US3034457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Basic refractory brick
Assignee: General Refractories Co
•
Filing: 1960-11-01
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Granted: 1962-05-15
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:09
CPC Classifications
B; B28; B28B; B28B23/00; F; F27; F27D; F27D1/00; F27D1/04; F27D1/06; F27D1/08; F27D1/14; F27D1/145; F27D1/147; F27D1/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN A BASIC REFRACTORY BRICK, A BODY OF BASIC REFRACTORY, AND A FERROUS METAL SUPPORTED EMBEDDED IN THE BODY, COMPRISING A DUPLEX STRIP HAVING TWO LAYERS, ONE OF WHICH LAYERS IS OF STEEL HAVING AN ALLOY CONTENT OF LESS THAN 5% BY WEIGHT AND ANOTHER OF WHICH LAYERS IS OF CORROSION RESISTING FERROUS ALLOY.
Claim 2
Dependent Claim
54 words
IN A BASIC REFRACTORY BRICK, A BODY OF BASIC REFRACTORY, AND A FERROUS METAL SUPPORTED EMBEDDED IN THE BODY, COMPRISING A DUPLEX STRIP HAVING TWO LAYERS, ONE OF WHICH LAYERS IS OF STEEL HAVING AN ALLOY CONTENT OF LESS THAN 5% BY WEIGHT AND ANOTHER OF WHICH LAYERS IS OF CORROSION RESISTING FERROUS ALLOY.
References Cited (Backward Citations)
US2463633A
Cited
US2527063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-14 | 1965-11-13 | 1966-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-14 | 1969-11-13 | 1970-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-14 | 1973-11-13 | 1974-05-15 | $7700.00 | Window Closed / Lapsed |