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C H DEV & SALES INC

Overview
  • Total Patents
    11
About

C H DEV & SALES INC has a total of 11 patent applications. Its first patent ever was published in 1983. It filed its patents most often in United States, Australia and Canada. Its main competitors in its focus markets chemical engineering are CARPCO RES AND ENGINEERING, FLETCHER JOHN MAURICE and ZLOBIN MIKHAIL NIKOLAEVICH.

Patent filings in countries

World map showing C H DEV & SALES INCs patent filings in countries
# Country Total Patents
#1 United States 3
#2 Australia 2
#3 Canada 2
#4 United Kingdom 2
#5 Netherlands 1
#6 South Africa 1

Patent filings per year

Chart showing C H DEV & SALES INCs patent filings per year from 1900 to 2020

Focus industries

# Industry
#1 Chemical engineering

Focus technologies

# Technology
#1 Separating solids using liquids

Top inventors

# Name Total Patents
#1 Hollingsworth Clinton A 10
#2 Clinton A Hollingsworth 1

Latest patents

Publication Filing date Title
US4822482A Hydraulic separating apparatus and method
US4807761A Hydraulic separating method and apparatus
AU2919984A Hydraulic separation
AU2919884A Hindered hydraulic separation
CA1266450A Vertical-flow hindered settling velocity classification system
US4539103A Hydraulic separating method and apparatus