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OLIVER UNITED FILTERS INC

Overview
  • Total Patents
    116
About

OLIVER UNITED FILTERS INC has a total of 116 patent applications. Its first patent ever was published in 1924. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets chemical engineering, machines and basic materials chemistry are PUROLATOR FILTERS NA LLC, KURITA MACHINERY MANUF and PRODUCTS UNLIMITED INC.

Patent filings in countries

World map showing OLIVER UNITED FILTERS INCs patent filings in countries
# Country Total Patents
#1 United States 81
#2 Canada 14
#3 United Kingdom 9
#4 Germany 6
#5 Finland 3
#6 France 3

Patent filings per year

Chart showing OLIVER UNITED FILTERS INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Denhard Harry W 9
#2 Sweetland Ernest J 7
#3 Hillier Gerald O 7
#4 Ackerly Jr Orville B 6
#5 Herbert Elmer H 4
#6 Flynn Edward D 4
#7 Oswald Harold F 4
#8 Ackerly Orville B Jr 3
#9 Brittain Frank W 3
#10 Evans Franklin J 3

Latest patents

Publication Filing date Title
US2698645A Paper widening machine
GB678126A Improvements in or relating to filters
US2598606A Continuous rotary drum thickener
US2595627A Ion exchange reactor
US2563205A Automatic filter valve
US2446746A Continuous rotary filter
US2548999A Continuous industrial filter
US2563183A Puddler
US2490421A Foam breaker
US2459527A Valve for overflow systems
US2472558A Rotary drum filter
US2399803A Diaphragm pump
US2430182A Process of treating oil refinery waste
GB576967A Improvements in or relating to a device for discharging cohesive solids from an endless support
GB589817A Improvements in or relating to filters
US2363840A Filter
US2395499A Continuous filter
US2377189A Continuous industrial filter
US2362231A Filter
US2352340A Filter