US3046650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braze bonding of columbium
Assignee: Individual
•
Filing: 1959-11-23
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Granted: 1962-07-31
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Expires: 1979-11-23
Abstract
No abstract record available.
Inventors
- 👤 Richard L Heestand
- 👤 Marion L Picklesimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:00
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN AN IMPROVED PROCESS FOR BRAZING COLUMBIUM PARTS TOGETHER IN WHICH THE FORMATION OF A BRITTLE PHASE IN THE HEAT-AFFECTED AREA IS AVOIDED, THE STEPS WHICH COMPRISE DISPOSING SELECTED SURFACES OF SAID PARTS TO BE BRAZED TOGETHER IN ABUTTING RELATIONSHIP WITH A BRAZING ALLOY DISPOSED ADJACENT SAID ABUTTING SURFACES, SAID BRAZING ALLOY BEING SELECTED FROM THE GROUP CONSISTING OF, BY WEIGHT, (A) 12-25% COLUMBIUM AND THE BALANCE ZIRCONIUM (B) 0.55% MOLYBDENUM, 12-25% COLUMBIUM AND THE BALANCE ZIRCONIUM, HEATING SAID ALLOY TO AT LEAST ITS MELTING POINT TO BRAZED SAID PARTS TOGETHER, AND THEREAFTER COOLING THE BRAZED JOINT, SAID HEATING AND COOLING TAKING PLACE IN AN ATMOSPHERE SELECTED FROM ARGON AND HELIUM.
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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |