Patent US3134668A successfully refreshed from Google Patents.
US3134668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid iron-based metal and method of producing same
Assignee: Individual
•
Filing: 1961-03-06
•
Granted: 1964-05-26
•
Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Robert D Pehlke
- 👤 Weinstein Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:01
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/30; C21C5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
IN A METHOD FOR PRODUCING STEEL IN A CONVERTER BY CONTACTING A METAL WITH AIR, THE STEP COMPRISING INCORPORATING INTO THE METAL MELT AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SELENIUM, TELLURIUM, AND POTASSIUM IN AN AMOUNT SUFFICIENT TO REDUCE THE RATE OF NITROGEN ABSORPTION DURING THE AIR BLOWING OF THE MELT IN THE CONVERTER.
Claim 2
Dependent Claim
56 words
IN A METHOD FOR PRODUCING STEEL IN A CONVERTER BY CONTACTING A METAL WITH AIR, THE STEP COMPRISING INCORPORATING INTO THE METAL MELT AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF SELENIUM, TELLURIUM, AND POTASSIUM IN AN AMOUNT SUFFICIENT TO REDUCE THE RATE OF NITROGEN ABSORPTION DURING THE AIR BLOWING OF THE MELT IN THE CONVERTER.
References Cited (Backward Citations)
US2009716A
Cited
US2316948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |