Patent US3293741A successfully refreshed from Google Patents.
US3293741A
Expired / Lapsed
US
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Brazing alloys for refractory metals
Assignee: Individual
•
Filing: 1964-04-20
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Granted: 1966-12-27
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Expires: 1984-04-20
Abstract
No abstract record available.
Inventors
- 👤 Ralph G Gilliland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:25
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/325
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
THE METHOD OF JOINING TUNGSTEN, TANTALUM, NIOBIUM, MOLYBDENUM AND ALLOYS CONTAINING A PREDOMINANT PROPORTION OF SAID METALS TO THEMSELVES AND TO ONE ANOTHER WHICH COMPRISES DISPOSING SURFACES OF THE PARTS TO BE JOINED IN ABUTTING RELATIONSHIP WITH A BRAZING ALLOWY DISPOSED ADJACENT SAID ABUTTING SURFACE, SAID BRAZING ALLOY CONSISTING OF 5 TO 80 WEIGHT PERCENT VANADIUM, 5 TO 50 WEIGHT PERCENT TANTALUM, 5 TO 75 WEIGHT PERCENT TITANIUM, HEATING THE RESULTING ASSEMBLY TO BRAZING TEMPERATURE IN THE RANGE OF ABOUT 3000*F. TO 3400*F. UNDER NON-OXIDIZING CONDITIONS AND COOLING THE RESULTING BRAZED JOINT.
References Cited (Backward Citations)
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Cited
US3038249A
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US3128178A
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US3111406A
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US3131059A
Cited
US3161503A
Cited
US3220828A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |