Learn more

RICHFIELD OIL CORP

Overview
  • Total Patents
    184
About

RICHFIELD OIL CORP has a total of 184 patent applications. Its first patent ever was published in 1936. It filed its patents most often in United States, Canada and France. Its main competitors in its focus markets civil engineering, organic fine chemistry and basic materials chemistry are SHELL CANADA LTD, RECH ET DACTIVITES PETROLIERES and SHELL OIL CO.

Patent filings in countries

World map showing RICHFIELD OIL CORPs patent filings in countries
# Country Total Patents
#1 United States 117
#2 Canada 39
#3 France 10
#4 United Kingdom 10
#5 Germany 4
#6 Spain 2
#7 Belgium 1
#8 Israel 1

Patent filings per year

Chart showing RICHFIELD OIL CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Natland Manley L 30
#2 Wakefield Jr Charles E 18
#3 Himel Chester M 14
#4 Kofahl David C 9
#5 Chamberlain Richard O 7
#6 Wakefield Charles E Jr 5
#7 Daigh Harold D 5
#8 Johnstone Robert D 4
#9 Dinsmore Robert L 4
#10 Travers Jr William J 4

Latest patents

Publication Filing date Title
US3672447A Marine well drilling method and apparatus
US3285337A Well drilling method
US3332481A Method of installing submarine drilling and production head
US3291210A Drilling and production method
US3392723A Electro-pneumatically operated bed oscillator
GB1114773A Production head and method of installing same
US3521909A Remote underwater wellhead connector
US3298186A Atmospheric lpg storage tank and process
US3237617A Flame arrestor for internal combustion engines
US3279539A Well casing hanger and method for hanging same
US3268933A Tank cleaning apparatus
IL22219A Method and apparatus for coating the interior of tubing
GB1082834A Well casing hanger and method for hanging same
US3237616A Recycle valve
US3291217A Flow line pig injector
US3506069A Process for recovering petroleum utilizing a nuclear explosion
US3297537A Crude petroleum transmission system
US3246697A Apparatus including a nuclear reactor for heating injection gases
US3227229A Bit guide
US3157467A Crankcase ventilator device