US3373483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluxless aluminum brazing
Assignee: General Electric Co
•
Filing: 1966-09-19
•
Granted: 1968-03-19
•
Expires: 1986-09-19
Abstract
No abstract record available.
Inventors
- 👤 Miller Clarence John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:52
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A FLUXLESS METHOD OF MAKING A FABRICATED STRUCTURE FROM METALLIC MEMBERS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ITS ALKLOYS COMPRISING THE STEPS OF; (A) ASSEMBLING THE MEMBERS IN DESIRED BRAZING RELATIONSHIP; (B) PROVIDING AT THE PROPOSED JUNCTURE BETWEEN THE MEMBERS AN ALLOY INCLUDING ABOUT 3-15% SI; ABOUT 0.4-10% MG; WITH THE BALANCE ALUMINUM AND INCIDENTAL IMPURTIES; (C) PROVIDING A NON-OXIDIZING ATMOSPHERE IN THE SPACE AROUND THE MEMBERS; (D) RAISING THE TEMPERATURE OF THE MEMBERS TO AT LEAST ABOUT 550*C. BUT LESS THE MELTING POINT OF THE MEMBERS; AND THEN (C) COOLING THE MEMBERS BELOW ABOUT 550*C. PRIOR TO REMOVING THEM FROM THE ANO-OXIDIZING ATMOSPHERE.
Claim 2
Dependent Claim
106 words
A FLUXLESS METHOD OF MAKING A FABRICATED STRUCTURE FROM METALLIC MEMBERS SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ITS ALKLOYS COMPRISING THE STEPS OF; (A) ASSEMBLING THE MEMBERS IN DESIRED BRAZING RELATIONSHIP; (B) PROVIDING AT THE PROPOSED JUNCTURE BETWEEN THE MEMBERS AN ALLOY INCLUDING ABOUT 3-15% SI; ABOUT 0.4-10% MG; WITH THE BALANCE ALUMINUM AND INCIDENTAL IMPURTIES; (C) PROVIDING A NON-OXIDIZING ATMOSPHERE IN THE SPACE AROUND THE MEMBERS; (D) RAISING THE TEMPERATURE OF THE MEMBERS TO AT LEAST ABOUT 550*C. BUT LESS THE MELTING POINT OF THE MEMBERS; AND THEN (C) COOLING THE MEMBERS BELOW ABOUT 550*C. PRIOR TO REMOVING THEM FROM THE ANO-OXIDIZING ATMOSPHERE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |