US2754572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making roll welded hollow sheet metal structure
Assignee: Olin Corp
•
Filing: 1954-07-14
•
Granted: 1956-07-17
•
Expires: 1974-07-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur F Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:32
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; Y; Y10; Y10S; Y10S72/00; Y10S72/70; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49805
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN THE MANUFACTURE OF HOLLOW METAL FABRICATIONS FROM SHEET METAL BY A PROCESS WHICH INVOLVES INTERPOSING A PATTERN OF STOP-OFF MATERIAL BETWEEN ADJACENT SURFACES OF SHEET METAL LAYERS LYING IN FACE TO FACE RELATIONSHIP, FORGE WELDING BY ROLLING THOSE AREAS NOT PROTECTED BY THE STOP-OFF MATERIAL, AND THEREAFTER INFLATING THE UNWELDED AREAS BY MEANS OF FLUID PRESSURE; THE METHOD OF SECURING THE SHEET METAL LAYERS AGAINST RELATIVE SLIPPAGE BEFORE AND DURING ROLLING WITHOUT SPOT-WELDING WHICH COMPRISES, GROOVING A SINGLE SHEET OF METAL AND BENDING AND FOLDING THE SHEET TO PROVIDE THE PLURALITY OF LAYERS THEREOF LYING IN FACE TO FACE RELATIONSHIP PRIOR TO FORGE WELDING.
Claim 2
Dependent Claim
105 words
IN THE MANUFACTURE OF HOLLOW METAL FABRICATIONS FROM SHEET METAL BY A PROCESS WHICH INVOLVES INTERPOSING A PATTERN OF STOP-OFF MATERIAL BETWEEN ADJACENT SURFACES OF SHEET METAL LAYERS LYING IN FACE TO FACE RELATIONSHIP, FORGE WELDING BY ROLLING THOSE AREAS NOT PROTECTED BY THE STOP-OFF MATERIAL, AND THEREAFTER INFLATING THE UNWELDED AREAS BY MEANS OF FLUID PRESSURE; THE METHOD OF SECURING THE SHEET METAL LAYERS AGAINST RELATIVE SLIPPAGE BEFORE AND DURING ROLLING WITHOUT SPOT-WELDING WHICH COMPRISES, GROOVING A SINGLE SHEET OF METAL AND BENDING AND FOLDING THE SHEET TO PROVIDE THE PLURALITY OF LAYERS THEREOF LYING IN FACE TO FACE RELATIONSHIP PRIOR TO FORGE WELDING.
References Cited (Backward Citations)
US1265940A
Cited
US1940850A
Cited
US1938633A
Cited
US1979539A
Cited
US2123842A
Cited
US2118499A
Cited
US2212481A
Cited
US2498275A
Cited
US2690002A
Cited
US2662273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |