US3370937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for continuous baking of powdered or granular raw materials for producing iron
Assignee: Yawata Iron and Steel Co Ltd
•
Filing: 1965-09-20
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Granted: 1968-02-27
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Expires: 1985-09-20
Abstract
No abstract record available.
Inventors
- 👤 Tsujihata Keiji
- 👤 Sawada Yasuhiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:16
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; F; F27; F27B; F27B21/00; F27B21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A PROCESS FOR THE CONTINUOUS BAKING OF POWDERED GRANULAR RAW MATERIALS FOR PRODUCING IRON COMPRISING STEPS OF CONTINUOUSLY CHARGING A POWDERED GRANULAR RAW MATERIAL INTO AN ANNULAR ROTARY FURNACE, CONTINUOUSLY FORMING A PLURALITY OF SPIRAL LAYERS OF SAID POWDERED GRANULAR MATERIAL WITH SAID CHARGING, KEEPING A NEARLY MIDDLE PART OF SAID PLURALITY OF CHARGED LAYERS AS BURNING LAYERS BY MEANS OF A DRAFT DIRECTED UPWARD FROM THE BOTTOM OF THE FURNACE WHILE SAID PLURALITY OF CHARGED LAYERS ARE MADE TO DESCEND IN ACCORDANCE WITH THE REVOLUTION OF THE FURNACE, AND CONTINUOUSLY CUTTING OUT THE BAKED MATERIAL FROM THE LAYER WHICH HAS REACHED THE BOTTOM OF THE ROTARY FURNACE AFTER BEING SUBJECT TO BURNING AND THEN COOLED WHILE DESCENDING TO SAID BOTTOM IN ACCORDANCE WITH THE ROTATION OF THE FURNACE.
Claim 2
Dependent Claim
129 words
A PROCESS FOR THE CONTINUOUS BAKING OF POWDERED GRANULAR RAW MATERIALS FOR PRODUCING IRON COMPRISING STEPS OF CONTINUOUSLY CHARGING A POWDERED GRANULAR RAW MATERIAL INTO AN ANNULAR ROTARY FURNACE, CONTINUOUSLY FORMING A PLURALITY OF SPIRAL LAYERS OF SAID POWDERED GRANULAR MATERIAL WITH SAID CHARGING, KEEPING A NEARLY MIDDLE PART OF SAID PLURALITY OF CHARGED LAYERS AS BURNING LAYERS BY MEANS OF A DRAFT DIRECTED UPWARD FROM THE BOTTOM OF THE FURNACE WHILE SAID PLURALITY OF CHARGED LAYERS ARE MADE TO DESCEND IN ACCORDANCE WITH THE REVOLUTION OF THE FURNACE, AND CONTINUOUSLY CUTTING OUT THE BAKED MATERIAL FROM THE LAYER WHICH HAS REACHED THE BOTTOM OF THE ROTARY FURNACE AFTER BEING SUBJECT TO BURNING AND THEN COOLED WHILE DESCENDING TO SAID BOTTOM IN ACCORDANCE WITH THE ROTATION OF THE FURNACE.
References Cited (Backward Citations)
US1162634A
Cited
US2403433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-26 | 1971-08-28 | 1972-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-26 | 1975-08-28 | 1976-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-26 | 1979-08-28 | 1980-02-27 | $7700.00 | Window Closed / Lapsed |