Assignee
VALLOUREC
FR·38 granted patents·1,127 citations·filing 1974–1989
Top patents by PatentIndex Score
38 records- 0198US4413395AMethod for fixing a tube by expansionVALLOUREC·Filed 1981·Granted Nov 8, 1983·180 cites·4 claims
- 0294US4641513ACold rolling process for tubes, by means of a Pilger rolling mill and the rolling mill for its executionVALLOUREC·Filed 1984·Granted Feb 10, 1987·29 cites·5 claims
- 0392US4426105AJoints for pipes, particularly intended for the oil industryVALLOUREC·Filed 1981·Granted Jan 17, 1984·116 cites·8 claims
- 0489US4796668ADevice for protecting threadings and butt-type joint bearing surfaces of metallic tubesVALLOUREC·Filed 1984·Granted Jan 10, 1989·227 cites·12 claims
- 0587US4729422AProcess and apparatus for the production of hollow bodies by continuously casting in a magnetic fieldVALLOUREC·Filed 1985·Granted Mar 8, 1988·21 cites·5 claims
- 0685US4614225AMagnetic rotor for the continuous casting of hollow bodiesVALLOUREC·Filed 1983·Granted Sep 30, 1986·21 cites·15 claims
- 0784US4373750AJoint for pipe intended for petroleum industryVALLOUREC·Filed 1980·Granted Feb 15, 1983·87 cites·11 claims
- 0880US4658617AMethod permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this methodVALLOUREC·Filed 1985·Granted Apr 21, 1987·16 cites·5 claims
- 0978US4364770AManufacture of a composite tubular productVALLOUREC·Filed 1981·Granted Dec 21, 1982·26 cites·13 claims
- 1075US4787680ASemi-rigid axle for a vehicleVALLOUREC·Filed 1986·Granted Nov 29, 1988·45 cites·10 claims
- 1169US4828295ASteel tube threaded joint having an impervious device at the level of the threadingVALLOUREC·Filed 1986·Granted May 9, 1989·35 cites·2 claims
- 1267US4708897AComposite product having a tubular metal casing with a welt-type seam, and a core in powder form, which can be rolled upVALLOUREC·Filed 1984·Granted Nov 24, 1987·18 cites·9 claims
- 1366US4614120ADetermination of the make-up torque for pipe jointsVALLOUREC·Filed 1985·Granted Sep 30, 1986·43 cites·10 claims
- 1465US4380480AMethod of making one-piece tubular axle blanks and the produced axle blanksVALLOUREC·Filed 1981·Granted Apr 19, 1983·26 cites·12 claims
- 1561US4665780AMethod of machining threaded pipe-endsVALLOUREC·Filed 1985·Granted May 19, 1987·20 cites·8 claims
- 1660US4326398AApparatus to equalize in height, by hammering, the line of welding of longitudinally welded tubesVALLOUREC·Filed 1979·Granted Apr 27, 1982·13 cites·7 claims
- 1759US4531972AMethod for the fabrication of steels with high machinabilityVALLOUREC·Filed 1983·Granted Jul 30, 1985·6 cites·12 claims
- 1859US4486227AManufacture of a composite tubular productVALLOUREC·Filed 1982·Granted Dec 4, 1984·14 cites·8 claims
- 1958US4700576AProcess and device for executing the screwing of a threaded joint for tubes, equipped with a stopVALLOUREC·Filed 1985·Granted Oct 20, 1987·24 cites·6 claims
- 2058US4617067AProcess for the production of semi-finished articles of hard steels using a continuous casting operationVALLOUREC·Filed 1981·Granted Oct 14, 1986·10 cites·11 claims
- 2157US4828294AThreaded joint for steel pipes containing a sealing device located at the level of the threadingVALLOUREC·Filed 1986·Granted May 9, 1989·24 cites·9 claims
- 2254US4375160AManufacture of seamless steel tubeVALLOUREC·Filed 1980·Granted Mar 1, 1983·17 cites·3 claims
- 2349US4019394ADrive device for clamp holder carriages of a continuously operating pilger millVALLOUREC·Filed 1974·Granted Apr 26, 1977·7 cites·7 claims
- 2448US4791816ADevice for determining when a threaded tube joint with screw limiting stop is properly made upVALLOUREC·Filed 1987·Granted Dec 20, 1988·16 cites·3 claims
- 2548US4383604ADevice for the transfer of long products particularly bars or tubesVALLOUREC·Filed 1980·Granted May 17, 1983·15 cites·11 claims
- 2643US4641410AMethod and apparatus for making a joint for steel tubesVALLOUREC·Filed 1985·Granted Feb 10, 1987·10 cites·2 claims
- 2742US4713955AMethod permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this methodVALLOUREC·Filed 1986·Granted Dec 22, 1987·4 cites·5 claims
- 2841US4906292AComposite article having a tubular sheath containing a compacted material, for the treatment of liquid metals, and process for the production of said articleVALLOUREC·Filed 1988·Granted Mar 6, 1990·4 cites·37 claims
- 2940US4974660AProcess and apparatus for the production of hollow bodies by continuously casting in a magnetic fieldVALLOUREC·Filed 1989·Granted Dec 4, 1990·3 cites·14 claims
- 3039US4816068AComposite article having a tubular sheath containing a compacted material, for the treatment of liquid metals, and process for the production of said articleVALLOUREC·Filed 1987·Granted Mar 28, 1989·6 cites·17 claims
- 3138US4395897ARolling head support assembly for a rolling millVALLOUREC·Filed 1981·Granted Aug 2, 1983·5 cites·5 claims
- 3238US4353238AMethod for manufacture of seamless metal tubing by continuous rollingVALLOUREC·Filed 1981·Granted Oct 12, 1982·7 cites·5 claims
- 3336US4665734AMethod and installation for selective detection of defects in a workpieceVALLOUREC·Filed 1985·Granted May 19, 1987·13 cites·15 claims
- 3432US4515020AMethod and apparatus for ensuring correct thread make-up of a pipejointVALLOUREC·Filed 1983·Granted May 7, 1985·3 cites·6 claims
- 3531US4555265AMethod of treating steel with calcium, to obtain a steel well adapted to cold forming, with a low silicon contentVALLOUREC·Filed 1984·Granted Nov 26, 1985·1 cites·11 claims
- 3627US4483638ADevice for fixing a piercing or expanding plug to a piercing or expanding barVALLOUREC·Filed 1981·Granted Nov 20, 1984·7 cites·6 claims
- 3720US4373703ADevice for rapidly cooling metal tubesVALLOUREC·Filed 1982·Granted Feb 15, 1983·3 cites·16 claims
- 3818US4691791AKnurled drill stemVALLOUREC·Filed 1984·Granted Sep 8, 1987·5 cites·8 claims
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