TO 2.5 PER CENT, BALANCE PRINCIPALLY ALUMINUM, SAID COATING ALLOY EXHIBITING A MINIMUM SOLUTION POTENTIAL OF 0.925 VOLT, AND SAID DUPLEX ALUMINOUS PRODUCT BEING CHARACTERIZED BY SUBSTANTIAL FREEDOM FROM MOLE-TRACK CORROSION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |