US3236699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tungsten-rhenium alloys
Assignee: General Electric Co
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Filing: 1963-05-09
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Granted: 1966-02-22
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Expires: 1983-05-09
Abstract
No abstract record available.
Inventors
- 👤 John W Pugh
- 👤 Lutfi H Amra
- 👤 Dallas T Hurd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:32
CPC Classifications
H; H01; H01K; H01K3/00; H01K3/02; C; C22; C22C; C22C1/00; C22C1/04; C22C1/045; C22C27/00; C22C27/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12424
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
211 words
THE METHOD OF PRODUCING A TUNGSTEN-REHENIUM ALLOY BODY CONSISTING ESSENTIALLY OF FROM A SMALL BUT EFFECTIVE AMOUNT TO INCREASE DUCTILITY TO ABOUT 7% RHENIUM BY WEIGHT, MINUTE QUANTITIES OF GRAIN-GROWTH-PROMOTING MATERIAL, AND BALANCE TUNGSTEN, WHICH COMPRISES TREATING TUNGSTEN OXIDE WITH EAGGERATED-GRAIN-GROWTH-PROMOTING MATERIAL, REDUCING THE TREATED OXIDE TO TUNGSTEN METAL POWDER IN A NON-OXIDIZING ATMOSPHERE, FORMING A MIXTURE OF AT LEAST ONE OF THE GROUP CONSISTING OF RHENIUM METAL POWDER AND A RHENIUM COMPOUND DECOMPOSABLE TO RHENIUM METAL AND VOLATILE MATTER WHEN HEATED UNDER NONOXIDIZING CONDITIONS TO ELEVATED TEMPERATURE SUFFICIENT TO SINTER THE TUNGSTEN POWDER WITH ONE OF THE GROUP CONSISTING OF SAID TREATED TUNGSTEN OXIDE POWDER BEFORE REDUCTION AND SAID TUNGSTEN METAL POWDER AFTER REDUCTION, WITH THE RHENIUM EXPRESSED AS METAL BEING AN AMOUNT SUCH THAT THE RHENIUM CONTENT OF THE PRODUCED TUNGSTENRHENIUM ALLOY IS FROM A SMALL BUT EFFECTIVE AMOUNT TO INCREASE DUCTILITY TO ABOUT 7% BY WEIGHT OF THE ALLOY, COMPACTING THE POWDER TO FORM AN INGOT, SINTERING THE INGOT IN A NON-OXIDIZING ENVIRONMENT, AND MECHANICALLY WORKING THE INGOT INTO AN ELONGATED ALLOY BODY WHEREBY THE ALLOY BODY, WHEN HEATED TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO CAUSE SUBSTANTIAL RECRYSTALLIZATION, IS DUCTILE AND SAG-RESISTANT AND SHOWS CRYSTAL GRAINS ELONGATED IN THE DIRECTION OF WORKING OF THE BODY.
Claim 2
Independent Claim
211 words
THE METHOD OF PRODUCING A TUNGSTEN-REHENIUM ALLOY BODY CONSISTING ESSENTIALLY OF FROM A SMALL BUT EFFECTIVE AMOUNT TO INCREASE DUCTILITY TO ABOUT 7% RHENIUM BY WEIGHT, MINUTE QUANTITIES OF GRAIN-GROWTH-PROMOTING MATERIAL, AND BALANCE TUNGSTEN, WHICH COMPRISES TREATING TUNGSTEN OXIDE WITH EAGGERATED-GRAIN-GROWTH-PROMOTING MATERIAL, REDUCING THE TREATED OXIDE TO TUNGSTEN METAL POWDER IN A NON-OXIDIZING ATMOSPHERE, FORMING A MIXTURE OF AT LEAST ONE OF THE GROUP CONSISTING OF RHENIUM METAL POWDER AND A RHENIUM COMPOUND DECOMPOSABLE TO RHENIUM METAL AND VOLATILE MATTER WHEN HEATED UNDER NONOXIDIZING CONDITIONS TO ELEVATED TEMPERATURE SUFFICIENT TO SINTER THE TUNGSTEN POWDER WITH ONE OF THE GROUP CONSISTING OF SAID TREATED TUNGSTEN OXIDE POWDER BEFORE REDUCTION AND SAID TUNGSTEN METAL POWDER AFTER REDUCTION, WITH THE RHENIUM EXPRESSED AS METAL BEING AN AMOUNT SUCH THAT THE RHENIUM CONTENT OF THE PRODUCED TUNGSTENRHENIUM ALLOY IS FROM A SMALL BUT EFFECTIVE AMOUNT TO INCREASE DUCTILITY TO ABOUT 7% BY WEIGHT OF THE ALLOY, COMPACTING THE POWDER TO FORM AN INGOT, SINTERING THE INGOT IN A NON-OXIDIZING ENVIRONMENT, AND MECHANICALLY WORKING THE INGOT INTO AN ELONGATED ALLOY BODY WHEREBY THE ALLOY BODY, WHEN HEATED TO A TEMPERATURE AND FOR A TIME SUFFICIENT TO CAUSE SUBSTANTIAL RECRYSTALLIZATION, IS DUCTILE AND SAG-RESISTANT AND SHOWS CRYSTAL GRAINS ELONGATED IN THE DIRECTION OF WORKING OF THE BODY.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |