Patent US3369893A successfully refreshed from Google Patents.
US3369893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper-zinc alloys
Assignee: Cyprus Amax Minerals Co
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Filing: 1964-12-28
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Granted: 1968-02-20
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Expires: 1984-12-28
Abstract
No abstract record available.
Inventors
- 👤 William R Opie
- 👤 Jan A Paces
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:49
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04; H; H01; H01B; H01B1/00; H01B1/02; H01B1/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
AN ALLOY CONSISTING ESSENTIALLY OF, BY WEIGHT, ABOUT 0.05% TO ABOUT 0.35% BERYLLIUM, ABOUT 0.08% TO ABOUT 0.5% TITANIUM, UP TO ABOUT 0.5% CHROMIUM, UP TO ABOUT 10% ALUMINUM, ABOUT 10% TO ABOUT 45% ZINC WITH THE SUM OF ALUMINUM AND ZINC BEING ABOUT 10% TO ABOUT 45% LESS THAN ABOUT 0.1% LITHIUM AND THE BALANCE, APART FROM INCIDENTAL ELEMENTS, BEING COPPER IN AMOUNTS OF AT LEAST ABOUT 54.5%.
Claim 2
Dependent Claim
69 words
AN ALLOY CONSISTING ESSENTIALLY OF, BY WEIGHT, ABOUT 0.05% TO ABOUT 0.35% BERYLLIUM, ABOUT 0.08% TO ABOUT 0.5% TITANIUM, UP TO ABOUT 0.5% CHROMIUM, UP TO ABOUT 10% ALUMINUM, ABOUT 10% TO ABOUT 45% ZINC WITH THE SUM OF ALUMINUM AND ZINC BEING ABOUT 10% TO ABOUT 45% LESS THAN ABOUT 0.1% LITHIUM AND THE BALANCE, APART FROM INCIDENTAL ELEMENTS, BEING COPPER IN AMOUNTS OF AT LEAST ABOUT 54.5%.
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) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |