US2813049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing rupture of metal structures
Assignee: Individual
•
Filing: 1953-01-09
•
Granted: 1957-11-12
•
Expires: 1973-01-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward M Maccutcheon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:37
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR INCREASING THE TOUGHNESS OF A NOTCHED METAL STRUCTURE, THE STRUCTURE COMPRISING STEEL WHICH HAS A NOTCH BRITTLE-TO-DUCTILE TRANSITION CHARACTERISTIC IN A TEMPERATURE RANGE COMPRISING AMBIENT TEMPERATURES TO WHICH THE STRUCTURE WILL BE SUBJECTED DURING SERVICE AFTER PERFORMANCE OF THE METHOD, THE METHOD COMPRISING WARMING NOTCHED PORTIONS OF THE STEEL TO A TEMPERATURE ABOVE THE NOTCH BRITTLE-TO-DUCTIBLE TRANSITION TEMPERATURE RANGE BUT AT WHICH PLASTIC FLOW OCCURS READILY, THE LAST SAID TEMPERATURE BEING SIGNIFICANTLY BELOW THE ANNEALING RANGE OF THE STEEL, AND STRAINING THE PORTIONS WHILE SO WARM TO PROMOTE PLASTIC FLOW.
Claim 2
Independent Claim
93 words
A METHOD FOR INCREASING THE TOUGHNESS OF A NOTCHED METAL STRUCTURE, THE STRUCTURE COMPRISING STEEL WHICH HAS A NOTCH BRITTLE-TO-DUCTILE TRANSITION CHARACTERISTIC IN A TEMPERATURE RANGE COMPRISING AMBIENT TEMPERATURES TO WHICH THE STRUCTURE WILL BE SUBJECTED DURING SERVICE AFTER PERFORMANCE OF THE METHOD, THE METHOD COMPRISING WARMING NOTCHED PORTIONS OF THE STEEL TO A TEMPERATURE ABOVE THE NOTCH BRITTLE-TO-DUCTIBLE TRANSITION TEMPERATURE RANGE BUT AT WHICH PLASTIC FLOW OCCURS READILY, THE LAST SAID TEMPERATURE BEING SIGNIFICANTLY BELOW THE ANNEALING RANGE OF THE STEEL, AND STRAINING THE PORTIONS WHILE SO WARM TO PROMOTE PLASTIC FLOW.
References Cited (Backward Citations)
US1570815A
Cited
US2429320A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |