US2823992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steels
Assignee: American Metallurgical Products Co
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Filing: 1956-11-09
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Granted: 1958-02-18
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Expires: 1976-11-09
Abstract
No abstract record available.
Inventors
- 👤 Wilbur T Bolkcom
- 👤 William E Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12; C22C38/04; C22C38/18; C22C38/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
AN IMPACT RESISTING STEEL ALLOY COMPRISING ABOUT 0.1 TO 1% CARBON, ABOUT 0.2 TO 6% MANGANESE, ABOUT 0.1 TO 0.75% SILICON, NIL TO ABOUT 0.04% PHOSPHORUS, NIL TO ABOUT 0.04% SULPHUR, NIL TO ABOUT 5% OF ONE OR MORE OF THE GROUP MOLYBDENUM, CHROMIUM AND TUNGSTEN, NIL TO ABOUT 4% NICKEL, THE RESIDUE FROM THE TREATMENT OF THE MOLTEN METAL WITH ABOUT 0.0015 TO 0.5% RARE EARTH METALS AFTER REDUCING THE TOTAL OXIDE TO BELOW 0.007% AND THE BALANCE SUBSTANTIALLY IRON WITH RESIDUAL IMPURITIES IN ORDINARY AMOUNTS.
Claim 2
Dependent Claim
87 words
AN IMPACT RESISTING STEEL ALLOY COMPRISING ABOUT 0.1 TO 1% CARBON, ABOUT 0.2 TO 6% MANGANESE, ABOUT 0.1 TO 0.75% SILICON, NIL TO ABOUT 0.04% PHOSPHORUS, NIL TO ABOUT 0.04% SULPHUR, NIL TO ABOUT 5% OF ONE OR MORE OF THE GROUP MOLYBDENUM, CHROMIUM AND TUNGSTEN, NIL TO ABOUT 4% NICKEL, THE RESIDUE FROM THE TREATMENT OF THE MOLTEN METAL WITH ABOUT 0.0015 TO 0.5% RARE EARTH METALS AFTER REDUCING THE TOTAL OXIDE TO BELOW 0.007% AND THE BALANCE SUBSTANTIALLY IRON WITH RESIDUAL IMPURITIES IN ORDINARY AMOUNTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |