US3081534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum base brazing alloy
Assignee: IIT Research Institute
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Filing: 1960-11-18
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Granted: 1963-03-19
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Expires: 1980-11-18
Abstract
No abstract record available.
Inventors
- 👤 Nikolajs T Bredzs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:57
CPC Classifications
C; C22; C22C; C22C21/00; C22C21/02; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
THE METHOD OF THE FLUXLESS JOINING OF ALUMINUM WHICH COMPRISES THE STEPS OF: MAKING AN ALLOY CONSISTING ESSENTIALLY OF FROM 4.9 PERCENT TO 10 PERCENT SILICON, O TO 4 PERCENT COPPER, 0.1 PERCENT LITHIUM, BALANCE ALUMINUM; FABRICATING SAID ALLOY COMPOSITION INTO A FOIL MEMBER; CONTACTING SAID FOIL MEMBER INTERMEDIATE THE ALUMINUM SURFACES TO BE JOINED; HEATING SAID FOIL IN CONTACT WITH SAID ALUMINUM TO ABOVE THE MELTING POINT OF SAID FOIL IN A MOISTURE-BEARING ATMOSPHERE AND THEN PERMITTING SAID MELTED FOIL TO COOL AND SOLIDIFY.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |