Patents by Inventor Dave Narasimhan
Dave Narasimhan 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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Publication number: 20090314215Abstract: An odor control additive present in a litter formulation provides release of fragrance or odor masking scent only when litter is used by a cat or other animal within a litter box. The odor control additive comprises a plurality of fragrance scent microcapsules that contain fragrance scent oil. This central, fragrance scent oil is encapsulated in a microcapsule cell wall, which prevents evaporation of the fragrance scent oil and prevents overpowering of litter smell in a closed room resembling an unscented litter composition. When cat or animal enters the litter box, a load is applied to the fragrance scent microcapsules, which readily breaks releasing the fragrance contained therein. The fragrance scent microcapsule cell walls also degrade by swelling and degradation when wet by animal urine thereby releasing fragrance. Fragrance evaporating from the ruptured microcapsules provides odor control and a pleasant scent.Type: ApplicationFiled: August 24, 2009Publication date: December 24, 2009Inventors: Marni Markell Hurwitz, Dave Narasimhan, Ernest D. Buff
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Publication number: 20090272384Abstract: A synthetic polyisoprene latex emulsion has pre-vulcanization composition and post vulcanization composition. The pre-vulcanization composition comprises soluble sulfur with high S8 ring structure that is catalytically broken by a zinc dithiocarbamate. Surfactants present in the pre-vulcanization composition wets synthetic polyisoprene particles and permeates small sized sulfur and accelerator molecules into the interior of these particles thereby pre-vulcanizing the particles. The degree of pre-vulcanization is verified by isopropanol index test. The latex emulsion has post-vulcanization composition with accelerators that crosslink inter-particle region during post vulcanization cure cycle. The dipped synthetic polyisoprene article is substantially uniformly cured both in the inter-particle and intra-particle regions and reliably exhibits high cross link density, uniform distribution of double bonds in TEM and zinc segregation at the boundaries or original particles by electron microprobe analysis.Type: ApplicationFiled: August 19, 2008Publication date: November 5, 2009Applicant: Ansell Healthcare Products LLCInventors: David M. Lucas, Sugath Amarasekera, Dave Narasimhan, Adeline Ai Lin Kung
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Publication number: 20090183296Abstract: A flexible cut resistant hydrocarbon flash fire resistant latex glove article is provided, having a flame resistant cut resistant liner and a flame resistant oil resistant polychloroprene polymeric latex coating. The knitted cut resistant fire resistant liner has is made from a composite yarn having a fiberglass core and optionally including a steel fiber. The core has a cushioning core sheath formed by ring-spinning of microdenier staple cut resistant fibers of, for example, para-aramid, and Staple modacrylic fibers can be included with the staple para-aramid fibers. Two wraps of continuous yarns of polyester, para-aramid, or both at a wrap density such that the wraps do not cover the core sheath in its entirety. In the absence of steel fiber, the cut resistant hydrocarbon flash fire resistant glove exhibits good electrical insulation characteristics even with sweat generated from hand preventing short circuit of electrical circuits.Type: ApplicationFiled: January 20, 2009Publication date: July 23, 2009Applicant: Ansell Healthcare Products LLCInventors: Fred Hardee, Gopinath Radhakrishnan, Marco Carrillo, Dave Narasimhan, Cherilyn N. Nelson
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Patent number: 7555921Abstract: A knitted glove made by creating each of the at least fifteen sections using a separate knitting course on a flat knitting machine providing varying stitch dimensions with one or two yarns in one or more sections. Custom stretch characteristics can be provided using one or two yarns providing a tight glove that provides flexibility and ease of movement. The varying stitch dimension is achieved by 1) varying the depth of penetration of the knitting needle into fabric being knitted by a computer program, 2) adjusting the tension of yarn between a pinch roll and knitting head by a mechanism controlled by a computer and/or 3) casting off or picking up additional stitches in a course. The glove includes four finger components, a thumb component, two palm components, and a wrist component. A padded cuff section can be added to the wrist component for comfort.Type: GrantFiled: September 12, 2008Date of Patent: July 7, 2009Assignee: Ansell Healthcare Products LLCInventors: Eric Thompson, Jeffrey C. Moreland, Gerardo Rodriguez Garay, Norberto Hector Perales Solis, Dave Narasimhan
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Patent number: 7549396Abstract: A breakable odor control additive provides release of fragrance or odor masking scent when present in a litter formulation that is used by a cat or other animal within a litter box. The odor control additive comprises a plurality of fragrant-scented balls. Each of the balls has a central, compressible, porous, open-celled substrate, which is saturated with a fragrant scent. This central, fragrance-saturated substrate is coated with a barrier coating comprising soda ash, which prevents evaporation of the fragrance and protects the substrate against deterioration by urine and other contaminants deposited on the litter when cat or animal enters the litter box, a load is applied to the fragrant-scented balls. The barrier coating breaks, exposing the fragrant coated substrate, while the soda ash neutralizes urine acid and retards odor development fragrance evaporating from the substrate provides odor control and a pleasant scent.Type: GrantFiled: April 21, 2006Date of Patent: June 23, 2009Assignee: I DID IT, Inc.Inventors: Marni Markell Hurwitz, Dave Narasimhan, Ernest D. Buff
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Publication number: 20090107513Abstract: Condoms having an elastomeric layer and coating containing an anhydrous warming lubricant and at least one or more ingredients dispersed therein, the coating being disposed on one or both surfaces are provided. The ingredients disposed on the elastomeric layer can be solid particles or encapsulated ingredients that are insoluble in the anhydrous warming lubricant and soluble in water. Methods of producing and using these condoms are also provided.Type: ApplicationFiled: October 23, 2008Publication date: April 30, 2009Applicant: ANSELL HEALTHCARE PRODUCTS LLCInventors: Michael S. Zedalis, Beng Sim Chuah, David M. Lucas, Angela Mitiko Shiokawa, Jose R. Siqueira, Dave Narasimhan
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Publication number: 20090077713Abstract: A cut resistant chemical handling glove that is flexible and lightweight comprises a cured, liquid-impervious polymeric latex shell. A tacky acrylic adhesive with low shear strength can be used. A cut resistant liner is slipped on the tacky adhesive coating and is infiltrated with a polymeric latex coating and cured to integrally attach the cut resistant liner with the cured polymeric coating. When the latex glove is worn on a hand and a cutting edge, such as a knife edge, contacts the glove, a crease is formed due to slip at the tacky adhesive-cut resistant liner interface creating a geometry that reduces cut stress intensity at the knife-edge thereby increasing the cut resistance of the glove. Processes for making and using these gloves are also described.Type: ApplicationFiled: August 20, 2008Publication date: March 26, 2009Applicant: Ansell Healthcare Products LLCInventors: Paul Saunders, Michael Flather, Dave Narasimhan
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Publication number: 20090055992Abstract: Lightweight robust thin flexible latex gloves having areas of reinforcement at areas of high stretch and/or movement are provided. Gloves comprise a knitted liner having a plurality of stitches made from a first yarn having a denier 221 or less, the knitted liner comprising a plurality of finger components, a thumb component, and a palm component; and at least one reinforcement section located at a base of at least one finger component, at a base of the thumb component, in the palm component, or combinations thereof, and a polymeric latex coating. Reinforcement sections can be formed by plaiting, using yarn of a heavier denier, and/or forming Jacquard or transfer stitches. The liner can be knitted using with 70 to 221 denier nylon 66 multi-filament yarn. Methods of making and using the gloves are also provided.Type: ApplicationFiled: September 4, 2007Publication date: March 5, 2009Inventors: Eric Thompson, Dave Narasimhan, Jeffrey C. Moreland, Hafsah binti Mohd. Ghazaly
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Publication number: 20090044571Abstract: A knitted glove made by creating each of the at least fifteen sections using a separate knitting course on a flat knitting machine providing varying stitch dimensions with one or two yarns in one or more sections. Custom stretch characteristics can be provided using one or two yarns providing a tight glove that provides flexibility and ease of movement. The varying stitch dimension is achieved by 1) varying the depth of penetration of the knitting needle into fabric being knitted by a computer program, 2) adjusting the tension of yarn between a pinch roll and knitting head by a mechanism controlled by a computer and/or 3) casting off or picking up additional stitches in a course. The glove includes four finger components, a thumb component, two palm components, and a wrist component. A padded cuff section can be added to the wrist component for comfort.Type: ApplicationFiled: September 12, 2008Publication date: February 19, 2009Applicant: Ansell Healthcare Products LLCInventors: Eric Thompson, Jeffrey C. Moreland, Gerardo Rodriguez Garay, Norberto Hector Perales Solis, Dave Narasimhan
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Publication number: 20080269661Abstract: A bandage remains securely attached to the skin of a wearer during extended exposure to arid, humid or wet conditions. The bandage is readily removed from the attached condition upon application of pressure to its exterior surface. Adhesive portions of the contain pockets or microcapsules filled with an adhesive-inactivating ingredient. The pockets are formed in the backing layer. Microcapsules, if present, are incorporated in the adhesive. The adhesive inactivating ingredient comprises oil from vegetable source, mineral source or fatty acids. The wearer ruptures the pockets or microcapsules by applying pressure to the bandage above the adhesive portions. The adhesive-inactivating ingredient is thereby released at the skin-adhesive interface, permitting an easy, pain-free removal of the bandage.Type: ApplicationFiled: July 2, 2008Publication date: October 30, 2008Inventors: Marni Markell Hurwitz, Dave Narasimhan, Ernest D. Buff
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Patent number: 7434422Abstract: A knitted glove made by creating each of the at least fifteen sections using a separate knitting course on a flat knitting machine providing variable stitch dimensions with one or two yarns. Each of these sections provides custom stretch characteristics using one or two yarns providing a tight glove that provides flexibility and ease of movement. The variable stitch dimension is achieved by 1) varying the depth of penetration of the knitting needle into fabric being knitted by a computer program, 2) adjusting the tension of yarn between a pinch roll and knitting head by a mechanism controlled by a computer and 3) casting off or picking up additional stitches in a course. The glove includes five finger components made from at least ten separately knitted sections, two palm components each made from at least two separately knitted sections, and a wrist component made from at least one knitted section.Type: GrantFiled: June 1, 2006Date of Patent: October 14, 2008Assignee: Ansell Healthcare Products LLCInventors: Eric Thompson, Jeffrey C. Moreland, Dave Narasimhan, Gerardo Rodriguez Garay, Norberto Hector Perales Solis
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Publication number: 20080244809Abstract: Latex articles with geometrically defined surface structure providing enhanced grip characteristics in dry, wet or oily environments; and a method of making same comprising applying a polymeric coagulant coating to a smooth former surface, wherein the coating becomes tacky during drying, applying discrete coagulant particles of selected size, shape and distribution to the tacky coating to attach and protrude from the former surface with the polymeric coagulant coating, dipping the former into an aqueous latex emulsion, wherein the polymeric coagulant coating and the discrete coagulating particles destabilize the latex, thereby developing a latex layer, vulcanizing and stripping the latex article inside out, and dissolving the discrete coagulant particles in water or suitable solvents to reveal the geometrically designed texture with pre-selected size, shape and distribution of impressions providing improved dry, wet and oily surface grip by removal of a fluid boundary layer.Type: ApplicationFiled: April 21, 2008Publication date: October 9, 2008Inventors: Noorman Bin Abu Hassan, David M. Lucas, Fazli Shani, Dave Narasimhan
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Patent number: 7396976Abstract: A bandage remains securely attached to the skin of a wearer during extended exposure to arid, humid or wet conditions. The bandage is readily removed from the attached condition upon application of pressure to its exterior surface. Adhesive portions of the contain pockets or microcapsules filled with an adhesive-inactivating ingredient. The pockets are formed in the backing layer. Microcapsules, if present, are incorporated in the adhesive. The adhesive inactivating ingredient comprises oil from vegetable source, mineral source or fatty acids. The wearer ruptures the pockets or microcapsules by applying pressure to the bandage above the adhesive portions. The adhesive-inactivating ingredient is thereby released at the skin-adhesive interface, permitting an easy, pain-free removal of the bandage.Type: GrantFiled: April 21, 2006Date of Patent: July 8, 2008Assignee: I DID IT, Inc.Inventors: Marni Markell Hurwitz, Dave Narasimhan, Ernest D. Buff
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Patent number: 7378043Abstract: Latex articles with geometrically defined surface structure providing enhanced grip characteristics in dry, wet or oily environment; and a method of making same comprising applying a polymeric coagulant coating to a smooth former surface, wherein the coating becomes tacky during drying, applying discrete coagulant particles of selected size, shape and distribution to the tacky coating to attach and protrude from the former surface with the polymeric coagulant coating, dipping the former into an aqueous latex emulsion, wherein the polymeric coagulant coating and the discrete coagulating particles destabilize the latex, thereby developing a latex layer, vulcanizing and stripping the latex article inside out, and dissolving the discrete coagulant particles in water or suitable solvents to reveal the geometrically designed texture with pre-selected size, shape and distribution of impressions providing improved dry, wet and oily surface grip by removal of a fluid boundary layer.Type: GrantFiled: January 12, 2005Date of Patent: May 27, 2008Assignee: Ansell Healthcare Products LLCInventors: Noorman Abu Hassan, David M. Lucas, Fazli Shani, Dave Narasimhan
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Publication number: 20080092261Abstract: A glove with an integrally formed arm trough has a hand portion, arm portion and a cuff portion. The arm portion is provided with a first ridge, a second ridge with a larger diameter compared to the arm portion, and a third ridge. During use, the third ridge is pushed towards the first ridge by the user to extend the second ridge away from the arm and towards the hand portion forming a liquid capturing trough while the cuff portion protects from the arm from liquid exposure. The length between the third ridge and the second ridge is larger than the length between the first and second ridge so that the trough created has a positive cone angle and a depth to sufficient to provide liquid volume capacity. The ridges are shaped as sharp edges or C-sections to provide easy forming of the liquid capturing arm trough.Type: ApplicationFiled: September 21, 2006Publication date: April 24, 2008Applicant: Ansell Healthcare Products LLCInventors: Loo Liong Yu, David Mark Lucas, Ong Chin Kok, Karunagaran A/L Arumugam, Dave Narasimhan
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Patent number: 7307530Abstract: A radio-frequency surgical implement detection system detects surgical implements in a surgical wound during and at the completion of a surgical procedure. Surgical implements, including surgical sponges or laparotomy pads, gauze pads and metallic surgical instruments, are individually attached to a non battery-powered, encapsulated radio-frequency marker. The marker comprises an integrated chip having a burnt-in memory code, which is broadcast through an antenna using a modulated carrier frequency. The code is received by an interrogating antenna of a detector. The interrogating antenna provides a power pulse, which is received by the antenna of the radio-frequency marker. The power pulse charges a capacitor, which proves power for the read function, carrier frequency modulation function and broadcast function of the integrated chip, permitting each marker-containing implement to be specifically identified.Type: GrantFiled: February 10, 2005Date of Patent: December 11, 2007Inventors: Carl E. Fabian, Dave Narasimhan
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Publication number: 20070249981Abstract: A bandage remains securely attached to the skin of a wearer during extended exposure to arid, humid or wet conditions. The bandage is readily removed from the attached condition upon application of pressure to its exterior surface. Adhesive portions of the contain pockets or microcapsules filled with an adhesive-inactivating ingredient. The pockets are formed in the backing layer. Microcapsules, if present, are incorporated in the adhesive. The adhesive inactivating ingredient comprises oil from vegetable source, mineral source or fatty acids. The wearer ruptures the pockets or microcapsules by applying pressure to the bandage above the adhesive portions. The adhesive-inactivating ingredient is thereby released at the skin-adhesive interface, permitting an easy, pain-free removal of the bandage.Type: ApplicationFiled: April 21, 2006Publication date: October 25, 2007Inventors: Marni Hurwitz, Dave Narasimhan, Ernest Buff
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Publication number: 20070204381Abstract: A lightweight thin flexible latex glove article having a polymeric latex coating that penetrates the front portion of a knitted liner half way or more through the liner thickness and for at least a portion of the knitted liner, not penetrating the entire thickness. For example, the liner can be knitted using an 18-gauge needle with 70 to 221 denier nylon 66 multi-filament yarn. The polymer latex coating can be 0.75 to 1.25 times the thickness of the knitted liner. Over 30% reduction of glove thickness is achieved resulting in three times greater flexibility. The polymer latex coating may be foamed with 5 to 50 vol % air content. Open celled foamed latex coating may be coated with a dispersion of fluorochemical dispersion to prevent liquid permeation into the glove. The process can include steps to gel the latex emulsion at interstices of the yarn to prevent further penetration of the emulsion into the liner.Type: ApplicationFiled: February 21, 2007Publication date: September 6, 2007Applicant: Ansell Healthcare Products LLCInventors: Eric Thompson, Dave Narasimhan, Hafsah Mohd Ghazaly, Jeffrey C. Moreland
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Publication number: 20070181071Abstract: A breakable odor control additive provides release of fragrance or odor masking scent when present in a litter formulation that is used by a cat or other animal within a litter box. The odor control additive comprises a plurality of fragrant-scented balls. Each of the balls has a central, compressible, porous, open-celled substrate, which is saturated with a fragrant scent. This central, fragrance-saturated substrate is coated with a barrier coating comprising soda ash, which prevents evaporation of the fragrance and protects the substrate against deterioration by urine and other contaminants deposited on the litter when cat or animal enters the litter box, a load is applied to the fragrant-scented balls. The barrier coating breaks, exposing the fragrant coated substrate, while the soda ash neutralizes urine acid and retards odor development fragrance evaporating from the substrate provides odor control and a pleasant scent.Type: ApplicationFiled: April 21, 2006Publication date: August 9, 2007Inventors: Marni Hurwitz, Dave Narasimhan, Ernest Buff
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Patent number: 7246509Abstract: A knitted glove made by creating each of the sections of the glove using a separate knitting course on a flat knitting machine providing variable stitch dimensions. Each of these sections provides its own designed stretch characteristics so that the glove fits tightly, yet provides flexibility and ease of movement. The variable stitch dimension is achieved by 1) varying the depth of penetration of a knitting needle into a fabric being knitted by a computer program, 2) adjusting the tension of yarn between a pinch roller and a knitting head by a mechanism controlled by a computer, and 3) casting off or picking up additional stitches in a course. The glove includes a plurality of finger components made from at least ten separately knitted sections, two palm components, each of which is made from at least two separately knitted sections, and a wrist component made from at least one knitted section.Type: GrantFiled: December 19, 2006Date of Patent: July 24, 2007Assignee: Ansell Healthcare Products LLCInventors: Fred Hardee, Greg Plemmons, Eric Thompson, San Allen, Dave Narasimhan