US3072508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treating copper base alloy
Assignee: Ampco Metal Inc
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Filing: 1961-02-15
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Granted: 1963-01-08
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Expires: 1981-02-15
Abstract
No abstract record available.
Inventors
- 👤 John F Klement
- 👤 Quentin F Ingerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:50
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF HEAT TREATING A COPPER BASE ALLOY CONTAINING FROM 0.75 TO 2.0% NICKEL, 0.25 TO 1.0% SILICON, 0.25 TO 1.25% CHROMIUM AND THE BALANCE COPPER, COMPRISING THE STEPS OF HEATING THE ALLOY TO A TEMPERATURE IN THE RANGE OF 850 TO 1025*F., HOLDING THE ALLOY AT SAID TEMPERATURE TO OBTAIN AN EVEN DISTRIBUTION OF HEAT, FURNACE COOLING THE ALLOY TO A TEMPERATURE IN THE RANGE OF 750 TO 900*F., HOLDING THE ALLOY AT SAID LAST NAMED TEMPERATURE RANGE FOR A PERIOD OF TIME SUFFICIENT TO OBTAIN AN OPTIMUM PRECIPITATION OF NICKEL SILICIDE AND CHROMIUM SILICIDE, AND SUBSEQUENTLY COOLING THE ALLOY TO ROOM TEMPERATURE.
Claim 2
Independent Claim
105 words
A METHOD OF HEAT TREATING A COPPER BASE ALLOY CONTAINING FROM 0.75 TO 2.0% NICKEL, 0.25 TO 1.0% SILICON, 0.25 TO 1.25% CHROMIUM AND THE BALANCE COPPER, COMPRISING THE STEPS OF HEATING THE ALLOY TO A TEMPERATURE IN THE RANGE OF 850 TO 1025*F., HOLDING THE ALLOY AT SAID TEMPERATURE TO OBTAIN AN EVEN DISTRIBUTION OF HEAT, FURNACE COOLING THE ALLOY TO A TEMPERATURE IN THE RANGE OF 750 TO 900*F., HOLDING THE ALLOY AT SAID LAST NAMED TEMPERATURE RANGE FOR A PERIOD OF TIME SUFFICIENT TO OBTAIN AN OPTIMUM PRECIPITATION OF NICKEL SILICIDE AND CHROMIUM SILICIDE, AND SUBSEQUENTLY COOLING THE ALLOY TO ROOM TEMPERATURE.
References Cited (Backward Citations)
CA497166A
Cited
US1658186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |