Patent US3269828A successfully refreshed from Google Patents.
US3269828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for making deoxidized steel
Assignee: Foote Mineral Co
•
Filing: 1963-12-05
•
Granted: 1966-08-30
•
Expires: 1983-12-05
Abstract
No abstract record available.
Inventors
- 👤 Hale Paul Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:12
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN THE MANUFACTURE OF DEOXIDIZED CARBON STEEL THE IMPROVEMENT, WHEREBY INCLUSIONS RESLUTING FROM INCORPORATION OF THE DEOXIDIZING AGENT ARE REDUCED, WHICH COMPRISES THE STEP OF ADDING TO THE MOLTEN DEOXIDIZED STEEL, IN AN AMOUNT BETWEEN ABOUT 0.1 AND ABOUT 1 POUND PER TON OF STEEL, A FLUX COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 75 TO ABOUT 90% OF CALCIUM FLUORIDE, FROM ABOUT 3 TO ABOUT 8% OF SODIUM FLUORIDE AND FROM ABOUT 2 TO ABOUT 20% OF LITHIUM FLUORIDE, SAID PROPORTIONS BEING BY WEIGHT BASED ON THE COMBINED WEIGHT OF THE SAID THREE MATERIALS.
Claim 2
Dependent Claim
94 words
IN THE MANUFACTURE OF DEOXIDIZED CARBON STEEL THE IMPROVEMENT, WHEREBY INCLUSIONS RESLUTING FROM INCORPORATION OF THE DEOXIDIZING AGENT ARE REDUCED, WHICH COMPRISES THE STEP OF ADDING TO THE MOLTEN DEOXIDIZED STEEL, IN AN AMOUNT BETWEEN ABOUT 0.1 AND ABOUT 1 POUND PER TON OF STEEL, A FLUX COMPOSITION CONSISTING ESSENTIALLY OF FROM ABOUT 75 TO ABOUT 90% OF CALCIUM FLUORIDE, FROM ABOUT 3 TO ABOUT 8% OF SODIUM FLUORIDE AND FROM ABOUT 2 TO ABOUT 20% OF LITHIUM FLUORIDE, SAID PROPORTIONS BEING BY WEIGHT BASED ON THE COMBINED WEIGHT OF THE SAID THREE MATERIALS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |