Patents by Inventor Huan Kiak Toh
Huan Kiak Toh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 9453950Abstract: The present invention provides a method for manufacturing a photochromic article having a photochromic compound containing layer. The method includes the step of coating a casting face of at least one mold section with a photochromic host layer. The photochromic host layer is treated to minimize damage during subsequent steps, and a mold is then assembled so that it includes the mold section having the photochromic host layer. The mold is then filled with a photochromic article monomer composition and the monomer composition is subsequently cured to form a photochromic article substrate adhered to the photochromic host layer. The photochromic compound is introduced into the photochromic host layer.Type: GrantFiled: August 17, 2011Date of Patent: September 27, 2016Assignee: CARL ZEISS VISION AUSTRALIA HOLDINGS LTD.Inventors: Kathy Wai Yuen Wong, David Andrew Lewis, Fang Chen, Bohdan Grzegorz Cieslinski, Huan Kiak Toh
-
Publication number: 20120037859Abstract: The present invention provides a method for manufacturing a photochromic article having a photochromic compound containing layer. The method includes the step of coating a casting face of at least one mould section with a photochromic host layer. The photochromic host layer is treated to minimise damage during subsequent steps, and a mould is then assembled so that it includes the mould section having the photochromic host layer. The mould is then filled with a photochromic article monomer composition and the monomer composition is subsequently cured to form a photochromic article substrate adhered to the photochromic host layer. The photochromic compound is introduced into the photochromic host layer.Type: ApplicationFiled: August 17, 2011Publication date: February 16, 2012Applicant: Carl Zeiss Vision Australia Holdings Ltd.Inventors: Kathy Wai Yuen WONG, David Andrew Lewis, Fang Chen, Bohdan Grzegorz Cieslinski, Huan Kiak Toh
-
Publication number: 20070195260Abstract: Antimicrobial eyeglasses have an antimicrobial lens, wherein an antimicrobial agent can be incorporated into the lens material or into a coating material of a coating layer affixed to the lens. The antimicrobial agent is essentially non-releasably incorporated or affixed, such that the lens exhibits a persistent antimicrobial property.Type: ApplicationFiled: November 10, 2006Publication date: August 23, 2007Applicant: Microban Products CompanyInventors: Anders Olsson, Huan Kiak Toh, Fang Chen
-
Patent number: 6811830Abstract: A process for manufacture of a photochromic polymeric article comprising: providing a fluid polymerisable composition; subjecting the fluid polymerisable composition to a first curing step to provide a solid article of intermediate hardness; contacting the solid article of intermediate hardness with a photochromic substance; and subjecting the solid article of intermediate hardness to a further curing step to increase the hardness and provide a polymeric article imbibed with the photochromic substance.Type: GrantFiled: September 20, 2002Date of Patent: November 2, 2004Assignee: Sola International Holdings, Ltd.Inventors: Huan Kiak Toh, David Andrew Lewis, Raymond K. Bubner, Bohdan Grzegorz Gieslinski, Fang Chen
-
Patent number: 6551710Abstract: An ultraviolet irradiation curable primer composition for coating optical articles, in which the primer composition comprises: a dithiol or polythiol compound, and an allyl or vinyl monomer. The coating composition can further comprise photochromic dyes and additional polymerizable monomers.Type: GrantFiled: September 12, 2000Date of Patent: April 22, 2003Assignee: Sola International Holdings, Ltd.Inventors: Fang Chen, Huan Kiak Toh, Mark Christopher Fisher, Matthew John Cuthbertson
-
Publication number: 20030043447Abstract: A process for manufacture of a photochromic polymeric article comprising: providing a fluid polymerisable composition; subjecting the fluid polymerisable composition to a first curing step to provide a solid article of intermediate hardness; contacting the solid article of intermediate hardness with a photochromic substance; and subjecting the solid article of intermediate hardness to a further curing step to increase the hardness and provide a polymeric article imbibed with the photochromic substanceType: ApplicationFiled: September 20, 2002Publication date: March 6, 2003Inventors: Huan Kiak Toh, David Andrew Lewis, Raymond K. Bubner, Bohdan Grzegorz Gieslinski, Fang Chen
-
Patent number: 6391983Abstract: A crosslinkable polymeric casting composition comprises an aromatic polyvinyl monomer such as divinyl benzene, a polythiol such as pentaerythritol tetrakis-(3-mercaptopropionate), an epoxide strain-reducing agent such as hexanediol diglycidyl ether, and, optionally, a polymerizable comonomer such as polyethylene glycol dimethacrylate.Type: GrantFiled: October 22, 1999Date of Patent: May 21, 2002Assignee: Sola International Holdings, Ltd.Inventors: Ian Roger Bateman, Huan Kiak Toh, David Robert Diggins, Helena Kloubek
-
Patent number: 6313251Abstract: A cross-linkable polymeric casting composition including an effective amount of A: an acrylic or methacrylic monomer which provides high rigidity and low color dispersion (High Abbe number) to the final product; B: a di- or polythiol compound; C: a di- or polyvinyl monomer; and optionally D: a polymerizable comonomer.Type: GrantFiled: September 28, 1999Date of Patent: November 6, 2001Assignee: Sola International Holdings, Ltd.Inventors: Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins, Bohdan Grzegorz Cieslinski
-
Patent number: 6172140Abstract: A cross-linkable polymeric casting composition includes an effective amount of an acrylic or methacrylic di- or polythiol monomer of the formula (1) wherein p is an integer of 0 or 1, M or M′ are each spacer groups selected from one or more of the following formulae (i), (ii) wherein m is an integer of 0 or 1 and n is an integer of 0 to 3, with the proviso that m and n are not both equal to zero, R1R2, R3 and R4, which may be the same or different, are selected from hydrogen, alkyl or substituted alkyl of 1 to 10 carbon atoms, alkoxy or substituted alkoxy of 1 to 10 carbon atoms, or R1 or R2 is (iii) and optionally a polymerisable comonomer.Type: GrantFiled: July 27, 1999Date of Patent: January 9, 2001Assignee: Sola International Holdings LTDInventors: Huan Kiak Toh, Fang Chen, Chong Meng Kok
-
Patent number: 6166158Abstract: A cross-linkable polymeric casting composition including an effective amount ofA: an acrylic or methacrylic monomer which provides high rigidity and low colour dispersion (High Abbe number) to the final product;B: a di- or polythiol compound;C: a di- or polyvinyl monomer; and optionallyD: a polymerisable comonomer.Type: GrantFiled: July 16, 1999Date of Patent: December 26, 2000Assignee: Sola International Holdings Ltd.Inventors: Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins, Bohdan Grzegorz Cieslinski
-
Patent number: 6153663Abstract: A cross-linkage polymeric casting composition including an effective amount of a divinyl ester monomer of a bicyclic or polycyclic compound, and optionally, a minor amount of a di- or polythio compound. The specification and claims include allylic ethers withing the definition of divinyl ester, for example bisphenol fluorene diglycidyl allylic ether and bisphenol S diallyl ether.Type: GrantFiled: March 31, 1999Date of Patent: November 28, 2000Assignee: Sola International Holding, Ltd.Inventors: Fang Chen, Huan Kiak Toh
-
Patent number: 5977276Abstract: A cross-linkable polymeric casting composition including an effective amount ofA: an acrylic or methacrylic monomer which provides high rigidity and low colour dispersion (High Abbe number) to the final product;B: a di- or polythio compound;C: a di- or polyvinyl monomer; and optionallyD: a polymerisable comonomer.Type: GrantFiled: November 20, 1997Date of Patent: November 2, 1999Assignee: Sola International Holdings Ltd.Inventors: Huan Kiak Toh, Ian Roger Bateman, David Robert Diggins, Bohdan Grzegorz Cieslinski