US2914346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding stainless steel and welded joints
Assignee: Griscom Russell Co
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Filing: 1954-05-21
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Granted: 1959-11-24
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Expires: 1974-05-21
Abstract
No abstract record available.
Inventors
- 👤 Anthony J Ryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:03
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/04; F28F9/16; F28F9/18; B; B23; B23K; B23K35/00; B23K35/001; B23K35/004; B23K9/00; B23K9/02; B23K9/028; B23K9/0288; F16; F16L; F16L41/00; F16L41/08; F16L41/082; F16L41/084; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/104; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12729; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12958; Y10T428/12965
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A SOUND MICROFISSURE-FREE WELDED JOINT BETWEEN A METAL HEAT EXCHANGER TUBES SHEET AND A METAL TUBE EXTENDING THROUGH THE TUBE SHEET EACH FORMED OF TYPE 347 AUSTENITIC STAINLESS STEEL HAVING POOR WELDABILITY SUBJECT TO MICROFISSURING ON COOLING FROM WELDING TEMPERATURE, THE JOINT INCLUDING A TUBULAR WALL PORTION FORMED ON THE TUBE SHEET AND HAVING A RADIAL WALL THICKNESS, A TUBULAR END PORTION ON THE TUBE TELESCOPED IN SAID TUBULAR WALL PORTION, SAID TUBE END PORTION HAVING A RADIAL WALL THICKNESS SUBSTANTIALLY EQUAL TO THE RADIAL WALL THICKNESS OF
Claim 2
Dependent Claim
88 words
A SOUND MICROFISSURE-FREE WELDED JOINT BETWEEN A METAL HEAT EXCHANGER TUBES SHEET AND A METAL TUBE EXTENDING THROUGH THE TUBE SHEET EACH FORMED OF TYPE 347 AUSTENITIC STAINLESS STEEL HAVING POOR WELDABILITY SUBJECT TO MICROFISSURING ON COOLING FROM WELDING TEMPERATURE, THE JOINT INCLUDING A TUBULAR WALL PORTION FORMED ON THE TUBE SHEET AND HAVING A RADIAL WALL THICKNESS, A TUBULAR END PORTION ON THE TUBE TELESCOPED IN SAID TUBULAR WALL PORTION, SAID TUBE END PORTION HAVING A RADIAL WALL THICKNESS SUBSTANTIALLY EQUAL TO THE RADIAL WALL THICKNESS OF
Claim 3
Independent Claim
200 words
THE METHOD OF FORMING A SOUND, MICORPFSSURE-FREE WELDED JOINT BETWEEN A METAL HEAT EXCHANGER TUBE SHEET AND A METAL TUBE EXTENDING THROUGH THE TUBE SHEET EACH FORMED OF TYPE 347 AUSTENITIC STAINLESS STEEL HAVING POOR WELDABILITY SUBJECT TO MICROFISSURING ON COOLING FROM WELDING TEMPERATURE, WHICH INCLUDES THE STEPS OF PROVIDING A TYPE 347 AUSTENITIC STAINLESS STEEL TUBE SHEET, FORMING A TUBE HOLE THROUGH THE TUBE SHEET, FORMING A CYLINDRICAL WALL PORTION IN THE TUBE SHEET SURROUNDING ONE END OF SAID HOLE AND HAVING A RIDIAL WALL THICKNESS, PROVIDING A ZONE OF SAID CYLINDRICAL WALL PORTION EXTENDING FROM SAID ONE END OF SID HOLE AND THROUGHOUT SAID RADIAL WALL THICKNESS WITH ABOUT 8% FERRITE-CONTAINING TYPE 347 AUSTENITIC STAINLESS STEEL WELD MATERIAL, TELESCOPING A TYPE 347 AUSTENITIC STAINLESS STEEL TUBE IN SAID HOLE WITH ONE TUBE END PORTION FITTING WITHIN SAID FERRITE-CONTAINING CYLINDRICAL WALL PORTION, FORMING THE FERRICT-CONTAINING ZONE WITH A RADIAL WALL THICKNESS AT LEAST SUBSTANTIALLY AS GREAT AS THE RIDIAL WALL THICKNESS OF THE TUBE, AND FORMING A FUSED WELD FREE OF ADDED WELD MATERIAL OTHER THAN ABOUT 8% FERRITE-CONTAINING TYPE 347 AUSTENITIC STAINLESS STEEL WELD MATERIAL BETWEEN SAID TUBE END AND SAID FERRITE-CONTAINING CYLINDRICAL WALL PORTION OF THE SHEET.
Claim 4
Independent Claim
200 words
THE METHOD OF FORMING A SOUND, MICORPFSSURE-FREE WELDED JOINT BETWEEN A METAL HEAT EXCHANGER TUBE SHEET AND A METAL TUBE EXTENDING THROUGH THE TUBE SHEET EACH FORMED OF TYPE 347 AUSTENITIC STAINLESS STEEL HAVING POOR WELDABILITY SUBJECT TO MICROFISSURING ON COOLING FROM WELDING TEMPERATURE, WHICH INCLUDES THE STEPS OF PROVIDING A TYPE 347 AUSTENITIC STAINLESS STEEL TUBE SHEET, FORMING A TUBE HOLE THROUGH THE TUBE SHEET, FORMING A CYLINDRICAL WALL PORTION IN THE TUBE SHEET SURROUNDING ONE END OF SAID HOLE AND HAVING A RIDIAL WALL THICKNESS, PROVIDING A ZONE OF SAID CYLINDRICAL WALL PORTION EXTENDING FROM SAID ONE END OF SID HOLE AND THROUGHOUT SAID RADIAL WALL THICKNESS WITH ABOUT 8% FERRITE-CONTAINING TYPE 347 AUSTENITIC STAINLESS STEEL WELD MATERIAL, TELESCOPING A TYPE 347 AUSTENITIC STAINLESS STEEL TUBE IN SAID HOLE WITH ONE TUBE END PORTION FITTING WITHIN SAID FERRITE-CONTAINING CYLINDRICAL WALL PORTION, FORMING THE FERRICT-CONTAINING ZONE WITH A RADIAL WALL THICKNESS AT LEAST SUBSTANTIALLY AS GREAT AS THE RIDIAL WALL THICKNESS OF THE TUBE, AND FORMING A FUSED WELD FREE OF ADDED WELD MATERIAL OTHER THAN ABOUT 8% FERRITE-CONTAINING TYPE 347 AUSTENITIC STAINLESS STEEL WELD MATERIAL BETWEEN SAID TUBE END AND SAID FERRITE-CONTAINING CYLINDRICAL WALL PORTION OF THE SHEET.
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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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |