US3676115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zinc alloys
Assignee: UK Secretary of State for Defence
•
Filing: 1969-04-22
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Granted: 1972-07-11
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Expires: 1989-04-22
Abstract
Abstract THE NEW ALLOYS COMPRISE BY WEIGHT ZINC WITHIN THE RANGE 70-82 PERCENT (THE REMAINDER BEING SUBSTANTIALLY ALUMINUM) AND MAGNESIUM WITH THE RANGE GREATER THAN 0.05 TO 0.25 PERCENT WHICH MAY CONTAIN UP TO 2 PERCENT OF ONE OR MORE OF THE ELEMENTS COPPER, NICKEL AND SILVER. THE MAGNESIUM IN THE ABOVE ALLOYS MAY BE REPLACED BY LITHIUM. AN EXAMPLE OF THESE ALLOYS CONTAINS ZINC AND ALUMINIUM WITHIN THE ABOVE PRESCRIBED LIMITS AND MAGNESIUM AND COPPER WITHIN THE RANGE 0.125$0.025 AND 1.25$0.25 PERCENT RESPECTIVELY. THE ALLOYS HAVE IMPROVED MECHANICAL PROPERTIES AND CORROSION RESISTANCE AND THE MICROSTRUCTURES PRODUCED
Inventors
- 👤 George Anthony Hare
- 👤 Alan Ernest William Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
C; C22; C22C; C22C18/00; C22C18/04; C22F; C22F1/00; Y; Y10; Y10S; Y10S420/00; Y10S420/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |