Patent US3326675A successfully refreshed from Google Patents.
US3326675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy steels
Assignee: National Research Development Corp UK
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Filing: 1964-05-18
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Granted: 1967-06-20
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneford Arthur Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:54
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/16; C22C38/04; C22C38/06; C22C38/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A MEDIUM CARBON STEEL CONSISTING ESSENTIALLY OF ABOUT 0.15 TO 0.5% CARBON, ABOUT 0.25 TO 3% MANGANESE, ABOUT 1 TO 2.5% SILICON, ABOUT 0.5 TO 2% ALUMINUM, ABOUT 0.5 TO 3% MOLYBDENUM, ABOUT 1-3% COPPER AND ABOUT 0.2 TO 1% VANADIUM, THE REMAINDER BEING ESSENTIALLY IRON.
Claim 2
Independent Claim
46 words
A MEDIUM CARBON STEEL CONSISTING ESSENTIALLY OF ABOUT 0.15 TO 0.5% CARBON, ABOUT 0.25 TO 3% MANGANESE, ABOUT 1 TO 2.5% SILICON, ABOUT 0.5 TO 2% ALUMINUM, ABOUT 0.5 TO 3% MOLYBDENUM, ABOUT 1-3% COPPER AND ABOUT 0.2 TO 1% VANADIUM, THE REMAINDER 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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |