US2736650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low alloy high speed steel
Assignee: Firth Sterling Inc
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Filing: 1953-06-08
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Granted: 1956-02-28
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Expires: 1973-06-08
Abstract
No abstract record available.
Inventors
- 👤 Leonard C Grimshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:48
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/24; C22C38/22; C22C38/02; C22C38/04; C22C38/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A LOW ALLOY, HIGH SPEED STEEL CONSISTING ESSENTIALLY OF 4.79 TO 5.97 ATOMIC PERCENT CARBON, 3.70 TO 4.80 ATOMIC PERCENT CHRONIUM, 3.98 TO 4.86 ATOMIC PERCENT VANADIUM 1.25 TO 3.42 ATOMIC PERCENT MOLYBDENUM, AND 0 TO 1.05 ATOMIC PERCENT TUNGSTEN, THE BALANCE BEING SUBSTANTIALLY ALL IRON, THE STEEL COMPLYING WITH RULE 1 CT-(CV+CM)=-0.10 TO -0.40 ATOMIC PERCENT AND ALSO COMPLYING WITH RULE 2
Claim 2
Dependent Claim
63 words
A LOW ALLOY, HIGH SPEED STEEL CONSISTING ESSENTIALLY OF 4.79 TO 5.97 ATOMIC PERCENT CARBON, 3.70 TO 4.80 ATOMIC PERCENT CHRONIUM, 3.98 TO 4.86 ATOMIC PERCENT VANADIUM 1.25 TO 3.42 ATOMIC PERCENT MOLYBDENUM, AND 0 TO 1.05 ATOMIC PERCENT TUNGSTEN, THE BALANCE BEING SUBSTANTIALLY ALL IRON, THE STEEL COMPLYING WITH RULE 1 CT-(CV+CM)=-0.10 TO -0.40 ATOMIC PERCENT AND ALSO COMPLYING WITH RULE 2
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) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |