Learn more

EVANS ROBERT W

Overview
  • Total Patents
    40
  • GoodIP Patent Rank
    112,210
  • Filing trend
    ⇩ 33.0%
About

EVANS ROBERT W has a total of 40 patent applications. It decreased the IP activity by 33.0%. Its first patent ever was published in 1980. It filed its patents most often in United States, WIPO (World Intellectual Property Organization) and EPO (European Patent Office). Its main competitors in its focus markets civil engineering, mechanical elements and machines are CENTEK LTD, OFFSHORE ENERGY SERVICES INC and YANCHENG XINYONGJIA PETROLEUM MACHINERY MFG CO LTD.

Patent filings per year

Chart showing EVANS ROBERT Ws patent filings per year from 1900 to 2020

Focus industries

Focus technologies

Top inventors

# Name Total Patents
#1 Evans Robert W 40

Latest patents

Publication Filing date Title
US2020217161A1 Release Lugs for a Jarring Device
EP3643874A1 Release lugs for a jarring device
EP3572616A1 Release lugs for a jarring device
US2020232296A1 Release Mechanism for a Jarring Tool
US2018252064A1 Release lugs for a jarring device
US2017247968A1 Adjustable hydraulic jarring device
WO2016130308A1 Predetermined load release device for a jar
US2016237771A1 Release lugs for a jarring device
US2014251691A1 Method and apparatus for improving the efficiency of a positive displacement motor for drilling and oil or gas well
US2013168092A1 Double-acting shock damper for a downhole assembly
US2011220345A1 Dual acting locking jar
US2011083851A1 Compact jar for dislodging tools in an oil or gas well
US2010319930A1 Time-controlled release device for wireline conveyed tools
US2009020287A1 Method and apparatus for decreasing drag force of trigger mechanism
US6988551B2 Jar with adjustable trigger load
US7290604B2 Downhole tool with pressure balancing
US2006169456A1 Jar with adjustable preload
AU9506701A Downhole tool with electrical conductor
US5318139A Reduced waiting time hydraulic drilling jar
US5232060A Double-acting accelerator for use with hydraulic drilling jars