US3330652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed steel
Assignee: Brown and Sharpe Manufacturing Co
•
Filing: 1964-04-17
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Granted: 1967-07-11
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Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Norman E Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/22; C22C38/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A HIGH SPEED STEEL CONSISTING ESSENTIALLY OF ABOUT 3.98% CHROMIUM, ABOUT 1.76% TUNGSTEN, ABOUT 1.05% VANADIUM, ABOUT 8.48% MOLYBDENUM, ABOUT 3.98% COBALT, AND ABOUT .98% CARBON, AND THE BALANCE IRON WITH INCIDENTAL IMPURITIES.
Claim 2
Dependent Claim
33 words
A HIGH SPEED STEEL CONSISTING ESSENTIALLY OF ABOUT 3.98% CHROMIUM, ABOUT 1.76% TUNGSTEN, ABOUT 1.05% VANADIUM, ABOUT 8.48% MOLYBDENUM, ABOUT 3.98% COBALT, AND ABOUT .98% CARBON, AND THE BALANCE IRON WITH INCIDENTAL IMPURITIES.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |