US3386862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength structural steel
Assignee: Ford Motor Co
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Filing: 1966-06-22
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Granted: 1968-06-04
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Expires: 1986-06-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Johnston
- 👤 Raymond C Boettner
- 👤 Richard H Bush
- 👤 Jr Arthur J Mcevily
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/08; C22C38/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
THE PROCESS OF PRODUCING A WELDABLE STRUCTURAL STEEL OBJECT HAVING IN THE AS-ROLLED CONDITION, A MASSIVE MARTENSITIC STRUCTURE ESSENTIALLY FREE OF EQUIAXED FERRITE, A MINIUMUM YIELD STRENGTH OF 80K S.I. AND A MINIMUM IMPACT ENERGY ABSORPTION VALUE AT -40*F. OF 40 FOOT POUNDS COMPRISING FABRICATING AN ALLOY HAVING A MAXIMUM CARBON CONTENT OF 0.07%, A CONTENT OF ALLOYING METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, MOLYBDENUM, CHROMIUM, MANGANESE AND SILICON IN AN AMOUNT NOT SUBSTANTIALLY IN EXCESS OF 7%, THE SUM OF COMBINATIONS OF THE NICKEL, MOLYBDENUM, CHROMIUM AND MANGANESE NOT EXCEEDING ABOUT 6%, THE ALLOY CONTAINING SIGNIFICANT AMOUNTS OF METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, MANGANESE AND COMBINATIONS OF NICKEL AND MANGANESE SUCH THAT THE TRANSFORMATION OF AUSTENITE TO MASSIVE MARTENSITE IS RETARDED AT TEMPERATURES ABOVE 1300* F., THE ALLOY FURTHER CONTAINING SIGNIFICANT AMOUNTS OF METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM AND COMBINATIONS OF CHROMIUM AND MOLYBDENUM SUCH THAT THE TRANSFORMATION OF AUSTENITE TO
Claim 2
Dependent Claim
161 words
THE PROCESS OF PRODUCING A WELDABLE STRUCTURAL STEEL OBJECT HAVING IN THE AS-ROLLED CONDITION, A MASSIVE MARTENSITIC STRUCTURE ESSENTIALLY FREE OF EQUIAXED FERRITE, A MINIUMUM YIELD STRENGTH OF 80K S.I. AND A MINIMUM IMPACT ENERGY ABSORPTION VALUE AT -40*F. OF 40 FOOT POUNDS COMPRISING FABRICATING AN ALLOY HAVING A MAXIMUM CARBON CONTENT OF 0.07%, A CONTENT OF ALLOYING METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, MOLYBDENUM, CHROMIUM, MANGANESE AND SILICON IN AN AMOUNT NOT SUBSTANTIALLY IN EXCESS OF 7%, THE SUM OF COMBINATIONS OF THE NICKEL, MOLYBDENUM, CHROMIUM AND MANGANESE NOT EXCEEDING ABOUT 6%, THE ALLOY CONTAINING SIGNIFICANT AMOUNTS OF METAL SELECTED FROM THE GROUP CONSISTING OF NICKEL, MANGANESE AND COMBINATIONS OF NICKEL AND MANGANESE SUCH THAT THE TRANSFORMATION OF AUSTENITE TO MASSIVE MARTENSITE IS RETARDED AT TEMPERATURES ABOVE 1300* F., THE ALLOY FURTHER CONTAINING SIGNIFICANT AMOUNTS OF METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM AND COMBINATIONS OF CHROMIUM AND MOLYBDENUM SUCH THAT THE TRANSFORMATION OF AUSTENITE TO
References Cited (Backward Citations)
GB703911A
Cited
US3132025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |