US2761003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing gases from an arc furnace
Assignee: Research Corp
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Filing: 1954-04-09
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Granted: 1956-08-28
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Expires: 1974-04-09
Abstract
No abstract record available.
Inventors
- 👤 Harry L Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:27
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; F27B; F27B3/00; F27B3/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN AN ELECTRIC FURNACE INCLUDING A ROOF AND AT LEAST ONE ELECTRODE EXTENDING THROUGH A HOLDE IN SAID ROOF, MEANS FOR DISPOSING OF FUME ESCAPING FROM THE INTERIOR OF THE FURNACE COMPRISING, MEANS FORMING A COLLAR AROUND SAID ELECTRODE EXTERIORLY OF THE ROOF AND COOPERATING WITH THE ROOF TO DEFINE A PLENUM CHAMBER WITH WHICH THE OPENING BETWEEN THE ROOF AND THE ELECTRODE COMMUNICATES, AN AMBIENT AIR INLET INTO SAID CHAMBER BETWEEN SAID COLLAR AND SAID ELECTRODE, FUME DISPOSAL MEANS, CONDUIT MEANS CONNECTING SAID CHAMBER WITH SAID FUME DISPOSAL MEANS, AND MEANS COMMUNICATING WITH SAID CONDUIT MEANS MAINTAINING A PRESSURE IN SAID CHAMBER LESS THAN THE AMBIENT AIR PRESSURE.
Claim 2
Dependent Claim
109 words
IN AN ELECTRIC FURNACE INCLUDING A ROOF AND AT LEAST ONE ELECTRODE EXTENDING THROUGH A HOLDE IN SAID ROOF, MEANS FOR DISPOSING OF FUME ESCAPING FROM THE INTERIOR OF THE FURNACE COMPRISING, MEANS FORMING A COLLAR AROUND SAID ELECTRODE EXTERIORLY OF THE ROOF AND COOPERATING WITH THE ROOF TO DEFINE A PLENUM CHAMBER WITH WHICH THE OPENING BETWEEN THE ROOF AND THE ELECTRODE COMMUNICATES, AN AMBIENT AIR INLET INTO SAID CHAMBER BETWEEN SAID COLLAR AND SAID ELECTRODE, FUME DISPOSAL MEANS, CONDUIT MEANS CONNECTING SAID CHAMBER WITH SAID FUME DISPOSAL MEANS, AND MEANS COMMUNICATING WITH SAID CONDUIT MEANS MAINTAINING A PRESSURE IN SAID CHAMBER LESS THAN THE AMBIENT AIR PRESSURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |