US3302281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a brazed seam
Assignee: Etc Inc
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Filing: 1964-07-29
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Granted: 1967-02-07
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Expires: 1984-07-29
Abstract
No abstract record available.
Inventors
- 👤 Richard B Freeman
- 👤 Paul J Spangler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:58
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/10; H01R4/18; H01R4/187; B; B23; B23K; B23K1/00; B23K1/14; B23K1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A METHOD OF FORMING A BRAZED SEAM BETWEEN TWO SHEET METAL EDGES, COMPRISING THE STEPS OF PROVIDING SERRATIONS ALONG ONE EDGE OF AT LEAST ONE OF THE SHEETS, SAID SERRATIONS EXTENDING INWARDLY INTO SAID EDGE FOR A DISTANCE THAT IS NOT SUBSTANTIALLY LESS THAN ONE-TENTH OF THE THICKNESS OF THE SHEET AND IS NOT SUBSTANTIALLY GREATER THAN THE THINKNESS OF THE SHEET, BUTTING THE SERRATED EDGE OF ONE OF THE SHEETS WITH AN EDGE OF THE OTHER SHEET SO THAT A V-SHAPED GROOVE IS FORMED THEREBETWEEN WITH THE SERRATIONS OPENING INTO THE GROOVE, WETTING SUBSTANTIALLY ALL OF THE SURFACE OF SAID GROOVE AND SAID SERRATIONS AND FILLING THE SAME WITH A LIQUID BRAZING ALLOY, AND COOLING SAID LIQUID ALLOY TO FORM A BRAZED SEAM.
Claim 2
Independent Claim
124 words
A METHOD OF FORMING A BRAZED SEAM BETWEEN TWO SHEET METAL EDGES, COMPRISING THE STEPS OF PROVIDING SERRATIONS ALONG ONE EDGE OF AT LEAST ONE OF THE SHEETS, SAID SERRATIONS EXTENDING INWARDLY INTO SAID EDGE FOR A DISTANCE THAT IS NOT SUBSTANTIALLY LESS THAN ONE-TENTH OF THE THICKNESS OF THE SHEET AND IS NOT SUBSTANTIALLY GREATER THAN THE THINKNESS OF THE SHEET, BUTTING THE SERRATED EDGE OF ONE OF THE SHEETS WITH AN EDGE OF THE OTHER SHEET SO THAT A V-SHAPED GROOVE IS FORMED THEREBETWEEN WITH THE SERRATIONS OPENING INTO THE GROOVE, WETTING SUBSTANTIALLY ALL OF THE SURFACE OF SAID GROOVE AND SAID SERRATIONS AND FILLING THE SAME WITH A LIQUID BRAZING ALLOY, AND COOLING SAID LIQUID ALLOY TO FORM A BRAZED SEAM.
References Cited (Backward Citations)
US1754721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |