US3605254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallurgical bonding
Assignee: Pechiney SA
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Filing: 1968-09-06
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Granted: 1971-09-20
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Expires: 1988-09-06
Abstract
Abstract A PROCESS FOR PROVIDING A METALLURGICAL BOND BETWEEN A SPECIAL METAL PIECE OF TI, ZR, HF, U, NB, TA OR ALLOYS OF THESE METALS AND A STEEL PIECE. A MECHANICAL JUNCTION IS FIRST PREPARED PROVIDING A SLIGHT CLEARANCE BETWEEN BOTH PIECES. THE SURFACES OF THE PIECES FACING THE JUNCTION ARE TREATED WITH A MOLTEN FLUX. THEREAFTER, THE JUNCTION IS FILLED WITH A BRAZING ALLOY CONSISTING ESSENTIALLY OF AL, SI, FE AND THE SPECIAL METAL. AFTER THE JUNCTION IS FILLED, IT IS ALLOWED TO COOL.
Inventors
- 👤 Marcel Armand
- 👤 Jean-Pierre Givord
- 👤 Michel Charveriat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:06
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |