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Interprovincial Pipe Line
IL
Interprovincial Pipe Line
— 6 Patents
Rank
(All Time):
#87,778
of
105,732
Top 85%
1
inventors
6
Patents All Time
Patents per Year
Patents granted per year, 1989 to 1993
Bar chart with a peak of 2 patents in 1989.
peak 2
1989: 2 patents
1989
1991: 1 patents
1991
1992: 1 patents
1992
1993: 2 patents
1993
Top Inventors at Interprovincial Pipe Line
All Time
Showing
1–1
of
1
inventors
Rank
Name
Patents
1
Donald D. Savard
6
Most Valuable Patents
Patent
Est. Value
Year
Vapor plug for temporarily sealing or plugging a pipeline
$7M
1989
Method of controlling hardness of pipe weld-joints by radially inserting insulating rings prior to tempering heat-treatment
$6M
1989
Pipeline repair sleeve assembly having heat sink groove
$6M
1993
Pipeline repair sleeve assembly
$6M
1992
Temporary disintegratable plug for an open-ended oil pipeline
$5M
1993
All 100 most valuable US patents →
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