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Pressure balanced packing
US 2,520,306 A
Filed
: 02/13/1947
Issued
: 08/29/1950
Est. Priority Date
: 02/13/1947
Status: Expired due to Term
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Current Assignee
James I. Detweiler
Original Assignee
James I. Detweiler
Inventors
Detweiler, James I.
Application Number
US02/728,364
Time in Patent Office
1,293 Days
Field of Search
US Class Current
277/448
CPC Class Codes
F16J 15/166
with means to prevent the e...
Y10S 277/909
Similar sealing structures ...
Y10S 277/91
O-ring seal
Y10S 277/926
Seal including fluid pressu...
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