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PROVINCIAL HOLDINGS LTD

Overview
  • Total Patents
    14
About

PROVINCIAL HOLDINGS LTD has a total of 14 patent applications. Its first patent ever was published in 1978. It filed its patents most often in United States, Canada and Finland. Its main competitors in its focus markets materials and metallurgy, environmental technology and machines are DOMINION MINING LTD, BILLITON INTELLECTUAL PTY and BHP MINERALS INT INC.

Patent filings in countries

World map showing PROVINCIAL HOLDINGS LTDs patent filings in countries
# Country Total Patents
#1 United States 4
#2 Canada 3
#3 Finland 2
#4 Australia 1
#5 EPO (European Patent Office) 1
#6 Spain 1
#7 France 1
#8 Ireland 1

Patent filings per year

Chart showing PROVINCIAL HOLDINGS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Boorman Roy S 8
#2 Salter Robert S 8
#3 Wilkomirsky Igor A E 6
#4 Salter Robert Steven 3
#5 Gilders Ross David 3
#6 Boorman Roy Slater 3
#7 Gilders Ross D 2

Latest patents

Publication Filing date Title
US4619814A Process for the recovery of non-ferrous metals from sulphide ores and concentrates
CA1203083A Process for the recovery of non-ferrous metals from sulphide ores and concentrates
US4415540A Recovery of non-ferrous metals by thermal treatment of solutions containing non-ferrous and iron sulphates
US4372782A Recovery of lead and silver from minerals and process residues
US4317803A Recovery of non-ferrous metals by thermal treatments of solutions containing non-ferrous and iron sulphates
CA1156048A Process for the recovery of lead and silver from minerals and process residues
CA1121605A Recovery of non-ferrous metals by thermal treatment of solutions containing non-ferrous and iron sulphates