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US3134835A
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Apparatus for recovering waste gas from oxygen top blowing converter in unburned state
Assignee: Yawata Iron and Steel Co Ltd
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Filing: 1960-06-03
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Granted: 1964-05-26
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Expires: 1980-06-03
Abstract
No abstract record available.
Inventors
- 👤 Okaniwa Keiji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:09
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
45 words
IN AN APPARATUS FOR CONDUCTING WASTE GASES AWAY FROM AN OXYGEN TOP BLOWING CONVERTER TO A RECOVERY APPARATUS, SAID CONDUCTING APPARATUS HAVING A GAS COOLING MECHANISM CONSISTING OF A FIRST FLUE AND A SECOND FLUE CONNECTED ONLY AT THE TOPS THEREOF, AN EXHAUST VALVE AT
Claim 2
Dependent Claim
45 words
IN AN APPARATUS FOR CONDUCTING WASTE GASES AWAY FROM AN OXYGEN TOP BLOWING CONVERTER TO A RECOVERY APPARATUS, SAID CONDUCTING APPARATUS HAVING A GAS COOLING MECHANISM CONSISTING OF A FIRST FLUE AND A SECOND FLUE CONNECTED ONLY AT THE TOPS THEREOF, AN EXHAUST VALVE AT
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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) | 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 |