Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Reexamination Certificate
2007-12-04
2007-12-04
Lagman, Frederick L. (Department: 3673)
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
C138S097000, C138S099000, C285S016000, C406S193000
Reexamination Certificate
active
11523916
ABSTRACT:
A pipe reinforcement system for reinforcing a pipe including a pipe section having an inner and an outer elbow surface separated by a pipe opening with a plurality of ceramic tiles overlying the pipe section, each of said tiles having a generally arcuate inner surface, said plurality of tiles secured to said pipe section with said inner arcuate surface positioned adjacent to said outer elbow surface.
REFERENCES:
patent: 3833267 (1974-09-01), McCumber
patent: 4130300 (1978-12-01), Sheridan
patent: 4251170 (1981-02-01), Sheridan
patent: 4590108 (1986-05-01), Nippe
patent: 4627995 (1986-12-01), Botsolas
Allison Robert N.
Damman Patrick B.
Intellectual Property Center LLC
Lagman Frederick L.
Progressive Products, Inc.
Shaffer Arthur K.
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