U.S. Patent No. 6,056,971 (Expires July 23, 2017)
U.S. Patent No. 6,300,377 (Raj Chopra) - "Hyrdosolv" (Expires February 22, 2021)
U.S. Patent No. 6,441,050 (Raj Chopra) - "Opti-solv" (Expires August 29, 2029)
U.S. Patent No. 6,740,338 (Raj Chopra) - "Q-Nol" (Expires May, 2024)
Canadian Patent No. 2,397,447 (Raj Chopra) - "Q-Nol" (Expires January 18, 2021)
Canadian Patent No. 2,417,289 (Raj Chopra) - "Q-Nol" (Expires August 17, 2021)
U.S. Patent No. 6,861,447 (Wacker)
U.S. Patent No. 6,455,072 (3i)
Canadian Patent No. 2,236,023
![]() Overview |
![]() Li Q H |
![]() Li Q Sorb |
![]() Hydro Q Sorb |