Patent US2799233A successfully refreshed from Google Patents.
US2799233A
Expired / Lapsed
US
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Refractory roof
Assignee: General Refractories Co
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Filing: 1952-07-31
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Granted: 1957-07-16
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Expires: 1972-07-31
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:27
CPC Classifications
F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08; F27D1/02; F27D1/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A MELTING FURNACE REFRACTORY ROOF OF ARCH FORM HAVING A PLURALITY OF BASIC REFRACTORY ROOF BRICK OF THE CLASS CONSISTING OF MAGNESIA AND MIXTURES OF CHROMITE AND MAGNESIA CONTAINING AT LEAST 10 PERCENT MAGNESIA BY WEIGHT, AND ARRANGED SIDE BY SIDE AND END TO END WITH RADICAL JOINTS, THERE BEING A METALLIC WIRE MESH INTERPOSED BETWEEN RADIAL FACES OF SUSSCESSIVE BRICK, THE REFRACTORY OF THE SUCCESSIVE BRICK BEING IN ENGAGEMENT THROUGH THE METALLIC WIRE MESH, AND SUCCESSIVE BRICK HAVING AN OXIDIZABLE METALLIC PLATE EXTENDING THROUGH THE INTERIOR OF THE BRICK OVER A MAJOR PORTION OF THE LONGITUDINAL DIMENSION OF THE BRICK.
Claim 2
Dependent Claim
101 words
A MELTING FURNACE REFRACTORY ROOF OF ARCH FORM HAVING A PLURALITY OF BASIC REFRACTORY ROOF BRICK OF THE CLASS CONSISTING OF MAGNESIA AND MIXTURES OF CHROMITE AND MAGNESIA CONTAINING AT LEAST 10 PERCENT MAGNESIA BY WEIGHT, AND ARRANGED SIDE BY SIDE AND END TO END WITH RADICAL JOINTS, THERE BEING A METALLIC WIRE MESH INTERPOSED BETWEEN RADIAL FACES OF SUSSCESSIVE BRICK, THE REFRACTORY OF THE SUCCESSIVE BRICK BEING IN ENGAGEMENT THROUGH THE METALLIC WIRE MESH, AND SUCCESSIVE BRICK HAVING AN OXIDIZABLE METALLIC PLATE EXTENDING THROUGH THE INTERIOR OF THE BRICK OVER A MAJOR PORTION OF THE LONGITUDINAL DIMENSION OF THE BRICK.
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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) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |