US3210061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connecting apparatus for a plurality of cyclone type furnaces in series
Assignee: Individual
•
Filing: 1961-02-02
•
Granted: 1965-10-05
•
Expires: 1981-02-02
Abstract
No abstract record available.
Inventors
- 👤 Nogiwa Yukio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:35
CPC Classifications
F; F27; F27B; F27B15/00; F27B15/003; F27B15/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN A FURNACE APPARATUS FOR PROCESSING ORE COMPRISING, IN COMBINATION, A PLURALITY OF CYCLONE FURNACES EACH HAVING A TANGENTIAL GAS INLET CONDUIT AND A CENTRALLY LOCATED GAS OUTLET CONDUIT AND A COLLECTION OUTLET ASSOCIATED THEREWITH, ONE OF SAID FURNACES CONSTITUTING A MELTING FURNACE AND ANOTHER FURNACE CONSTITUTING A REDUCTION FURNACE, MEANS SUPPLYING ORE TO SAID REDUCTION FURNACE, SAID FURNACES BEING CONNECTED TO SERIES WHEREBY THE OUTLT CONDUIT OF ONE FURNACE COMMUNICATES WITH THE INLET CONDUIT OF THE ADJACENT FURNACE, MEANS SUPPLYING PRESSURIZED HOT GAS TO THE INLET CONDUIT OF SAID MELTING FURNACE, A VENTURI PUMP OPERATED BY PRESSURIZED GAS HAVING A LOW PRESSURE INLET DIRECTLY COMMUNICATING WITH THE COLLECTION OUTLET OF
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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) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |