US3440712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing aluminum
Assignee: Alcoa Corp
•
Filing: 1966-10-27
•
Granted: 1969-04-29
•
Expires: 1986-10-27
Abstract
No abstract record available.
Inventors
- 👤 Philip T Stroup
- 👤 Charles Norman Cochran
- 👤 John J Stokes Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:39
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/28; B23K35/286; B23K35/001; B23K35/002; C; C22; C22C; C22C21/00; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12764
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
THE METHOD OF BRAZING ALUMINUM MEMBERS COMPRISING: (1) BRINGING INTO JOINING RELATIONSHIP THE JOINT CONSITUENTS TO PROIDE AN ASSEMBLY WHICH COMPRISES SAID MEMBERS TOGETHER WITH AN ALUMINUM BASE BRAZ ING FILLER ALLOY DISPOSED AT THE JOINING SITE, AT LEAST ONE OF SAID JOINT CONSTITUENTS CONTAINING 0.0001 TO 1%, BY WEIGHT, OF AT LEST ONE METAL ADDITIVE SELECTED FROM THE GROUP CONSISTING OF SCANDIUM, YTRIUM AND THE LANTHANIDE METALS FROM PERIOD 6 OF THE PERIODIC TABLE, THE COMBINED TOTAL OF SAID ADDITIVES NOT EXCEEDING 1% (2) HEATING SAID ASSEMBLY IN A VACUUM TO EFFECT OUTGASSING THEREFROM, (3) SUBJECTING SAID ASSEMBLY TO BRAZING TEMPERATURE IN THE PRESENCE OF AT LEAST ONE GASEOUS FLUX SELECTED FROM THE GROUP CONSISTING OF THE PENTACHLORIDE AND PENTABROMIDE OF PHOSPHORS AND THE TRIVALENT CHLORIDES, BROMIDES AND IODIDES OF PHOSPHORUS AND BORON, (4) MAINTAINING SAID ABRAZING TEMPERATURE AND SAID GASEOUS FLUX AT SAID FILLER METAL TO WET, AND FORM A JOINING FILLET CONNECTING, SAID MEMBERS AT SAID JOINING SITE, (5) SOLIDFYING SAID FILLER METAL.
Claim 2
Independent Claim
166 words
THE METHOD OF BRAZING ALUMINUM MEMBERS COMPRISING: (1) BRINGING INTO JOINING RELATIONSHIP THE JOINT CONSITUENTS TO PROIDE AN ASSEMBLY WHICH COMPRISES SAID MEMBERS TOGETHER WITH AN ALUMINUM BASE BRAZ ING FILLER ALLOY DISPOSED AT THE JOINING SITE, AT LEAST ONE OF SAID JOINT CONSTITUENTS CONTAINING 0.0001 TO 1%, BY WEIGHT, OF AT LEST ONE METAL ADDITIVE SELECTED FROM THE GROUP CONSISTING OF SCANDIUM, YTRIUM AND THE LANTHANIDE METALS FROM PERIOD 6 OF THE PERIODIC TABLE, THE COMBINED TOTAL OF SAID ADDITIVES NOT EXCEEDING 1% (2) HEATING SAID ASSEMBLY IN A VACUUM TO EFFECT OUTGASSING THEREFROM, (3) SUBJECTING SAID ASSEMBLY TO BRAZING TEMPERATURE IN THE PRESENCE OF AT LEAST ONE GASEOUS FLUX SELECTED FROM THE GROUP CONSISTING OF THE PENTACHLORIDE AND PENTABROMIDE OF PHOSPHORS AND THE TRIVALENT CHLORIDES, BROMIDES AND IODIDES OF PHOSPHORUS AND BORON, (4) MAINTAINING SAID ABRAZING TEMPERATURE AND SAID GASEOUS FLUX AT SAID FILLER METAL TO WET, AND FORM A JOINING FILLET CONNECTING, SAID MEMBERS AT SAID JOINING SITE, (5) SOLIDFYING SAID FILLER METAL.
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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) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |