Vallourec
🏢 View company profile →35Patents
0Active
35Granted
36Portfolio score
Filing activity: May 20, 1974 → May 1, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4796668A | Device for protecting threadings and butt-type joint bearing surfaces of metallic tubes | Mechanical Engineering; Lighting; Heating | 128 | Expired |
| US4426105A | Joints for pipes, particularly intended for the oil industry | Mechanical Engineering; Lighting; Heating | 68 | Expired |
| US4614120A | Determination of the make-up torque for pipe joints | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4787680A | Semi-rigid axle for a vehicle | Performing Operations; Transporting | 20 | Expired |
| US4828295A | Steel tube threaded joint having an impervious device at the level of the threading | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US4700576A | Process and device for executing the screwing of a threaded joint for tubes, equipped with a stop | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4665780A | Method of machining threaded pipe-ends | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4614225A | Magnetic rotor for the continuous casting of hollow bodies | Performing Operations; Transporting | 15 | Expired |
| US4364770A | Manufacture of a composite tubular product | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4729422A | Process and apparatus for the production of hollow bodies by continuously casting in a magnetic field | Performing Operations; Transporting | 13 | Expired |
| US4708897A | Composite product having a tubular metal casing with a welt-type seam, and a core in powder form, which can be rolled up | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4828294A | Threaded joint for steel pipes containing a sealing device located at the level of the threading | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4380480A | Method of making one-piece tubular axle blanks and the produced axle blanks | Chemistry; Metallurgy | 10 | Expired |
| US4383604A | Device for the transfer of long products particularly bars or tubes | Performing Operations; Transporting | 10 | Expired |
| US4658617A | Method permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this method | Performing Operations; Transporting | 10 | Expired |
| US4326398A | Apparatus to equalize in height, by hammering, the line of welding of longitudinally welded tubes | Performing Operations; Transporting | 10 | Expired |
| US4791816A | Device for determining when a threaded tube joint with screw limiting stop is properly made up | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4486227A | Manufacture of a composite tubular product | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4641513A | Cold rolling process for tubes, by means of a Pilger rolling mill and the rolling mill for its execution | Performing Operations; Transporting | 8 | Expired |
| US4019394A | Drive device for clamp holder carriages of a continuously operating pilger mill | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4617067A | Process for the production of semi-finished articles of hard steels using a continuous casting operation | Chemistry; Metallurgy | 6 | Expired |
| US4641410A | Method and apparatus for making a joint for steel tubes | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4353238A | Method for manufacture of seamless metal tubing by continuous rolling | Performing Operations; Transporting | 5 | Expired |
| US4375160A | Manufacture of seamless steel tube | Performing Operations; Transporting | 5 | Expired |
| US4483638A | Device for fixing a piercing or expanding plug to a piercing or expanding bar | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.