Self-positioning refractory structure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Oct 2, 1990
Grant Date -
N/A
app pub date -
Oct 26, 1989
filing date -
Oct 26, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A self-positioning refractory structure having a generally cylindrical casing. A plurality of positioning refractories, a plurality of filler refractories and a plurality of wedge refractories are interlocked with respect to each other and positioned to form a structure having a curved cross section within the cylindrical casing. The positioning, filler and wedge refractories are interlocked with respect to each other. The length of each positioning refractory is greater than the length of each filler and wedge refractories thus defining an annular space between the casing wall and the refractories. Each positioning refractory has a cold end in positioning and supporting contact with an inside wall of the casing and a hot end directed toward a center of the self-positioning refractory structure.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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MERKLE ENGINEERS INC | 100 PERRY STREET GALENA IL |
International Classification(s)

- 1989 Application Filing Year
- F23M Class
- 15 Applications Filed
- 0 Patents Issued To-Date
- 0 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Materna, William R | Dubuque, IA | 7 | 33 |
# of filed Patents : 7 Total Citations : 33 |
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Patent Citation Ranking
- 10 Citation Count
- F23M Class
- 0 % this patent is cited more than
- 35 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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