Patents by Inventor In P. Park

In P. Park 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: 7226955
    Abstract: A cellular thermoplastic polyolefin foam comprising at least one particulate additive in admixture with a polymer matrix is disclosed, along with a process and foamable gel for manufacturing the same, wherein the polyolefin matrix comprises at least one polymer resin graft-modified with at least one polar group selected from the group consisting of acid, acid ester, and acid anhydride, and salts thereof. The invention facilitates the manufacture of macrocellular foams useful for acoustic absorption having increased amounts of particulate additives that provide certain desired properties difficult to achieve without the particulate additives, such as improved flame retardancy.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: June 5, 2007
    Assignee: Dow Global Technologies Inc.
    Inventors: Suresh Subramonian, Chung P. Park
  • Patent number: 7144925
    Abstract: A macrocellular foam is described having improved cell size and Fire-test-response Characteristics, among other features, which is obtained by selecting a particle size less than 1 micron for the flame retardant adjuvant. The inventors found that the amount of fire retardant adjuvant can be increased for a given foam cell size or the foam cell size can be increased for a given amount of fire retardant adjuvant, allowing the production of foams having exceptionally large, well-formed, cells that have excellent Fire-test-response Characteristics. The benefits are especially noteworthy in relation to thermoplastic foams and inorganic flame retardation adjuvants, due to the unexpected reduction in the nucleation effect of the adjuvant. The foams are useful for improving the acoustic performance of products that are required to meet certain Fire-test-response Characteristics.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: December 5, 2006
    Assignee: Dow Global Technologies Inc.
    Inventors: Sandrine Burgun, Jonathan Kammerer, Chung P. Park, William G. Stobby, Suresh Subramonian
  • Patent number: 7018700
    Abstract: Polymer foams having a good balance of high sound absorption, low thermal conductivity and generally low water absorption are disclosed which are obtainable by perforating (i.e., hole punching) a polymer foam having a moderately large cell size (1.5 mm to 4 mm) and an open content not greater than 40 percent to increase the open cell content of the foam by at least about 10 percent relative to the non-perforated foam, the polymer foam matrix preferably made of a thermoplastic foam, such as a low-density polyethylene (LDPE) resin, a high melt strength (HMS) polypropylene resin (PP), or a blend of an HMS PP resin and an LDPE resin, optionally containing a cell size enlarging agent such as glycerol monostearate, an antioxidant, carbon black and/or flame retardant additives, using a volatile organic compound, e.g. isobutane, as blowing agent.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: March 28, 2006
    Assignee: Dow Global Technologies Inc.
    Inventor: Chung P. Park
  • Patent number: 6949588
    Abstract: Thermoplastic polymer foams having sound deadening properties satisfactory for demanding applications are provided which have mechanical strength, which are economical to manufacture, and which are hydrolytically stable. Methods of preparing these foams are also provided. The foams are useful in sound management, cushion packaging, filtering, and fluid absorption and exhibit one or more of the following properties: 1) average cell size greater than about 2 mm; 2) substantially open-cell structure and 3) relatively large pores connecting the cells. In order that the foam be acoustically active, the foam should possess a substantially open-cell structure and a relatively low airflow resistivity. Foams with substantially open-cell structure and relatively low airflow resistivity are prepared by mechanically opening a foam having an average cell size greater than about 2 mm. In most cases, such mechanical opening creates relatively large pores connecting the cells.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: September 27, 2005
    Assignee: Dow Global Technologies Inc.
    Inventor: Chung P. Park
  • Patent number: 6875255
    Abstract: A removable dirt separation system for a vacuum cleaner is disclosed. The dirt separation system includes a dirt cup having a number of outer walls having a first portion defined by a filter assembly and a second portion with a first translucent panel to allow viewing material which accumulates within the dirt cup. The dirt cup further includes a top opening allow emptying of the dirt cup and an inlet in fluid communication with a suction nozzle of the vacuum cleaner. The dirt separation system further includes a lid for sealing the upper opening of the dirt cup. The dirt separation system yet further include a dirt duct for routing air which exits the filter assembly to an exit opening of the dirt separation system. A method of operating a removable dirt separation system for a vacuum cleaner is also disclosed.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 5, 2005
    Assignee: The Hoover Company
    Inventors: William G. Alford, Jerry L. Balzer, Greg A. Bilek, Joseph A. Garisto, Erik D. Lesco, David C. Kumpf, Edgar A. Maurer, David P. Parks, Jackson W. Wegelin
  • Patent number: 6869961
    Abstract: The present invention provides store operated calcium influx inhibitor compounds, pharmaceutical compositions, and methods of use. The compounds are useful for treating an inflammatory disease or treating an inflammatory reaction. Preferably, compounds, compositions and methods of this invention are used for treatment of inflammatory skin, pulmonary, musculoskeletal, and gastrointestinal diseases, as well as autoimmune disorders, transplantation treatment, and osteoporosis.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: March 22, 2005
    Assignee: Cellegy Pharmaceuticals, Inc.
    Inventors: Thomas P. Parks, Don R. Baker
  • Publication number: 20040176484
    Abstract: Thermoplastic polymer foams having sound deadening properties satisfactory for demanding applications are provided which have mechanical strength, which are economical to manufacture, and which are hydrolytically stable. Methods of preparing these foams are also provided. The foams are useful in sound management, cushion packaging, filtering, and fluid absorption and exhibit one or more of the following properties: 1) average cell size greater than about 2 mm; 2) substantially open-cell structure and 3) relatively large pores connecting the cells. In order that the foam be acoustically active, the foam should possess a substantially open-cell structure and a relatively low airflow resistivity. Foams with substantially open-cell structure and relatively low airflow resistivity are prepared by mechanically opening a foam having an average cell size greater than about 2 mm. In most cases, such mechanical opening creates relatively large pores connecting the cells.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 9, 2004
    Inventor: Chung P. Park
  • Publication number: 20040167240
    Abstract: A macmocellular foam is described having improved cell size and Fire-test-response Characteristics, among other features, which is obtained by selecting a particle size less than 1 micron for the flame retardant adjuvant. The inventors found that the amount of fire retardant adjuvant can be increased for a given foam cell size or the foam cell size can be increased for a given amount of fire retardant adjuvant, allowing the production of foams having exceptionally large, well-formed, cells that have excellent Fire-test-response Characteristics. The benefits are especially noteworthy in relation to thermoplastic foams and inorganic flame retardation adjuvants, due to the unexpected reduction in the nucleation effect of the adjuvant. The foams are useful for improving the acoustic performance of products that are required to meet certain Fire-test-response Characteristics.
    Type: Application
    Filed: October 30, 2003
    Publication date: August 26, 2004
    Inventors: Sandrine Burgun, Jonathan Kammerer, Chung P Park, William G Stobby, Suresh Subramonian
  • Publication number: 20040106537
    Abstract: The present invention provides store operated calcium influx inhibitor compounds, pharmaceutical compositions, and methods of use. The compounds are useful for treating an inflammatory disease or treating an inflammatory reaction. Preferably, compounds, compositions and methods of this invention are used for treatment of inflammatory skin, pulmonary, musculoskeletal, and gastrointestinal diseases, as well as autoimmune disorders, transplantation treatment, and osteoporosis.
    Type: Application
    Filed: September 24, 2003
    Publication date: June 3, 2004
    Applicant: Cellegy Pharmaceuticals, Inc.
    Inventors: Thomas P. Parks, Don R. Baker
  • Patent number: 6720363
    Abstract: A process for making a macrocellular acoustic foam is disclosed in which a foamable gel made of a blowing agent and a polymeric resin composition is subjected to an extrusion process at a die pressure greater than the prefoaming critical die pressure but less than or equal to four times that of said prefoaming critical die pressure and macrocellular foams obtainable by that process are also disclosed which are made of: A) one or more homopolymers of ethylene, one or more C3-C20 &agr;-olefin polymers, or a combination thereof; B) one or more halogenated flame retardants; C) optionally, one or more polymers other than that of Component A; and D) optionally, one or more flame retardant synergists.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: April 13, 2004
    Assignee: Dow Global Technologies Inc.
    Inventors: Suresh Subramonian, Sandrine Burgun, Chung P. Park
  • Patent number: 6720362
    Abstract: Thermoplastic polymer foams having sound deadening properties satisfactory for demanding applications are provided which have mechanical strength, which are economical to manufacture, and which are hydrolytically stable. Methods of preparing these foams are also provided. The foams are useful in sound management, cushion packaging, filtering, and fluid absorption and exhibit one or more of the following properties: 1) average cell size greater than about 2 mm; 2) substantially open-cell structure and 3) relatively large pores connecting the cells. In order that the foam be acoustically active, the foam should possess a substiantially open-cell structure and a relatively low airflow resistivity. Foams with substantially open-cell structure and relatively low airflow resistivity are prepared by mechanically opening a foam having an average cell size greater than about 2 mm. In most cases, such mechanical opening creates relatively large pores connecting the cells.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: April 13, 2004
    Assignee: The Dow Chemical Company
    Inventor: Chung P. Park
  • Patent number: 6712020
    Abstract: A toroidal plasma source (28) within a substrate processing chamber (10). The toroidal plasma source forms a poloidal plasma with theta symmetry. The poloidal plasma current is essentially parallel to a surface of the plasma generating structure, thus reducing sputtering erosion of the inner walls. The plasma current is similarly essentially parallel to a process surface (32) of a substrate (34) within the chamber. In a further embodiment, a shaped member (66) between the substrate and the plasma source controls the plasma density in a selected fashion to enhance plasma processing uniformity.
    Type: Grant
    Filed: June 12, 2002
    Date of Patent: March 30, 2004
    Assignee: Applied Materials Inc.
    Inventors: Michael S. Cox, Canfeng Lai, Robert B. Majewski, David P. Wanamaker, Christopher T. Lane, Peter Loewenhardt, Shamouil Shamouilian, John P. Parks
  • Patent number: 6699886
    Abstract: The present invention provides store operated calcium influx inhibitor compounds, pharmaceutical compositions, and methods of use. The compounds are useful for treating an inflammatory disease or treating an inflammatory reaction. Preferably, compounds, compositions and methods of this invention are used for treatment of inflammatory skin, pulmonary, musculoskeletal, and gastrointestinal diseases, as well as autoimmune disorders, transplantation treatment, and osteoporosis.
    Type: Grant
    Filed: May 31, 2002
    Date of Patent: March 2, 2004
    Assignee: Cellegy Pharmaceuticals, Inc.
    Inventors: Thomas P. Parks, Don R. Baker
  • Publication number: 20040039072
    Abstract: Polymer foams having a good balance of high sound absorption, low thermal conductivity and generally low water absorption are disclosed which are obtainable by perforating (i.e., hole punching) a polymer foam having a moderately large cell size (1.5 mm to 4 mm) and an open content not greater than 40 percent to increase the open cell content of the foam by at least about 10 percent relative to the non-perforated foam, the polymer foam matrix preferably made of a thermoplastic foam, such as a low-density polyethylene (LDPE) resin, a high melt strength (HMS) polypropylene resin (PP), or a blend of an HMS PP resin and an LDPE resin, optionally containing a cell size enlarging agent such as glycerol monostearate, an antioxidant, carbon black and/or flame retardant additives, using a volatile organic compound, e.g. isobutane, as blowing agent.
    Type: Application
    Filed: August 22, 2002
    Publication date: February 26, 2004
    Inventor: Chung P Park
  • Publication number: 20040001945
    Abstract: The invention is a composite foam structure comprising a first segment of an anisotropic thermoplastic foam part and a second foam shaped part comprising an isotropic foam wherein the anisotropic foam block and isotropic foam part intersect along at least one common surface.
    Type: Application
    Filed: June 27, 2002
    Publication date: January 1, 2004
    Inventors: Peter J. Cate, Myron J. Maurer, Chung P. Park, Dominicus L.A.M. Bindels, Martin H. Tusim
  • Publication number: 20030208878
    Abstract: A removable dirt separation system for a vacuum cleaner is disclosed. The dirt separation system includes a dirt cup having a number of outer walls having a first portion defined by a filter assembly and a second portion with a first translucent panel to allow viewing material which accumulates within the dirt cup. The dirt cup further includes a top opening allow emptying of the dirt cup and an inlet in fluid communication with a suction nozzle of the vacuum cleaner. The dirt separation system further includes a lid for sealing the upper opening of the dirt cup. The dirt separation system yet further include a dirt duct for routing air which exits the filter assembly to an exit opening of the dirt separation system. A method of operating a removable dirt separation system for a vacuum cleaner is also disclosed.
    Type: Application
    Filed: May 8, 2002
    Publication date: November 13, 2003
    Inventors: William G. Alford, Jerry L. Balzer, Greg A. Bilek, Joseph A. Garisto, Erik D. Lesco, David C. Kumpf, Edgar G. Maurer, David P. Parks, Jackson W. Wegelin
  • Patent number: 6627632
    Abstract: Compositions and methods for the treatment of anorectal disorders are provided in which certain combinations of NO donors, PDE inhibitors, superoxide (O2−) scavengers, &bgr;-adrenergic agonists, cAMP-dependent protein kinase activators, &agr;1-adrenergic antagonists, L-type Ca2+ channel blockers, estrogens, ATP-sensitive K+ channel activators and smooth muscle relaxants are used.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: September 30, 2003
    Assignee: Cellegy Pharmaceuticals, Inc.
    Inventors: Thomas P. Parks, Vivien Mak, Jung-Chung Lee, Charles Lee
  • Publication number: 20030162852
    Abstract: An acoustical insulation foam having, either with or without elastification, an Asker C hardness of less than about 65, a density of about 5 to about 150 kg/m3, a cell size of about 0.
    Type: Application
    Filed: January 6, 2003
    Publication date: August 28, 2003
    Inventors: Bharat I. Chaudhary, Russell P. Barry, Chung P. Park, Martin Reimers
  • Publication number: 20030145566
    Abstract: A novel construction of a disposable filtration bag made from a sheet of composite material comprised of at least one layer of expanded polythtraflouroethylene (ePTFE) and at least one substrate layer. In the preferred embodiment of the invention, a conventional disposable filtration bag is provided for use in floor care appliances such as upright and canister vacuum cleaners. In an alternate embodiment, a “pillow case” type disposable filtration bag is provided for use in floor care appliances such as upright and canister vacuum cleaners. Two methods of construction of the “pillow case” type disposable filtration bag are provided wherein in one method of construction the composite sheet is folded twice and sealed, and in the other, the composite sheet is folded once and sealed to form the disposable filtration bag.
    Type: Application
    Filed: February 4, 2002
    Publication date: August 7, 2003
    Inventors: David P. Parks, Jackson W. Wegelin
  • Patent number: 6590006
    Abstract: Macrocellular polyolefin foams that can withstand temperatures above 110° C. are described for use in sound absorption and insulation applications, especially in elevated temperature and/or moist environments. These foams have a large cell size (≧1.5 mm), are open or closed-cell foams, and preferably have at least one perforation per square centimeter and/or a density less than 25 kg/m3. They are obtainable by extruding a high melt strength (HMS) polypropylene resin (PP), or preferably a blend of a HMS PP resin and a free radical polymerized ethylene polymer present in the blend in a weight ratio of at least 35:65, optionally another polymer such as a substantially random interpolymer, a cell size enlarging agent such a glycerol monostearate, an antioxidant, carbon black and/or flame retardant additives, using a volatile organic compound, e.g. isobutane, as blowing agent.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: July 8, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Chung P. Park, Suresh Subramonian, Sandrine Burgun