US3287875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for lining furnaces
Assignee: National Steel Corp
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Filing: 1965-12-23
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Granted: 1966-11-29
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Expires: 1985-12-23
Abstract
No abstract record available.
Inventors
- 👤 Ira W Lakin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:43
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/14; E04G21/16; E04G21/22; C; C21; C21C; C21C5/00; C21C5/28; C21C5/42; C21C5/44; C21C5/441; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/53; Y10T29/53539
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A METHOD OF LINING A FURNACE HAVING A RELATIVELY SMALL ACCESS OPENING AT THE TOP AND A RELATIVELY LARGE INTERIOR SPACE TO BE LINED, COMPRISING THE STEPS OF RESTING THE LOWER END OF AN UPRIGHT COLUMN ON A BOTTOM INTERIOR SURFACE WITHIN THE SURFACE, WITH AN UPPER PORTION OF THE COLUMN PROJECTING UPWARDLY THROUGH THE ACCESS OPENING, PROVIDING AN OPERATOR''S CAB VERTICALLY MOVABLE ON AND HORIZONTALLY SWINGABLE ABOUT THE COLUMN, PROVIDING AN EXTENSIBLE AND RETRACTABLE ARM, PIVOTALLY MOUNTED FOR VERTICAL SWINGING MOVEMENT, ASSOCIATED WITH THE OPERATOR''S CAB, PROVIDING BLOCK CLAMPING MEANS PIVOTED FOR VERTICAL SWINGING MOVEMENT, ON A FREE END OF THE ARM, SUPPLYING A BLOCK OF REFRACTORY MATERIAL AT A LOCATION EXTERIOR OF THE FURNACE AND ABOVE THE ACCESS OPENING, MAINPULATING THE ARM AND CLAMPING MEANS TO PLACE THE CLAMPING MEANS IN POSITION TO GRIP THE REFRACTORY BLOCK, MANIPULATING THE CLAMPING MEANS TO GRIP THE REFRACTORY BLOCK, MANIPULATING THE ARM TO LIFT AND POSITION THR GRIPPED REFRACTORY BLOCK AT A DISTANCE FROM THE COLUMN WHICH IS LESS THAN THE DISTANCE OF THE PERIPHERY OF THE ACCESS OPENING FROM THE COLUMN,
Claim 2
Independent Claim
181 words
A METHOD OF LINING A FURNACE HAVING A RELATIVELY SMALL ACCESS OPENING AT THE TOP AND A RELATIVELY LARGE INTERIOR SPACE TO BE LINED, COMPRISING THE STEPS OF RESTING THE LOWER END OF AN UPRIGHT COLUMN ON A BOTTOM INTERIOR SURFACE WITHIN THE SURFACE, WITH AN UPPER PORTION OF THE COLUMN PROJECTING UPWARDLY THROUGH THE ACCESS OPENING, PROVIDING AN OPERATOR''S CAB VERTICALLY MOVABLE ON AND HORIZONTALLY SWINGABLE ABOUT THE COLUMN, PROVIDING AN EXTENSIBLE AND RETRACTABLE ARM, PIVOTALLY MOUNTED FOR VERTICAL SWINGING MOVEMENT, ASSOCIATED WITH THE OPERATOR''S CAB, PROVIDING BLOCK CLAMPING MEANS PIVOTED FOR VERTICAL SWINGING MOVEMENT, ON A FREE END OF THE ARM, SUPPLYING A BLOCK OF REFRACTORY MATERIAL AT A LOCATION EXTERIOR OF THE FURNACE AND ABOVE THE ACCESS OPENING, MAINPULATING THE ARM AND CLAMPING MEANS TO PLACE THE CLAMPING MEANS IN POSITION TO GRIP THE REFRACTORY BLOCK, MANIPULATING THE CLAMPING MEANS TO GRIP THE REFRACTORY BLOCK, MANIPULATING THE ARM TO LIFT AND POSITION THR GRIPPED REFRACTORY BLOCK AT A DISTANCE FROM THE COLUMN WHICH IS LESS THAN THE DISTANCE OF THE PERIPHERY OF THE ACCESS OPENING FROM THE COLUMN,
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |