Patents by Inventor Omar Farooq

Omar Farooq 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: 5688603
    Abstract: A non-crosslinked composition suitable for coating onto an ink-jet recording sheet comprising.a) at least one nonionic fluorocarbon surfactant,b) at least one alkanolamine metal chelate wherein said metal is selected from the group consisting of titanium, zirconium and aluminum, andc) at least one polymer selected from the group consisting of hydroxycellulose and substituted hydroxycellulose polymers,such composition being crosslinkable when subjected to temperatures of at least about 90.degree. C.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: November 18, 1997
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Mohammed Iqbal, Armin J. Paff, Donald J. Williams, Omar Farooq, David W. Tweeten
  • Patent number: 5686602
    Abstract: A cellulose polymer network crosslinked with metal ions selected from the group consisting of: Al.sup.+3, Zr.sup.+4, and Ti.sup.+4, the crosslinked cellulose polymer network having incorporated therein a colloidal sol containing metal oxide-hydroxide particles wherein the metal is Al, Zr, or Ti. The inventive material is optically clear and can be used to cast microporous films, either supported or unsupported, which are useful as coatings on ink jet recording materials.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: November 11, 1997
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: Omar Farooq, David W. Tweeten, Mohammad Iqbal, Subodh K. Kulkarni
  • Patent number: 5589269
    Abstract: An improved ink-receptive sheet comprising a substrate bearing on at least one major surface thereof an ink-receptive layer which comprises at least one ink receptive polymer and an effective amount of polymeric mordant having the general structure: ##STR1## wherein A is selected from the group consisting of a COO-alkylene group having from 1 to about 5 carbon atoms, a CONH-alkylene group having from 1 to about 5 carbon atoms, --COO--(CH.sub.2 CH.sub.2 O).sub.n --CH.sub.2 --, --CONH--(CH.sub.2 CH.sub.2 O).sub.n --CH.sub.2 -- and .paren open-st.CH.sub.2 CH.sub.2 NH.sub.2 Cl.paren close-st.n, wherein n is from 1 to about 5;E and D are independently selected from the group consisting of alkyl group having from 1 to about 5 carbon atoms;or A, E, D and N are combined to form a heterocyclic compound selected from the group consisting of ##STR2## R.sub.1 and R.sub.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: December 31, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Mahfuza B. Ali, Omar Farooq, Mohammed Iqbal, Alan G. Miller
  • Patent number: 5484693
    Abstract: Polymeric film bases at least one side of which is coated with an antistatic layer comprising the reaction product of (a) a water-soluble, electrically conductive polymer containing carboxylic groups and (b) a polyfunctional epoxide crosslinking agent, and photographic elements comprising said film bases, wherein said conductive polymer is a copolymer of a water soluble salt of styrene sulfonic acid and maleic acid having a weight average molecular weight of 100,000 to 350,000 and a water soluble salt of styrene sulfonic acid to maleic acid molar ratio of at least 2:1 up to 9:1.
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: January 16, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Alberto Valsecchi, Omar Farooq
  • Patent number: 5403955
    Abstract: Novel mordants based upon a polyethyleneimine backbone and either pendant phosphonium or quaternized-nitrogen compounds are disclosed. The mordants find use in stopping or controlling ink-bleeding into ink-jet receptors and photographic films.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: April 4, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Omar Farooq
  • Patent number: 5380923
    Abstract: Polymeric triarylsulfonium salts are provided having a repeating structural unit with the formula: ##STR1## where R represents a substituted or unsubstituted aryl group, X.sup.- represents a non-nucleophilic anion, n represents an integer greater than or equal to 0 and p represents an integer greater than or equal to 2 and may be prepared by combining (a) an arylbis(p-fluorophenyl)substituted sulfonium salt with a bis(trimethylsilylated)dithiol in a polar aprotic solvent.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: January 10, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Bradford B. Wright, Omar Farooq, Robert J. DeVoe
  • Patent number: 5358843
    Abstract: Photothermographic elements containing image-forming emulsions with photothermographically useful compounds (e.g., stabilizers, toners, activators, developers, etc.) which are blocked with silyl groups, but become deblocked in the presence of a source of fluoride ion.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: October 25, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Kumars Sakizadeh, Sharon M. Simpson, Omar Farooq, Sam Kalousdian
  • Patent number: 5354813
    Abstract: Novel classes of polymeric mordants based upon poly(vinylpyridine), poly(N-vinylimidazoles), and poly(meth)acrylates are disclosed. The polymeric mordants contain N-heterocycles which are N-quaternized by different types of alkylated hydrazones, semicarbazones, and multiple-quaternized alkylated salts serving as pendant groups.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: October 11, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Omar Farooq, Mahfuza B. Ali
  • Patent number: 5342688
    Abstract: An improved ink-receptive sheet comprising a transparent substrate bearing on at least one major surface thereof an ink-receptive layer which comprises at least one imaging polymer and an effective amount of polymeric mordant having the general structure: ##STR1## wherein A is selected from the group consisting of a COO-alkylene group having from about 1 to about 5 carbon atoms, a CONH-alkylene group having from about 1 to about 5 carbon atoms, --COO--(CH.sub.2 CH.sub.2 O)n--CH.sub.2 -- and --CONH-- (CH.sub.2 CH.sub.2 O)n--CH.sub.2 --, wherein n is from about 1 to about 5;B and D are independently selected from the group consisting of alkyl group having from about 1 to about 5 carbon atoms;or A, B, D and N are combined to form a heterocyclic compound selected from the group consisting of ##STR2## R.sub.1 and R.sub.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: August 30, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jonathon P. Kitchin, Alan G. Miller, Mahfuza B. Ali, Omar Farooq
  • Patent number: 5124417
    Abstract: Disclosed are novel compounds which are useful as initiators for cationically polymerizable monomers. The novel compounds comprise a carbon containing cation (e.g., trimethyloxonium) which is capable of initiating cationic polymerization and a non-nucleophilic counterion which is an at least partially fluorinated hydrocarbylsulfonato metallate (e.g. perfluoroethylsulfonato-aluminate). The disclosed initiators are capable of initiating the cationic polymerization of a wide variety of monomers such as epoxides, tetrahydrofuans, oxazolines, vinyls, lactones, and the like.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: June 23, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Omar Farooq
  • Patent number: 5084586
    Abstract: Disclosed are novel compounds which are useful as initiators for cationically polymerizable monomers. The novel compounds comprise a carbon containing cation (e.g., trimethyloxonium) which is capable of initiating cationic polymerization and a non-nucleophilic counterion which is an at least partially fluorinated hydrocarbylsulfonato metallate (e.g. perfluoroethylsulfonato-aluminate). The disclosed initiators are capable of initiating the cationic polymerization of a wide variety of monomers such as epoxides, tetrahydrofuans, oxazolines, vinyls, lactones, and the like.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: January 28, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Omar Farooq