Patents Assigned to Pathak Holdings, LLC
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Patent number: 11969398Abstract: This invention discloses methods and composition to form biodegradable polymer implant arrays in the live tissue. Artificial cavities are created in the live tissue by using laser ablation, oscillating needle, microneedle array and other methods. The cavities are then filled with biodegradable polymer solution. The solvent in the polymer solution is dissipated in the tissue to form a biodegradable polymer implant in artificial cavities. The cavities and implants formed are arranged to form of an array of implants. The biodegradable polymer in the cavity can also be loaded with drug to form biodegradable drug delivery array in the live tissue.Type: GrantFiled: May 19, 2021Date of Patent: April 30, 2024Assignee: PATHAK HOLDINGS LLCInventor: Chandrashekhar P. Pathak
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Patent number: 11911352Abstract: A method of forming an implant in tissue can include: providing a polymer solution having an effective amount of polymer dissolved in a biocompatible, water-soluble organic solvent; injecting a plurality of droplets of the polymer solution in the tissue; fusing the injected droplets together; dissipating the biocompatible, water-soluble organic solvent in the tissue; and precipitating the polymer from the injected polymer solution so as to form the implant.Type: GrantFiled: January 5, 2021Date of Patent: February 27, 2024Assignee: PATHAK HOLDINGS LLCInventor: Chandrashekhar P. Pathak
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Patent number: 11045433Abstract: This invention discloses methods and composition to form biodegradable polymer implant arrays in the live tissue. Artificial cavities are created in the live tissue by using laser ablation, oscillating needle, microneedle array and other methods. The cavities are then filled with biodegradable polymer solution. The solvent in the polymer solution is dissipated in the tissue to form a biodegradable polymer implant in artificial cavities. The cavities and implants formed are arranged to form of an array of implants. The biodegradable polymer in the cavity can also be loaded with drug to form biodegradable drug delivery array in the live tissue.Type: GrantFiled: March 13, 2020Date of Patent: June 29, 2021Assignee: Pathak Holdings LLCInventor: Chandrashekhar P. Pathak
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Patent number: 10918611Abstract: A method of forming an implant in a tissue can include: providing an injectable liquid composition comprising one or more precursors of a crosslinkable composition; injecting the injectable composition into the tissue at the rate of about 10-12000 injections per minute and/or at an amount of 1.0E-02 ml to 1.0E-16 ml per injection; and crosslinking the one or more precursors of the crosslinkable composition so as to form a crosslinked composition.Type: GrantFiled: December 18, 2019Date of Patent: February 16, 2021Assignee: PATHAK HOLDINGS LLCInventor: Chandrashekhar P. Pathak
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Patent number: 10624865Abstract: Methods and compositions are for preparing microimplant arrays for sustained drug delivery or live cell based therapy. The “array in array” (AIA) device enables formation of microimplant arrays without having tissue piercing elements to the microimplant. The methods and compositions are for solid state delivery of drugs, especially biologics drugs without forming a drug solution prior to injection. New methods and compositions are for preparing in situ arrays for sustained drug delivery or live cell based therapy. Tissue surface is first treated with laser drilling, microneedle array, mechanical drilling or other methods to create artificial micro-porosity of various sizes, shapes and patterns. The artificial pores created are then infused with sustained drug delivery compositions or live cell suspensions. The compositions are converted into solid or semisolid state by physical or chemical reaction/s to entrap drug or live cells. The entrapped drug or live cells provide local or systemic therapeutic benefit.Type: GrantFiled: October 10, 2018Date of Patent: April 21, 2020Assignee: Pathak Holdings LLCInventor: Chandrashekhar P. Pathak
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Patent number: 10543182Abstract: A method of forming a gel implant in tissue can include: providing an injectable composition configured for thermoreversible gel formation at about 37° C.; injecting the injectable composition into the tissue at the rate of about 10-12000 injections per minute; and forming a thermoreversible gel at about 37° C. from the injected injectable composition so as to form the gel implant. The injecting can be at an amount of 1.0E-02 ml to 1.0E-16 ml per needle per injection. The injecting can form an implant with area greater than or equal to 5 mm2. The injecting can be at a depth of 10 microns to 5 mm. The injectable composition can include a visualization agent, drug or other agent.Type: GrantFiled: September 20, 2018Date of Patent: January 28, 2020Assignee: Pathak Holdings LLCInventor: Chandrashekhar P. Pathak
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Patent number: 10123980Abstract: A method of forming an implant in the tissue can include: providing an injectable composition having a neat liquid carrier, wherein the neat liquid carrier is substantially liquid at room temperature and/or about body temperature; and injecting the neat liquid solution into the tissue at the rate of 10-12000 injections per minute and/or at an amount of 1.0E-02 ml to 1.0E-16 ml per needle per injection. The neat liquid carrier can be polymeric or non-polymeric. The neat liquid carrier can be biodegradable. The neat liquid carrier can include a viscosity-modifying agent. The injecting can form an implant with area greater than or equal to 5 mm2. The neat liquid carrier can be injected at a depth of 10 microns to 5 mm. The neat liquid solution can include a drug or other agent.Type: GrantFiled: September 14, 2017Date of Patent: November 13, 2018Assignee: Pathak Holdings, LLCInventor: Chandrashekhar P. Pathak
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Patent number: 9789073Abstract: This invention provide novel compositions, methods and devices for sustained drug delivery. The compositions can include a fluid carrier; a plurality of first polymeric microparticles having a bioactive agent dispersed in the fluid carrier; and a plurality of second polymeric microparticles having a visualization agent dispersed in the fluid carrier with the first microparticles. Alternative compositions can include: a fluid carrier; and a plurality of polymeric microparticles having a bioactive agent encapsulated therein and a visualization agent on a surface of the polymeric microparticles, the plurality of polymeric microparticles being dispersed in the fluid carrier. The microencapsulated sustained drug delivery compositions are deposited using oscillating needle apparatus oscillating at 10-12000 minutes per minutes at an amount of 1.0E-03 mL to 1.0E-16 mL per injection.Type: GrantFiled: April 14, 2016Date of Patent: October 17, 2017Assignee: Pathak Holdings, LLCInventor: Chandrashekhar P. Pathak
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Patent number: 9345777Abstract: This invention provide novel compositions, methods and devices for sustained drug delivery. The microencapsulated sustained drug delivery compositions are deposited using oscillating needle apparatus oscillating at 10-12000 minutes per minutes. The injected compositions may undergo variety of physical chemical changes upon deposition. The physical and chemical changes enables improved drug encapsulation and sustained drug release. Also described are new methods to form polymer microparticles or polymer films/implants in situ inside the tissue. The invention also describes colored biodegradable microparticle based compositions wherein the compositions comprise drug encapsulated microparticles and coloring agent encapsulated microparticles mixed in any proportion. Medical applications of the compositions and methods described in this invention are also described.Type: GrantFiled: June 10, 2015Date of Patent: May 24, 2016Assignee: Pathak Holdings, LLCInventor: Chandrashekhar P. Pathak
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Patent number: 9186422Abstract: Radio-opaque biodegradable compositions are formed by modifying terminal groups of synthetic and natural biodegradable polymers such as polylactones with iodinated moieties. The biodegradable property of the compositions renders them suitable for use in medical field such as drug delivery, imaging. Compounds disclosed in this invention exist as neat liquid. Certain compositions disclosed in this invention form hydrophobic iodine rich domains when dissolved in water, such domains provide better contrasting properties as well as ability to dissolve hydrophobic bioactive drugs. Certain iodinated moieties disclosed in the invention are capable of cross linking natural proteins in situ in presence of suitable catalysts and co-catalysts.Type: GrantFiled: August 16, 2012Date of Patent: November 17, 2015Assignee: Pathak Holdings LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Patent number: 9072814Abstract: Novel implantable tissue fixation methods and compositions are disclosed. Methods and compositions of tissue, fixed using polymeric and/or variable length crosslinks, and di- or polymercapto compounds are described. Also described are the methods and compositions wherein the tissue is fixed using biodegradable crosslinkers. Methods and compositions for making radio-opaque tissue are also described. Methods and compositions to obtain a degradable implantable tissue-synthetic biodegradable polymer composite are also described. Compositions and methods of incorporating substantially water-insoluble bioactive compounds in the implantable tissue are also disclosed. The use of membrane-like implantable tissue to make an implantable drug delivery patch are also disclosed. Also described are the compositions and methods to obtain a coated implantable tissue. Medical applications implantable tissue such as heart valve bioprosthesis, vascular grafts, meniscus implant, drug delivery patch are also disclosed.Type: GrantFiled: February 8, 2013Date of Patent: July 7, 2015Assignee: Pathak Holdings LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Patent number: 9072678Abstract: This invention provide novel compositions, methods and devices for sustained drug delivery. The microencapsulated sustained drug delivery compositions are deposited using oscillating needle apparatus oscillating at 10-12000 minutes per minutes. The injected compositions may undergo variety of physical chemical changes upon deposition. The physical and chemical changes enables improved drug encapsulation and sustained drug release. Also described are new methods to form polymer microparticles or polymer films/implants in situ inside the tissue. The invention also describes colored biodegradable microparticle based compositions wherein the compositions comprise drug encapsulated microparticles and coloring agent encapsulated microparticles mixed in any proportion. Medical applications of the compositions and methods described in this invention are also described.Type: GrantFiled: March 13, 2014Date of Patent: July 7, 2015Assignee: Pathak Holdings LLCInventor: Chandrashekhar P. Pathak
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Patent number: 9023379Abstract: Novel implantable tissue fixation methods and compositions are disclosed. Methods and compositions of tissue, fixed using polymeric and/or variable length crosslinks, and di- or polymercapto compounds are described. Also described are the methods and compositions wherein the tissue is fixed using biodegradable crosslinkers. Methods and compositions for making radio-opaque tissue are also described. Methods and compositions to obtain a degradable implantable tissue-synthetic biodegradable polymer composite are also described. Compositions and methods of incorporating substantially water-insoluble bioactive compounds in the implantable tissue are also disclosed. The use of membrane-like implantable tissue to make an implantable drug delivery patch are also disclosed. Also described are the compositions and methods to obtain a coated implantable tissue. Medical applications implantable tissue such as heart valve bioprosthesis, vascular grafts, meniscus implant, drug delivery patch are also disclosed.Type: GrantFiled: February 8, 2013Date of Patent: May 5, 2015Assignee: Pathak Holdings LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Publication number: 20140271897Abstract: This invention provide novel compositions, methods and devices for sustained drug delivery. The microencapsulated sustained drug delivery compositions are deposited using oscillating needle apparatus oscillating at 10-12000 minutes per minutes. The injected compositions may undergo variety of physical chemical changes upon deposition. The physical and chemical changes enables improved drug encapsulation and sustained drug release. Also described are new methods to form polymer microparticles or polymer films/implants in situ inside the tissue. The invention also describes colored biodegradable microparticle based compositions wherein the compositions comprise drug encapsulated microparticles and coloring agent encapsulated microparticles mixed in any proportion. Medical applications of the compositions and methods described in this invention are also described.Type: ApplicationFiled: March 13, 2014Publication date: September 18, 2014Applicant: Pathak Holding, LLCInventor: Chandrashekhar P. Pathak
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Publication number: 20140224134Abstract: Systems and methods for filling a fleshy fruit or vegetable with a filler are described. Embodiments include tool having an expandable member that is expandable to an expanded position to make a cavity in the fruit and collapsible to a collapsed position for withdrawal from the fruit, with the expandable member in the expanded state comprising a cross-section that is larger than the maximum diameter of the tool in the collapsed position. A cavity may be created without substantially affecting the natural visual appearance of the fruit or vegetable. Fillers and filling methods are disclosed.Type: ApplicationFiled: April 22, 2014Publication date: August 14, 2014Applicant: PATHAK HOLDINGS, LLCInventors: Chandrashekhar P. Pathak, Nivedita C. Pathak
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Publication number: 20140050689Abstract: Novel implantable tissue fixation methods and compositions are disclosed. Methods and compositions of tissue, fixed using polymeric and/or variable length crosslinks, and di- or polymercapto compounds are described. Also described are the methods and compositions wherein the tissue is fixed using biodegradable crosslinkers. Methods and compositions for making radio-opaque tissue are also described. Methods and compositions to obtain a degradable implantable tissue-synthetic biodegradable polymer composite are also described. Compositions and methods of incorporating substantially water-insoluble bioactive compounds in the implantable tissue are also disclosed. The use of membrane-like implantable tissue to make an implantable drug delivery patch are also disclosed. Also described are the compositions and methods to obtain a coated implantable tissue. Medical applications implantable tissue such as heart valve bioprosthesis, vascular grafts, meniscus implant, drug delivery patch are also disclosed.Type: ApplicationFiled: February 8, 2013Publication date: February 20, 2014Applicant: Pathak Holdings LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Publication number: 20130149387Abstract: Novel implantable tissue fixation methods and compositions are disclosed. Methods and compositions of tissue, fixed using polymeric and/or variable length crosslinks, and di- or polymercapto compounds are described. Also described are the methods and compositions wherein the tissue is fixed using biodegradable crosslinkers. Methods and compositions for making radio-opaque tissue are also described. Methods and compositions to obtain a degradable implantable tissue-synthetic biodegradable polymer composite are also described. Compositions and methods of incorporating substantially water-insoluble bioactive compounds in the implantable tissue are also disclosed. The use of membrane-like implantable tissue to make an implantable drug delivery patch are also disclosed. Also described are the compositions and methods to obtain a coated implantable tissue. Medical applications implantable tissue such as heart valve bioprosthesis, vascular grafts, meniscus implant, drug delivery patch are also disclosed.Type: ApplicationFiled: February 8, 2013Publication date: June 13, 2013Applicant: PATHAK HOLDINGS LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Publication number: 20120308481Abstract: Radio-opaque biodegradable compositions are formed by modifying terminal groups of synthetic and natural biodegradable polymers such as polylactones with iodinated moieties. The biodegradable property of the compositions renders them suitable for use in medical field such as drug delivery, imaging. Compounds disclosed in this invention exist as neat liquid. Certain compositions disclosed in this invention form hydrophobic iodine rich domains when dissolved in water, such domains provide better contrasting properties as well as ability to dissolve hydrophobic bioactive drugs. Certain iodinated moieties disclosed in the invention are capable of cross linking natural proteins in situ in presence of suitable catalysts and co-catalysts.Type: ApplicationFiled: August 16, 2012Publication date: December 6, 2012Applicant: PATHAK HOLDINGS LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Patent number: 8273327Abstract: Radio-opaque biodegradable compositions are formed by modifying terminal groups of synthetic and natural biodegradable polymers such as polylactones with iodinated moieties. The biodegradable property of the compositions renders them suitable for use in medical field such as drug delivery, imaging. Compounds disclosed in this invention exist as neat liquid. Certain compositions disclosed in this invention form hydrophobic iodine rich domains when dissolved in water, such domains provide better contrasting properties as well as ability to dissolve hydrophobic bioactive drugs. Certain iodinated moieties disclosed in the invention are capable of cross linking natural proteins in situ in presence of suitable catalysts and co-catalysts.Type: GrantFiled: July 21, 2010Date of Patent: September 25, 2012Assignee: Pathak Holdings, LLCInventors: Chandrashekhar P. Pathak, Sanjay M. Thigle
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Patent number: 7919112Abstract: Novel implantable tissue fixation methods and compositions are disclosed. Methods and compositions of tissue, fixed using polymeric and/or variable length crosslinks, and di- or polymercapto compounds are described. Also described are the methods and compositions wherein the tissue is fixed using biodegradable crosslinkers. Methods and compositions for making radio-opaque tissue are also described. Methods and compositions to obtain a degradable implantable tissue-synthetic biodegradable polymer composite are also described. Compositions and methods of incorporating substantially water-insoluble bioactive compounds in the implantable tissue are also disclosed. The use of membrane-like implantable tissue to make an implantable drug delivery patch are also disclosed. Also described are the compositions and methods to obtain a coated implantable tissue. Medical applications implantable tissue such as heart valve bioprosthesis, vascular grafts, meniscus implant, drug delivery patch are also disclosed.Type: GrantFiled: August 24, 2005Date of Patent: April 5, 2011Assignee: Pathak Holdings, LLCInventors: Chandraskekhar P. Pathak, Sanjay M. Thigle