US3194697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treatment of refractory metals
Assignee: General Electric Co
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Filing: 1962-09-28
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Granted: 1965-07-13
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Expires: 1982-09-28
Abstract
No abstract record available.
Inventors
- 👤 Winston H Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:35
CPC Classifications
C; C22; C22F; C22F1/00; C22F1/16; C22F1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A METHOD FOR HEATING TREATING A METAL ALLOY BASED ON A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF MO, W, CB, TA AND CR INCLUDING CARBON IN THE RANGE OF ABOUT 0.1-0.2 WEIGHT PERCENT, THE STEPS OF: ANNEALING THE ALLOY AT A TEMPERATURE OF ABOUT 2500-4000*F. FOR A TIME SUFFICIENT TO PLACE CARBON IN SOLUTION WITH THE BASE METAL; AGING THE ALLOY PRIOR TO FINAL PROCESSING FOR ABOUT 1-50 HOURS AT A TEMPERATURE OF ABOUT 1800-2800*F. TO PRECIPITATE FINE METAL CARBIDES INT EH MICROSTRUCTURE OF THE ALLOY; AND THEN REDUCING THE ALLOY TO A FINISHED FORM.
Claim 2
Dependent Claim
98 words
IN A METHOD FOR HEATING TREATING A METAL ALLOY BASED ON A REFRACTORY METAL SELECTED FROM THE GROUP CONSISTING OF MO, W, CB, TA AND CR INCLUDING CARBON IN THE RANGE OF ABOUT 0.1-0.2 WEIGHT PERCENT, THE STEPS OF: ANNEALING THE ALLOY AT A TEMPERATURE OF ABOUT 2500-4000*F. FOR A TIME SUFFICIENT TO PLACE CARBON IN SOLUTION WITH THE BASE METAL; AGING THE ALLOY PRIOR TO FINAL PROCESSING FOR ABOUT 1-50 HOURS AT A TEMPERATURE OF ABOUT 1800-2800*F. TO PRECIPITATE FINE METAL CARBIDES INT EH MICROSTRUCTURE OF THE ALLOY; AND THEN REDUCING THE ALLOY TO A FINISHED FORM.
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) | 1968-07-12 | 1969-01-11 | 1969-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-12 | 1973-01-11 | 1973-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-12 | 1977-01-11 | 1977-07-13 | $7700.00 | Window Closed / Lapsed |