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NL INDUSTRIES INC

Overview
  • Total Patents
    2,126
About

NL INDUSTRIES INC has a total of 2,126 patent applications. Its first patent ever was published in 1952. It filed its patents most often in United States, United Kingdom and Canada. Its main competitors in its focus markets basic materials chemistry, materials and metallurgy and macromolecular chemistry and polymers are NL CHEMICALS INC, AKZO AMERICA INC and TENNECO CHEM.

Patent filings per year

Chart showing NL INDUSTRIES INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Finlayson Claude Malcolm 83
#2 Mardis Wilbur S 80
#3 Hoover Lonnie Daniel 56
#4 House Roy Francis 50
#5 Rahm Joseph A 35
#6 Herman Daniel F 34
#7 Finlayson Claude M 32
#8 Nayler Douglas W J 25
#9 Foerster George S 24
#10 House Roy F 24

Latest patents

Publication Filing date Title
US5205952A Methods for controlling airborne dissemination of lead and lead-contaminated fines during the storage and processing of lead-contaminated materials
US5248342A Methods for processing battery waste and other lead-contaminated materials
US5173277A Methods for processing battery waste and other lead-contaminated materials
US4900159A High shear mixing apparatus
US4867418A Apparatus for increasing the load handling capability of support and manipulating equipment
US4810459A Method and apparatus for determining true formation porosity from measurement-while-drilling neutron porosity measurement devices
US4791797A Density neutron self-consistent caliper
US4804051A Method of predicting and controlling the drilling trajectory in directional wells
US4758371A Process and composition for removal of mercaptans from gas streams
US4785247A Drill stem logging with electromagnetic waves and electrostatically-shielded and inductively-coupled transmitter and receiver elements
US4748849A Apparatus for dynamically measuring fluid loss characteristics
US4756363A Apparatus for releasing a perforation gun
GB8700569D0 Improvements relating to apparatus for supporting and manipulating objects
US4736204A Method and apparatus for communicating with downhole measurement-while-drilling equipment when said equipment is on the surface
US4757873A Articulated transducer pad assembly for acoustic logging tool
US4705944A Formation density logging while drilling
US4770387A Variable ram seal for blowout preventers
US4758357A Dispersible hydrophilic polymer compositions for use in viscosifying heavy brines
US4723805A Transloader
US4708204A System for determining the free point of pipe stuck in a borehole