PIRELLI GENERAL PLC

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5701378 Optical structures with two optical guidance pathsExpiredJun 28, 96Dec 23, 97[G02B]
5656090 Valve device and resin coating apparatus incorporating sameExpiredMar 24, 95Aug 12, 97[B05C]
5282079 Optical fibre amplifierExpiredJul 02, 92Jan 25, 94[G02B, H01S]
5151561 Electrical cable manufactureExpiredAug 06, 91Sep 29, 92[H01B]
5129571 Manufacture of metal tubesExpiredApr 11, 91Jul 14, 92[B23K]
5119984 Manufacture of metal tubesExpiredApr 11, 91Jun 09, 92[B23K]
5066516 Electrical cable manufactureExpiredMar 16, 89Nov 19, 91[C23C]
4997995 Extra-high-voltage power cableExpiredOct 13, 89Mar 05, 91[H01B]
4962994 Circular birefringent dielectric wave guideExpiredMay 31, 89Oct 16, 90[G02B]
4960837 PolyetherimidesExpiredSep 27, 88Oct 02, 90[C08G, C08F]
4938561 Optical signal amplification with coupled fibers and optical pumping energyExpiredDec 29, 88Jul 03, 90[G02B]
4925269 Optical fibre structureExpiredAug 23, 88May 15, 90[G02B]
4881793 Optical fibre attenuators and method for making sameExpiredMay 24, 88Nov 21, 89[C03C, G02B]
4842403 Sensing strain and temperatureExpiredDec 05, 88Jun 27, 89[G01J, G01B]
4758066 Round birefraction dielectric wave-guideExpiredJul 22, 86Jul 19, 88[G02B]
4728574 Electric cable with insulation of ethylene vinyl alcohol copolymer and ammonium polyphosphateExpiredSep 15, 86Mar 01, 88[B32B]
4677255 Insulating shroud and sleeve for the connection between a cable end and a terminalExpiredJan 22, 86Jun 30, 87[H02G]
4667063 Electrical cable having at least its leading end partially prepared for jointing prior to layingExpiredJan 03, 86May 19, 87[H02G]
4573251 Applying an elastic sleeve over an elongate bodyExpiredFeb 05, 85Mar 04, 86[B23P]
4492662 Manufacture of insulated electric cablesExpiredApr 28, 83Jan 08, 85[B29F]

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