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SPECTRA GROUP LTD INC

Overview
  • Total Patents
    40
About

SPECTRA GROUP LTD INC has a total of 40 patent applications. Its first patent ever was published in 1992. It filed its patents most often in United States, WIPO (World Intellectual Property Organization) and Australia. Its main competitors in its focus markets optics, machines and macromolecular chemistry and polymers are UTSUMI YOSHIYUKI, ICHIKAWA KOJI and TAKOMA TECHNOLOGY CO LTD.

Patent filings in countries

World map showing SPECTRA GROUP LTD INCs patent filings in countries

Patent filings per year

Chart showing SPECTRA GROUP LTD INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Neckers Douglas C 38
#2 Mejiritski Alexandre 13
#3 Grinevich Oleg V 12
#4 Hassoon Salah A 6
#5 Sarker Ananda M 6
#6 Shi Jianmin 5
#7 Malpert John H 4
#8 Specht Kathleen G 4
#9 Torres-Filho Afranio 4
#10 Jager Wolter F 3

Latest patents

Publication Filing date Title
US6586494B2 Radiation curable inkjet composition
US6479217B1 Method for producing selectively colorable printing plates
US6433035B1 Selectively colorable polymerizable compositions
US6309797B1 Selectively colorable polymerizable compositions
US6200646B1 Method for forming polymeric patterns, relief images and colored polymeric bodies using digital light processing technology
US6166233A Onium gallates cationic initiators
US6211262B1 Corrosion resistant, radiation curable coating
US5955002A Method for determining properties of a polymer coating or film cured by cationic polymerization
AU1565497A Photoinitiator composition containing a borate salt and a hypervalent atom-containing salt
US5998496A Photosensitive intramolecular electron transfer compounds
US5677107A Production of three-dimensional objects
US5942554A Method for forming highly colored polymeric bodies
US5717217A Method for determining thickness, degree of cure and other properties of a polymeric coating
US5639802A Cationic polymerization
US5451343A Fluorone and pyronin y derivatives
US5395862A Photooxidizable initiator composition and photosensitive materials containing the same
EP0535984A1 Production of three-dimensional objects
US5404316A Desktop digital video processing system
EP0515133A2 Fluorone and pyronin Y derivatives