US3703367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-zinc alloys
Assignee: Tyco International Ltd
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Filing: 1970-12-04
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Granted: 1972-11-21
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Expires: 1990-12-04
Abstract
Abstract IMPROVED COPPER-ZINCE ALLOYS CONTAINING TITANIUM TOGETHER WITH ALUMINUM OR NICKEL OR BOTH. IF THE AMOUNTS OF TITANIUM, ALUMINUM, AND NICKEL ARE KEPT WITH CERTAIN LIMITS, THE ALLOYS ARE AGE-HARDENABLE AND A METHOD IS PROVIDED FOR HEAT TREATING SUCH ALLOYS TO ACHIEVE A SIGNIFICANT INCREASE IN HARDNESS AND STRENGTH PROPERTIES. BY INCREASING THE AMOUNTS OF TITANIUM, ALUMINUM, AND NICKEL, IT IS POSSIBLE TO ACHIEVE ALLOYS THAT ARE EXTREMELY HARD AFTER SOLUTION HEAT TREATING OR CASTING.
Inventors
- 👤 Franklin H Cocks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:08
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |