Patent US2494736A successfully refreshed from Google Patents.
US2494736A
Expired / Lapsed
US
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Copper base alloy
Assignee: Olin Industries Inc
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Filing: 1945-10-20
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Granted: 1950-01-17
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Expires: 1965-10-20
Abstract
No abstract record available.
Inventors
- 👤 John D Berwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:58
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
37 words
A COPPER-BASE ALLOY SUSCEPTIBLE TO ANNEALING AT RELATIVELY LOW TEMPERATURES BETWEEN COLD WORKING OPERATIONS COMPOSED OF 4% TO 15.5% ZINC, 3.5% TO 6.5% ALUMINUM, 1% TO 2.5% MANGANESE, AND THE BALANCE COOPER CONTENT BEING 80% TO 89%.
Claim 2
Dependent Claim
37 words
A COPPER-BASE ALLOY SUSCEPTIBLE TO ANNEALING AT RELATIVELY LOW TEMPERATURES BETWEEN COLD WORKING OPERATIONS COMPOSED OF 4% TO 15.5% ZINC, 3.5% TO 6.5% ALUMINUM, 1% TO 2.5% MANGANESE, AND THE BALANCE COOPER CONTENT BEING 80% TO 89%.
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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |