1
Harry F Shuey, Wankei Wan: Asymmetric polyimide reverse osmosis membrane, method for preparation of same and use thereof for organic liquid separations. Exxon Research and Engineering Co, Joseph J Allocca, July 30, 1985: US04532041 (39 worldwide citation)

Asymmetric polyimide reverse osmosis membranes of high flux and selectivity for organic liquid separations are described. These membranes are prepared from undegraded polyimide by dissolving from 14-30 wt. % of the undegraded polymer in a dual solvent system comprising a polymer pro-solvent/anti-sol ...


2
Leonardo Millon, Wankei Wan, Mackenzie Quantz: Surgical training aids and methods of fabrication thereof. The University of Western Ontario, Hill & Schumacher, October 28, 2014: US08870576 (15 worldwide citation)

The present invention provides surgical training aids formed from hydrogels and adapted to exhibit realistic mechanical properties mimicking those of real organs. Surgical training aids are preferably fabricated by subjecting a concentration of polyvinyl alcohol to freeze-thaw cycles in a mold desig ...


3
Wankei Wan, Leonardo E Millon, Hadi Mohammadi: Anisotropic hydrogels. The University of Western Ontario, Lynn C Schumacher, Stephen W Leonard, Hill & Schumacher, June 18, 2013: US08465771 (7 worldwide citation)

The invention relates to an anisotropic hydrogel and a method of producing the anisotropic hydrogel. The hydrogel exhibiting anisotropic properties is poly(vinyl alcohol) produced by preparing a solution of poly(vinyl alcohol) with a pre-selected concentration, thermally cycling the solution by free ...


4
Wankei Wan: Modified regenerated cellulose membrane for non-aqueous separations. Exxon Research & Engineering Company, Joseph J Allocca, August 1, 1989: US04853129 (4 worldwide citation)

Regenerated cellulose membranes used for the separation of organic liquids, for example, ketone dewaxing solvents from dewaxed oil or NMP extraction solvents from extract, have their solute rejection capability enhanced by chemical modification by contacting said membrane with a bifunctional reagent ...


5
Wankei Wan, Ganesh Guhados: Nanosilver coated bacterial cellulose. Axcelon Biopolymers Corporation, Lynn C Schumacher, Steve W Leonard, Hill & Schumacher, February 5, 2013: US08367089 (3 worldwide citation)

Nanosilver coated bacterial cellulose nanofiber and a method of producing the nanosilver coated bacterial cellulose nanofiber. The nanosilver coated bacterial cellulose nanofiber is produced by preparing a suspension of bacterial cellulose fibers, oxidizing bacterial cellulose fibers; adding the thi ...


6
Xinsheng Li, Wankei Wan, Chandrakant J Panchal: Transparent bacterial cellulose nanocomposite hydrogels. Axcelon Biopolymers Corporation, Hill & Schumacher, Lynn C Schumacher, Stephen W Leonard, January 27, 2015: US08940337 (2 worldwide citation)

A transparent polymeric nanocomposite hydrogel is provided, wherein the polymeric nanocomposite hydrogel is made from a water insoluble polymer, i.e. poly(2-hydroxyethyl methacrylate) (PHEMA) or/and crosslinked PHEMA and a water insoluble nanofiber, i.e., bacterial cellulose (BC). Disclosed is a syn ...


7
Wankei Wan, Leonardo E Millon, Hadi Mohammadi: Anisotropic hydrogels. THE UNIVERSITY OF WESTERN ONTARIO, Lynn C Schumacher, Stephen W Leonard, Hill & Schumacher, August 4, 2015: US09096744 (1 worldwide citation)

Anisotropic hydrogels including poly(vinyl alcohol) and which have physical cross-links so as to form materials which exhibit anisotropic mechanical properties characteristic of soft biological tissues wherein the anisotropic hydrogel may be used for tissue reconstruction and/or replacement includin ...


8
Wankei Wan, Ganesh Guhados: Nanosilver coated bacterial cellulose. AXCELON BIOPOLYMERS CORPORATION, Lynn C Schumacher, Stephen W Leonard, Hill & Schumacher, December 1, 2015: US09200086

Nanosilver coated bacterial cellulose nanofiber and a method of producing the nanosilver coated bacterial cellulose nanofiber. The nanosilver coated bacterial cellulose nanofiber is produced by preparing a suspension of bacterial cellulose fibers, oxidizing bacterial cellulose fibers; adding the thi ...


9
Wankei Wan, Donna Padavan: Biocompatible poly (amic acid) and method of preparation thereof. Axcelon Biopolymers Corporation, Hill & Schumacher, Lynn C Schumacher, Stephen W Leonard, February 17, 2015: US08956638

A method is provided for the preparation of a poly(amic acid) in which ring opening polymerization is employed to react the monomers ethylenediaminetetraacetic dianhydride and paraphenylenediamine in an aprotic solvent. The resulting poly(amic acid) composition is suitable as a biocompatible materia ...


10
Wankei Wan, Mina Mekhail: Compositions and methods to cross link polymer fibers. Miller Thomson, July 22, 2010: US20100183699-A1

Novel compositions comprising genipin for cross-linking polymer fibers, are provided. In aspects of the invention the compositions further comprise a solvent system, wherein said solvent system comprises alcohol solvent and water. The genipin-based compositions are useful in methods for promoting th ...