US2723449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dip brazing aluminous metal members
Assignee: Alcoa Corp
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Filing: 1954-04-23
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Granted: 1955-11-15
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Expires: 1974-04-23
Abstract
No abstract record available.
Inventors
- 👤 Mike A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD OF DIP BRAZING ALUMINOUS METAL COMPRISING PERIODICALLY IMMERSING ASSEMBLIES OF ALUMINOUS METAL MEMBERS AND FILLER METAL IN BRAZEABLE RELATIONSHIP IN A MOLTEN SALT BATH HAVING AS ITS ESSENTIAL COMPONENTS FROM 2 TO 70% BY WEIGHT OF AT LEAST ONE SALT OF THE GROUP CONSISTING OF THE CHLORIDES OF BERYLLIUM, MAGNESIUM, CALCIUM, STRONTIUM AND BARIUM, AND FROM 30 TO 80% OF AT LEAST ONE SALT FROM THE GROUP CONSISTING OF THE CHLORIDES OF SODIUM AND POTASSIUM, THE TOTAL AMOUNT OF ALL OF SAID CHLORIDES CONSTITUTING AT LEAST THE MAJOR PORTION OF THE BATH, AND ACTIVATING THE BATH AS A FLUX FOR BRAZING THE IMMERSED ASSEMBLIES BY AT LEAST PERIODICALLY ELECTROLYZING THE BATH BY PASSING DIRECT CURRENT THROUGH THE BATH, THE MAGNITUDE AND DURATION OF CURRENT FLOW BEING ADJUSTED TO LIBERATE NASCENT CHLORINE IN THE BATH.
Claim 2
Independent Claim
136 words
A METHOD OF DIP BRAZING ALUMINOUS METAL COMPRISING PERIODICALLY IMMERSING ASSEMBLIES OF ALUMINOUS METAL MEMBERS AND FILLER METAL IN BRAZEABLE RELATIONSHIP IN A MOLTEN SALT BATH HAVING AS ITS ESSENTIAL COMPONENTS FROM 2 TO 70% BY WEIGHT OF AT LEAST ONE SALT OF THE GROUP CONSISTING OF THE CHLORIDES OF BERYLLIUM, MAGNESIUM, CALCIUM, STRONTIUM AND BARIUM, AND FROM 30 TO 80% OF AT LEAST ONE SALT FROM THE GROUP CONSISTING OF THE CHLORIDES OF SODIUM AND POTASSIUM, THE TOTAL AMOUNT OF ALL OF SAID CHLORIDES CONSTITUTING AT LEAST THE MAJOR PORTION OF THE BATH, AND ACTIVATING THE BATH AS A FLUX FOR BRAZING THE IMMERSED ASSEMBLIES BY AT LEAST PERIODICALLY ELECTROLYZING THE BATH BY PASSING DIRECT CURRENT THROUGH THE BATH, THE MAGNITUDE AND DURATION OF CURRENT FLOW BEING ADJUSTED TO LIBERATE NASCENT CHLORINE IN THE BATH.
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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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |