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PETRARCH SYSTEMS INC

Overview
  • Total Patents
    32
About

PETRARCH SYSTEMS INC has a total of 32 patent applications. Its first patent ever was published in 1980. It filed its patents most often in United States, Canada and EPO (European Patent Office). Its main competitors in its focus markets optics, macromolecular chemistry and polymers and organic fine chemistry are FRX POLYMERS LLC, Anhui tongchang machinery co ltd and XIE XUMING.

Patent filings in countries

World map showing PETRARCH SYSTEMS INCs patent filings in countries

Patent filings per year

Chart showing PETRARCH SYSTEMS INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Arkles Barry C 19
#2 Lewis James M 9
#3 Owens Robert A 6
#4 Blakeney Andrew Joseph 3
#5 Blakeney Andrew J 3
#6 Lewis James Marvin 3
#7 King Kevin M 2
#8 Hamon Burrell N 2
#9 Chin Roland L 2
#10 Ferguson Susan A 2

Latest patents

Publication Filing date Title
US4822722A Process of using high contrast photoresist developer with enhanced sensitivity to form positive resist image
US4824769A High contrast photoresist developer
CA1285418C Pre-exposure method for increased sensitivity in high contrast resist development
US4711820A Method of siliconization of surfaces with lower alkyl silanes
US4710449A High contrast low metal ion positive photoresist developing method using aqueous base solutions with surfactants
US4577039A Method of preparing hexamethylcyclotrisilazane
US4626583A Polysilane-siloxane oligomers and copolymers and methods of making the same
US4670372A Process of developing radiation imaged photoresist with alkaline developer solution including a carboxylated surfactant
CA1251350A High contrast photoresist developer
US4595775A N-methylhydridosilazanes, polymers thereof, methods of making same and silicon nitrides produced therefrom
US4596882A Modified silacrown ethers and methods of making same
US4550139A Mixtures of polyacrylate resins and siloxane-styrene copolymers
DE3243048A1 Sila crown ethers, modified sila crown compounds, their preparation, and their use as phase transfer catalysts
US4699991A Methods of using silacrown ethers as catalysts
US4469881A [2-(p-t-Butylphenyl)ethyl]silanes and method of making the same
US4500688A Curable silicone containing compositions and methods of making same
US4478981A Mixtures of polyacrylate resins and siloxane carbonate copolymers
US4362884A Silacrown ethers, method of making same, and use as phase-transfer catalysts
US4491669A Mixed alkoxyaminosilanes, methods of making same and vulcanizing silicons prepared therefrom
US4336395A Ethylene bridged amine functional silanes, composites using the same, and intermediates therefor