Patents by Inventor Vien Van
Vien Van 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).
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Patent number: 11249251Abstract: Methods and devices that provide a variable-bandwidth optical filter with frequency tuning are disclosed. A universal variable bandwidth optical filter architecture is disclosed, based on microring resonators that can vary both operation wavelength and bandwidth with no extra complexity relative to conventional wavelength tunable filters. The filter architecture provides a universal filter design for any arbitrary shape of filter response, such as second-order, fourth-order, sixth-order, and so on. The filter characteristics—insertion loss, in-band ripple, and out-of-band rejection level—may be maintained over the bandwidth tuning range. There is no need for extra heaters to tune the filter's operating bandwidth, as the same heaters used to tune the filter frequency can be used to tune filter bandwidth. The device can be used as an add/drop filter.Type: GrantFiled: July 15, 2020Date of Patent: February 15, 2022Assignee: Huawei Technologies Co. Ltd.Inventors: Yang Ren, Vien Van, Zhiping Jiang
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Publication number: 20220019023Abstract: Methods and devices that provide a variable-bandwidth optical filter with frequency tuning are disclosed. A universal variable bandwidth optical filter architecture is disclosed, based on microring resonators that can vary both operation wavelength and bandwidth with no extra complexity relative to conventional wavelength tunable filters. The filter architecture provides a universal filter design for any arbitrary shape of filter response, such as second-order, fourth-order, sixth-order, and so on. The filter characteristics—insertion loss, in-band ripple, and out-of-band rejection level—may be maintained over the bandwidth tuning range. There is no need for extra heaters to tune the filter's operating bandwidth, as the same heaters used to tune the filter frequency can be used to tune filter bandwidth. The device can be used as an add/drop filter.Type: ApplicationFiled: July 15, 2020Publication date: January 20, 2022Inventors: Yang Ren, Vien Van, Zhiping Jiang
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Patent number: 10047231Abstract: The instant invention relates to novel tris(hydroxyphenyl)triazines coating compositions, for instance automotive coating compositions, and to novel tris(hydroxyphenyl) triazines UV-absorbers having a long wavelength sifted absorption spectrum with significant absorbance up to 420 nm. Further aspects of the invention are a UV stabilized composition containing the novel UV-absorbers, a process for the stabilization of organic materials and coatings and the use of the compounds as UV-light stabilizers for organic materials and coatings.Type: GrantFiled: May 31, 2006Date of Patent: August 14, 2018Assignee: BASF SEInventors: Thomas Vogel, Adalbert Braig, Vien Van Toan
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Patent number: 9876262Abstract: A coupling is provided for coupling non-adjacent resonators of a radio frequency filter. The coupling joins together non-adjacent resonators with a metal strip. The metal strip is physically connected to but electrically isolated from resonators located between the connected non-adjacent resonators. The metal strips include tabs the length of which may be varied. The coupling works with different resonator configurations including horizontally aligned resonators. The coupling allows for the jumping of an even number of resonators can produce zeros at high and low bands. A single coupling of this configuration enables two negative couplings.Type: GrantFiled: March 7, 2017Date of Patent: January 23, 2018Assignee: Intel CorporationInventors: Purna C. Subedi, Ian Burke, Vien Van Tran
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Patent number: 9692098Abstract: A coupling is provided for coupling non-adjacent resonators of a radio frequency filter. The coupling joins together non-adjacent resonators with a metal strip. The metal strip is physically connected to but electrically isolated from resonators located between the connected non-adjacent resonators. The metal strips include tabs the length of which may be varied. The coupling works with different resonator configurations including horizontally aligned resonators. The coupling allows for the jumping of an even number of resonators can produce zeros at high and low bands. A single coupling of this configuration enables two negative couplings.Type: GrantFiled: September 29, 2014Date of Patent: June 27, 2017Assignee: Intel CorporationInventors: Purna Subedi, Ian Burke, Vien Van Tran
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Publication number: 20170179559Abstract: A coupling is provided for coupling non-adjacent resonators of a radio frequency filter. The coupling joins together non-adjacent resonators with a metal strip. The metal strip is physically connected to but electrically isolated from resonators located between the connected non-adjacent resonators. The metal strips include tabs the length of which may be varied. The coupling works with different resonator configurations including horizontally aligned resonators. The coupling allows for the jumping of an even number of resonators can produce zeros at high and low bands. A single coupling of this configuration enables two negative couplings.Type: ApplicationFiled: March 7, 2017Publication date: June 22, 2017Inventors: Purna C. Subedi, Ian Burke, Vien Van Tran
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Publication number: 20150091672Abstract: A coupling is provided for coupling non-adjacent resonators of a radio frequency filter. The coupling joins together non-adjacent resonators with a metal strip. The metal strip is physically connected to but electrically isolated from resonators located between the connected non-adjacent resonators. The metal strips include tabs the length of which may be varied. The coupling works with different resonator configurations including horizontally aligned resonators. The coupling allows for the jumping of an even number of resonators can produce zeros at high and low bands. A single coupling of this configuration enables two negative couplings.Type: ApplicationFiled: September 29, 2014Publication date: April 2, 2015Inventors: Purna Subedi, Ian Burke, Vien Van Tran
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Publication number: 20090117394Abstract: The instant invention relates to novel tris(hydroxyphenyl) triazines coating compositions, for instance automotive coating compositions, and to novel tris(hydroxyphenyl) triazines UV-absorbers having a long wavelength shifted absorption spectrum with significant absorbance up to 420 nm. Further aspects of the invention are a UV stabilized composition containing the novel UV-absorbers, a process for the stabilization of organic materials and coatings and the use of the compounds as UV-light stabilizers for organic materials and coatings.Type: ApplicationFiled: May 31, 2006Publication date: May 7, 2009Inventors: Thomas Vogel, Adalbert Braig, Vien Van Toan
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Patent number: 7087753Abstract: Novel compounds of formula I are described wherein E corresponds to the formula or to the formula and the radicals R1, R2, R11, R22, R?22, R?33 and R?33 are as defined in claim 1. Compounds of formula I are suitable for stabilizing organic material, especially plastics materials, surface-coatings, cosmetic preparations, sun protection agents or photographic material, against damage by light, oxygen and/or heat.Type: GrantFiled: April 4, 2005Date of Patent: August 8, 2006Assignee: Ciba Specialty Chemicals Corp.Inventors: Vien Van Toan, Georges Metzger, Thomas Schäfer, Stéphane Biry, Christophe Bulliard, Dieter Reinehr, Peter Michaelis
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Publication number: 20040082606Abstract: The present invention provides novel pharmaceutically acceptable salts of the compounds of Formula (I) and Formula (Ia), as well as methods for using the pharmaceutically acceptable salts, and also provides processes for making compounds of Formula (I) and Formula (Ia), or the pharmaceutically acceptable salts thereof. Compounds of formula (I) and formula (Ia) are useful for the treatment of neurological disorders, especially migraine.Type: ApplicationFiled: June 13, 2003Publication date: April 29, 2004Inventors: Vien Van Khau, Michael Edward Letourneau, Michael John Martinelli
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Patent number: 6653484Abstract: Triazine, benzotriazole and benzophenone derivatives which are substituted or bridged with polyoxyalkylene groups, according to claim 1, and their use as UV absorbers, especially in photographic materials, in inks, including inkjet inks and printing inks, in transfer prints, in paints and varnishes, organic polymeric materials, plastics, rubber, glass, packaging materials, in sunscreens of cosmetic preparations and in skin protection compositions.Type: GrantFiled: November 8, 2001Date of Patent: November 25, 2003Assignee: Ciba Specialty Chemicals CorporationInventors: Vien Van Toan, Andreas Valet, Pascal Hayoz
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Patent number: 6495622Abstract: Compositions comprising A) a polyolefin or polyolefin copolymer, and B) a compound of the formula I wherein R1 is O or O—X—O; R2, R3, R4 and R5 independently are hydrogen, halogen, C1-C8alkyl, C1-C8alkoxy, SR10, SO2R10, phenyl, CF3, COOR11; and wherein R2 and R3 also may be OH; R6 and R7 are H or C1-C8alkyl; R8 and R9 are H, C1-C8alkyl or allyl; R10 is phenyl or C1-C12alkyl; R11 is C1-C8alkyl; C3-C50alkylene interrupted by one or more O; cyclohexyl; benzyl; allyl; X is C2-C18alkylene; C3-C12hydroxyalkylene; or a group selected from those of the formulae where D and D′ independently are a direct bond or C1-C3alkylene; and Y is O, S, SO2, or C1-C3alkylene, e.g. polyethylene films, are well stabilized against the effects of light, oxygen and heat. Some novel compounds of component B are valuable stabilizers for organic material against damage by light, oxygen and/or heat.Type: GrantFiled: November 27, 2000Date of Patent: December 17, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: David George Leppard, Vien Van Toan, Roland A. E. Winter, Michela Bonora
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Patent number: 6472550Abstract: A process for the preparation of a stabilizer mixture containing a low amount of chloride comprising a) 50-80% by weight of tetrakis(2,4-di-tert-butylphenyl)biphenylene diphosphonite and its isomers, b) 5-25% by weight of bis(2,4-di-tert-butylphenyl)biphenylene monophosphonite and its isomers, and c) 5-25% by weight of a tris(2,4-di-tert-butylphenyl) phosphite, and where the sum of components (a), (b) and (c) is not greater than 100% by weight, by reacting biphenyl under Friedel-Crafts condition with phosphorus trichloride and aluminium trichloride and by reacting the product mixture with 2,4-di-tert-butyl-phenol in the presence of a tertiary amine or an aromatic amine and a solvent, separating the formed two layers, which process comprises treating the solvent layer with water, a base and a desiccant, separating the precipitate from the solution containing the stabilizer mixture and evaporating the solvent.Type: GrantFiled: October 31, 2000Date of Patent: October 29, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Vien Van Toan, Ronald Salathé
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Publication number: 20020094320Abstract: Triazine, benzotriazole and benzophenone derivatives which are substituted or bridged with polyoxyalkylene groups, according to claim 1, and their use as UV absorbers, especially in photographic materials, in inks, including inkjet inks and printing inks, in transfer prints, in paints and varnishes, organic polymeric materials, plastics, rubber, glass, packaging materials, in sunscreens of cosmetic preparations and in skin protection compositions.Type: ApplicationFiled: November 8, 2001Publication date: July 18, 2002Inventors: Vien Van Toan, Andreas Valet, Pascal Hayoz
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Patent number: 6369267Abstract: Triazine, benzotriazole and benzophenone derivatives which are substituted or bridged with polyoxyalkylene groups, according to claim 1, and their use as UV absorbers, especially in photographic materials, in inks, including inkjet inks and printing inks, in transfer prints, in paints and varnishes, organic polymeric materials, plastics, rubber, glass, packaging materials, in sunscreens of cosmetic preparations and in skin protection compositions.Type: GrantFiled: October 4, 2000Date of Patent: April 9, 2002Assignee: Ciba Specialty Chemicals CorporationInventors: Vien Van Toan, Andreas Valet, Pascal Hayoz
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Patent number: 6284821Abstract: A description is given of compounds of the formula I in which R1 is C1-C18alkyl; C5-C12cycloalkyl; C3-C6alkenyl; phenyl; C1-C18alkyl which is substituted by phenyl, OH, C1-C18alkoxy, C5-C12cycloalkoxy, C3-C18alkenyloxy, halogen, —COOH, —COOR4, —O—CO—R5, —O—CO—O—R6, —CO—NH2, —CO—NHR7, —CO—N(R7)(R8), CN, NH2, NHR7, —N(R7)(R8), —NH—CO—R5, phenoxy, C1-C18alkyl-substituted phenoxy, phenyl-C1-C4alkoxy, C6-C15bicycloalkoxy, C6-C15bicycloalkylalkoxy, C6-C15bicycloalkenylalkoxy, or C6-C15tricycloalkoxy; C5-C12cycloalkyl which is substituted by OH, C1-C4alkyl, C2-C6alkenyl or —O—CO—R5; glycidyl; —CO—R9 or —SO2—R10; or R1 is C3-C50alkyl which is interrupted by one or more oxygen atoms and/or substituted by OH, phenoxy or C7-C18alkylphenoxy; or R1 denotes the specific polymerizable radicals indicated in claim 1; R2 is C6-C18alky1; C2-C6alkenyl; pType: GrantFiled: November 17, 2000Date of Patent: September 4, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Dietmar Hüglin, Vien Van Toan, Helmut Luther, Christophe Bulliard, Gerhard Rytz
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Patent number: 6184375Abstract: A description is given of compounds of the formula I in which R1 is C1-C18alkyl; C5-C12cycloalkyl; C3-C6alkenyl; phenyl; C1-C18alkyl which is substituted by phenyl, OH, C1-C18alkoxy, C5-C12cycloalkoxy, C3-C18alkenyloxy, halogen, —COOH, —COOR4, —O—CO—R5, —O—CO—O—R6, —CO—NH2, —CO—NHR7, —CO—N(R7)(R8), CN, NH2, NHR7, —N(R7)(R8), —NH—CO—R5, phenoxy, C1-C18alkyl-substituted phenoxy, phenyl-C1-C4alkoxy, C6-C15bicycloalkoxy, C6-C15bicycloalkylalkoxy, C6-C15bicycloalkenylalkoxy, or C6-C15tricycloalkoxy; C5-C12cycloalkyl which is substituted by OH, C1-C4alkyl, C2-C6alkenyl or —O—CO—R5; glycidyl; —CO—R9 or —SO2—R10; or R1 is C3-C50alkyl which is interrupted by one or more oxygen atoms and/or substituted by OH, phenoxy or C7-C18alkylphenoxy; or R1 denotes the specific polymerizable radicals indicated in claim 1; R2 is C6-C18alkyl; C2-C6alkenyl; pType: GrantFiled: November 19, 1997Date of Patent: February 6, 2001Assignee: Ciba Specialty Chemicals CorporationInventors: Dietmar Hüglin, Vien Van Toan, Helmut Luther, Christophe Bulliard, Gerhard Rytz
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Patent number: 6013704Abstract: There are described compounds of formula A whereinr.sub.1 and r.sub.2 are each independently of the other 0 or 1;Y.sub.1 to Y.sub.9 are each independently of the others --H, --OH, C.sub.1 -C.sub.20 alkyl, C.sub.4 -C.sub.20 cycloalkyl, C.sub.2 -C.sub.20 -alkenyl, C.sub.1 -C.sub.20 alkoxy, C.sub.4 -C.sub.12 cycloalkoxy, C.sub.2 -C.sub.20 alkenyloxy, C.sub.7 -C.sub.20 aralkyl, halogen, --C.tbd.N, C.sub.1 -C.sub.5 haloalkyl, --SO.sub.2 R', --SO.sub.3 H, --SO.sub.3 M, wherein M is an alkali metal, --COOR', --CONHR', --CONR'R", --OCOOR', --OCOR', --OCONHR', (meth)acrylamino, (meth)-acryloxy, C.sub.6 -C.sub.12 aryl; C.sub.6 -C.sub.12 aryl substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, CN and/or by halogen; C.sub.3 -C.sub.12 heteroaryl; C.sub.3 -C.sub.12 heteroaryl substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, CN and/or by halogen; or Q of formula I, and at least one substituent Y.sub.1 to Y.sub.9 must be Q ##STR1## wherein q is 0 or 1,R is a cyclic radical andR.sub.Type: GrantFiled: September 10, 1997Date of Patent: January 11, 2000Assignee: Ciba Specialty Chemicals CorporationInventors: Pascal Hayoz, Andreas Valet, Vien Van Toan
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Patent number: 5986106Abstract: A process for preparing 1H-indole-3-glyoxamides useful for inhibiting SPLA.sub.2 and novel intermediates useful in the preparation of such compounds.Type: GrantFiled: June 26, 1998Date of Patent: November 16, 1999Assignee: Eli Lilly and CompanyInventors: Vien Van Khau, Michael John Martinelli, Joseph Matthew Pawlak
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Patent number: 5959008Abstract: Compositions based on synthetic organic polymers or prepolymers are effectively stabilized against the damaging effects of light, oxygen and/or heat by addition of a compound of the formula I ##STR1## in which Z is a group of one of the formulae II or III, ##STR2## R.sub.7 and R.sub.17, independently of one another, are a radical of one of the formulae IV, V and VI ##STR3## and the remaining symbols are as defined in claim 1.Type: GrantFiled: March 21, 1997Date of Patent: September 28, 1999Assignee: Ciba Specialty Chemicals Corp.Inventors: Jean-Luc Birbaum, Vien Van Toan, Andreas Valet, Roger Meuwly