US3070438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat treated alloy steels
Assignee: National Research Development Corp UK
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Filing: 1959-05-21
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Granted: 1962-12-25
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Expires: 1979-05-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneford Arthur Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A HIGH STRENGHT HEAT TREATED MEDIUM CARBON STEEL CONSISTING OF ABOUT 0.1-0.5% CARBON, ABOUT 0.3-3.0% MANGANESE, ABOUT 1.0-2.5% SILICON, ABOUT 0.5-3.0% MOLYBDEUM, AND ABOUT 1.0-3.0% COPPER, THE BALANCE BEING ESSENTIALLY IRON.
Claim 2
Dependent Claim
31 words
A HIGH STRENGHT HEAT TREATED MEDIUM CARBON STEEL CONSISTING OF ABOUT 0.1-0.5% CARBON, ABOUT 0.3-3.0% MANGANESE, ABOUT 1.0-2.5% SILICON, ABOUT 0.5-3.0% MOLYBDEUM, AND ABOUT 1.0-3.0% COPPER, THE BALANCE BEING ESSENTIALLY IRON.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |