US2779698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving machinability of steel
Assignee: United States Steel Corp
•
Filing: 1955-11-04
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Granted: 1957-01-29
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Expires: 1975-11-04
Abstract
No abstract record available.
Inventors
- 👤 Robert W Baughman
- 👤 Raymond A Grange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:19
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/18; C21D1/19; C21D1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
A METHOD OF IMPROVING THE MACHINABILITY OF FERRITIC STELLS CONTAINING LESS THAN .3% CARBON WITH THE BALANCE IRON AND OTHER ELEMENTS IN AMOUNTS WHICH DO NOT ADVERSELY AFFECT THE PROPERTIES, COMPRISING HEATING SAID STEEL AT A TEMPERATURE DETERMINED BY THE FORMULA
Claim 2
Independent Claim
41 words
A METHOD OF IMPROVING THE MACHINABILITY OF FERRITIC STELLS CONTAINING LESS THAN .3% CARBON WITH THE BALANCE IRON AND OTHER ELEMENTS IN AMOUNTS WHICH DO NOT ADVERSELY AFFECT THE PROPERTIES, COMPRISING HEATING SAID STEEL AT A TEMPERATURE DETERMINED BY THE FORMULA
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) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |