Irbit Research & Consulting AG

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5072952 Sealing elementExpiredOct 05, 90Dec 17, 91[F16J]
5064709 Composite part of flexible cellular material and elastic rubber materialExpiredMay 05, 89Nov 12, 91[B32B]
4980389 Polyetherimide foam precursors and foams having improved physical properties and methods of making themExpiredApr 03, 90Dec 25, 90[C08G]
4977018 Sealing elementExpiredNov 23, 88Dec 11, 90[B32B]
4867271 Acoustic insulation board consisting of foamExpiredDec 30, 87Sep 19, 89[E04B]
4839223 Fire-protective sealing elementExpiredOct 24, 88Jun 13, 89[B32B]
4837064 Transport rollerExpiredDec 30, 87Jun 06, 89[B41J]
4767655 Sealing stripExpiredDec 12, 86Aug 30, 88[B32B]
4715473 Foam acoustic absorption memberExpiredDec 11, 85Dec 29, 87[E04B]
4666768 Foam panelExpiredJul 07, 86May 19, 87[B32B]
4564550 Foam sealing tapeExpiredFeb 28, 85Jan 14, 86[A61L, B32B]

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