Patent US597365A successfully refreshed from Google Patents.
US3396958A
Expired / Lapsed
US
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Apparatus for recovering an unburnt waste gas in an oxygen top-blowing converter
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1963-04-22
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Granted: 1968-08-13
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Expires: 1983-04-22
Abstract
No abstract record available.
Inventors
- 👤 Machara Shigeru
- 👤 Igarashi Isoji
- 👤 District Yawata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:09
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/28; C21C5/38; C21C5/40; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
AN APPARATUS FOR RECOVERING FROM AN OXYGEN TOPBLOWING CONVERTER WASTE GAS IN AN UNBURNED STATE, WHICH COMPRISES A VERTICAL HOOD ADAPTED TO BE POSITIONED IN CLOSE CONTACT WITH THE TOP PART OF THE CONVERTER AND AN OBLIQUE HOOD CONNECTED TO SAID VERTICAL HOOD, SAID OBLIQUE HOOD BEING ADAPTED TO BE CONNECTED WITH A COOLER, THE INTERIOR OF THE WALLS OF SAID HOODS HAVING WATER PIPES LINING THEM, AND A GOOD HEAT CONDUCTING GRAPHITIC REFRACTORY MATERIAL LAYER COVERING SAID WATER PIPES AND FORMING THE INSIDE SURFACE OF SAID HOODS AND BEING PRES-
Claim 2
Independent Claim
91 words
AN APPARATUS FOR RECOVERING FROM AN OXYGEN TOPBLOWING CONVERTER WASTE GAS IN AN UNBURNED STATE, WHICH COMPRISES A VERTICAL HOOD ADAPTED TO BE POSITIONED IN CLOSE CONTACT WITH THE TOP PART OF THE CONVERTER AND AN OBLIQUE HOOD CONNECTED TO SAID VERTICAL HOOD, SAID OBLIQUE HOOD BEING ADAPTED TO BE CONNECTED WITH A COOLER, THE INTERIOR OF THE WALLS OF SAID HOODS HAVING WATER PIPES LINING THEM, AND A GOOD HEAT CONDUCTING GRAPHITIC REFRACTORY MATERIAL LAYER COVERING SAID WATER PIPES AND FORMING THE INSIDE SURFACE OF SAID HOODS AND BEING PRES-
References Cited (Backward Citations)
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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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |