US3203788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free machining steels of improved transverse mechanical properties and method of making same
Assignee: Individual
•
Filing: 1961-09-27
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Granted: 1965-08-31
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Gustad P Contractor
- 👤 David E C King
- 👤 Robert J Mcclure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:27
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/60; C21; C21C; C21C7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
A METHOD OF PRODUCING A FREE MACHINING RESULPHURIZED STEEL WHICH COMPRISES ADDING URANIUM WITH SULPHUR TO THE STEEL MELT IN A PERCENTAGE THEREOF APPROXIMATELY 1 TO 9 TIMES THAT OF SULPHUR PRESENT TO REACT WITH SUBSTANTIALLY ALL OF THE SULPHUR PRESENT AND FORM URANIUM SULPHIDES.
Claim 2
Independent Claim
45 words
A METHOD OF PRODUCING A FREE MACHINING RESULPHURIZED STEEL WHICH COMPRISES ADDING URANIUM WITH SULPHUR TO THE STEEL MELT IN A PERCENTAGE THEREOF APPROXIMATELY 1 TO 9 TIMES THAT OF SULPHUR PRESENT TO REACT WITH SUBSTANTIALLY ALL OF THE SULPHUR PRESENT AND FORM URANIUM SULPHIDES.
References Cited (Backward Citations)
FR720008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |