US2587793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of steel
Assignee: Individual
•
Filing: 1949-07-19
•
Granted: 1952-03-04
•
Expires: 1969-07-19
Abstract
No abstract record available.
Inventors
- 👤 Waldron Frederic Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:38
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD OF EXTRACTING GASES THAT ARE OCCLUDED IN MOLTEN STEEL WHICH COMPRISES CONTINUOUSLY FLOWING SUCH MOLTEN STEEL INTO THE BOTTOM OF AN ENLARGED CHAMBER WHICH IS MAINTAINED UNDER VACUUM, CONTINUOUSLY AND UNRESTRICTEDLY FLOWING THE MOLTEN STEEL THROUGH SAID CHAMBER WHILE IT RISES THEREIN TO A SUBSTANTIAL HEIGHT DUE TO THE VACUUM IN SAID CHAMBER WHEREBY THE OCCLUDED GASES ARE SEPARATED FROM THE STEEL AND ARE WITHDRAWN FROM SAID CHAMBER BY A GAS EXTRACTION APPLIANCE AND WITH DRAWING THE DEGASIFIED STEEL FROM A POINT AT THE BOTTOM OF SAID CHAMBER INTO A CHAMBER AT ATMOSPHERE
Claim 2
Independent Claim
95 words
A METHOD OF EXTRACTING GASES THAT ARE OCCLUDED IN MOLTEN STEEL WHICH COMPRISES CONTINUOUSLY FLOWING SUCH MOLTEN STEEL INTO THE BOTTOM OF AN ENLARGED CHAMBER WHICH IS MAINTAINED UNDER VACUUM, CONTINUOUSLY AND UNRESTRICTEDLY FLOWING THE MOLTEN STEEL THROUGH SAID CHAMBER WHILE IT RISES THEREIN TO A SUBSTANTIAL HEIGHT DUE TO THE VACUUM IN SAID CHAMBER WHEREBY THE OCCLUDED GASES ARE SEPARATED FROM THE STEEL AND ARE WITHDRAWN FROM SAID CHAMBER BY A GAS EXTRACTION APPLIANCE AND WITH DRAWING THE DEGASIFIED STEEL FROM A POINT AT THE BOTTOM OF SAID CHAMBER INTO A CHAMBER AT ATMOSPHERE
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |