BABCOCK SEMPELL AG

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6006431 Process for producing a substantially tubular housing substantially closed on all sidesExpiredJan 12, 97Dec 28, 99[B23P]
5937692 Method for manufacturing the armature housing of a slide valveExpiredNov 28, 97Aug 17, 99[B21K]
5224511 Spring-loaded safety valveExpiredOct 23, 89Jul 06, 93[F16K]

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