Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1989-12-19
1993-04-27
Kight, III, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
524606, 524608, 528125, 528128, 528171, 528172, 528173, 528183, 528185, 528188, 439 55, C08G 6926, C08G 802, C08G 7500, C08J 6702
Patent
active
052063402
ABSTRACT:
Integrated circuit sockets for use in a burn-in test are disclosed. The IC sockets are produced by injection molding of a specific polyimide having an inherent viscosity of 0.35 to 0.65 dl/g and essentially consisting of recurring units represented by the formula (I): ##STR1## wherein X is a radical selected from the group consisting of a bond, divalent hydrocarbon having from 1 to 10 carbon atoms, etc. and R is a tetravalent radical selected from the group consisting of an aliphatic radical having two or more carbon atoms, cycloaliphatic radical, monoaromatic radical etc.
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patent: 4795798 (1989-01-01), Tamai et al.
patent: 4838799 (1989-06-01), Tonooka
patent: 4847349 (1989-07-01), Ohta et al.
Chemical Abstracts, vol. 77, No. 12, 18 Sep. 1972, p. 51, Abstract No. 7617x, "Materials for High Temperature Integrated Circuit Testing", pp. 86-92.
Koga Nobuhito
Morikawa Shuithi
Nagahiro Taizo
Nakakura Toshiyuki
Tsutsumi Toshihiko
Kight III John
Mitsui Toatsu Chemicals Inc.
Mosley T.
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