US2914400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wrought machinable tool steels
Assignee: VANADIUMALLOYS STEEL Co
•
Filing: 1954-04-08
•
Granted: 1959-11-24
•
Expires: 1974-04-08
Abstract
No abstract record available.
Inventors
- 👤 George A Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:33
CPC Classifications
C; C21; C21C; C21C7/00; C22; C22C; C22C38/00; C22C38/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A HIGH SPEED STEEL CONTAINING ABOUT 0.1% TO 1% BY WEIGHT OF LEAD SULFIDE.
Claim 2
Dependent Claim
14 words
A HIGH SPEED STEEL CONTAINING ABOUT 0.1% TO 1% BY WEIGHT OF LEAD SULFIDE.
References Cited (Backward Citations)
FR709828A
Cited
US2182758A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |