European Patent Specification 83200476.6 - Filed 01.04.83.
Henri M. Ruijten, Hans De Bree; Peter H. Van Amsterdam; Elbert Wiegers
Proprietor: Duphar International Research BV, Weesp
Pre-column for preconcentrating substances to be chromatographed as well as device for a liquid chromatography system and coupling member for said device
US Pat. 4554071 - Filed Sep 7, 1984.
Henri M. Ruijten, Hans De Bree; Peter H. Van Amsterdam; Elbert Wiegers
Assignee: Duphar International Research BV, Weesp
Device for concentrating solutions
US Patent 4697428 – Files Oct 6, 1987
Inventor(s). Henri M. Ruijten, Hans De Bree, Peter H. Van Amsterdam.
Assignee. Duphar International Research B.V..
Application www.patentstorm.us/patents/4697428-description.html
N-oxides as prodrugs of piperazine and piperidine derivatives
US Pat. 7750013 - Filed Aug 15, 2006 -
Inventor(s): Hendrik J. Koster, Peter H. Van Amsterdam, Roelof W. Feenstra, Marinus Verhage, Andrew C. McCreary, Theodorus S.M. Koopman, Mayke B. Hesselink, Gustaaf J.M. van Scharrenburg
N-oxides of pyridylmethyl -piperazine and -piperidine derivatives
US Pat. 11743049 - Filed May 1, 2007
Inventors: Marcel P.M. Van Aar, Peter H. Van Amsterdam, Gerrit A. Barf, Johan A. Bakker, Cathaline Den Besten, Arnoldus H.J. Herremans, Jan Zorgdrager
N-oxides of pyridylmethyl -piperazine and -piperidine derivatives
EP2024363 A1 – Filed April 25, 2007
Inventors: Johan Antoine Bakker, Gerrit A Barf, Cathaline den Besten, Arnoldus H.J. Herremans, Marcel P.M. van Aar, Peter H. van Amsterdam, Jan Zorgdrager.
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