Patents by Inventor Pallatheri M. Subramanian

Pallatheri M. Subramanian 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).

  • Publication number: 20080066249
    Abstract: The invention is a cleaning device comprising of a shaft. The shaft has a hollow section and a lower end with a rim. The rim defines an opening at the bottom end of the shaft. The opening is located about the longitudinal axis and is in communication with the hollow section. The shaft also has one or more apertures that extend through the side of the shaft and are in communication with said hollow section. The shaft also has one or more slits that maybe in communication with the one or more apertures. The slit(s) run parallel to the longitudinal axis and may terminate before reaching the rim. The cleaning device is designed in such a way to easily allow a user to employ any flexible fabric or other suitable material in the cleaning device.
    Type: Application
    Filed: September 18, 2006
    Publication date: March 20, 2008
    Inventor: Pallatheri M. Subramanian
  • Publication number: 20080066250
    Abstract: The invention is a cleaning device comprising of a shaft with two or more apertures. The shaft also has two or more slits. The user will place one or more pieces of fabric through the two apertures and then pulled through the slits. This severs to provide a user with a taut piece of fabric along the shaft to be used for cleaning. The user is then able to apply pressure to the cleaning fabric via the shaft to the area being cleaned.
    Type: Application
    Filed: September 18, 2006
    Publication date: March 20, 2008
    Inventor: Pallatheri M. Subramanian
  • Patent number: 6749785
    Abstract: Multilayer shaped articles, including films, preforms and containers, and method for forming the same, having at least one layer of poly(1,3-propylene 2,6-naphthalate) and at least one layer of poly(ethylene terephthalate). Poly(1,3-propylene 2,6-naphthalate) can be co-stretched with poly(ethylene terephthalate) to form oriented multilayer structures which have superior barrier properties. The poly(1,3-propylene 2,6-naphthalate) and poly(ethylene terephthalate) layers have good adhesion and do not require an adhesive tie layer.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: June 15, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Pallatheri M. Subramanian, Howard Chung-Ho Ng, Ross A. Lee
  • Publication number: 20040043169
    Abstract: Multilayer shaped articles, including films, preforms and containers, and method for forming the same, having at least one layer of poly(l, 3-propylene 2,6-naphthalate) and at least one layer of poly(ethylene terephthalate). Poly(1, 3-propylene 2,6-naphthalate) can be co-stretched with poly(ethylene terephthalate) to form oriented multilayer structures which have superior barrier properties. The poly(l,3-propylene 2,6-naphthalate) and poly(ethylene terephthalate) layers have good adhesion and do not require an adhesive tie layer.
    Type: Application
    Filed: August 29, 2003
    Publication date: March 4, 2004
    Applicant: E.I. du Pont de Nemours & Company
    Inventors: Pallatheri M. Subramanian, Howard Chung-Ho Ng, Ross A. Lee
  • Publication number: 20030124280
    Abstract: Multilayer shaped articles, including films, preforms and containers, and method for forming the same, having at least one layer of poly(1,3-propylene 2,6-naphthalate) and at least one layer of poly(ethylene terephthalate). Poly(1,3-propylene 2,6-naphthalate) can be co-stretched with poly(ethylene terephthalate) to form oriented multilayer structures which have superior barrier properties. The poly(1,3-propylene 2,6-naphthalate) and poly(ethylene terephthalate) layers have good adhesion and do not require an adhesive tie layer.
    Type: Application
    Filed: November 21, 2002
    Publication date: July 3, 2003
    Inventors: Pallatheri M. Subramanian, Howard Chung-Ho Ng, Ross A. Lee
  • Publication number: 20020048682
    Abstract: Multilayer shaped articles, including films, preforms and containers, and method for forming the same, having at least one layer of poly(1,3-propylene 2,6-naphthalate) and at least one layer of poly(ethylene terephthalate). Poly(1,3-propylene 2,6-naphthalate) can be co-stretched with poly(ethylene terephthalate) to form oriented multilayer structures which have superior barrier properties. The poly(1,3-propylene 2,6-naphthalate) and poly(ethylene terephthalate) layers have good adhesion and do not require an adhesive tie layer.
    Type: Application
    Filed: August 7, 2001
    Publication date: April 25, 2002
    Inventors: Pallatheri M. Subramanian, Howard Chung-Ho Ng, Ross A. Lee
  • Patent number: 5538784
    Abstract: Inorganic fiber-reinforced thermoplastic articles are produced from precisely proportioned feed mixtures of particles of thermoplastic polymer, a polymer modifier and inorganic fiber bundles supplied, under specified conditions, directly to an injection molding apparatus. The articles exhibit exceptionally superior heat deflection temperature compared to articles produced from feeds which are precompounded prior to injection molding.
    Type: Grant
    Filed: September 21, 1994
    Date of Patent: July 23, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 5430068
    Abstract: Polyamide is recovered by an improved solution process and with minimal polyamide degradation.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: July 4, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 5408000
    Abstract: A flexible, thermoplastic, blow moldable composition which comprises a substantially homogeneous blend of A) about 40-60 wt. % polyamide, B) about 20-58 wt. % of a first ethylene copolymer selected from the group consisting of copolymers of ethylene and at least one alpha, beta ethylenically-unsaturated carboxylic acid having 3-8 carbon atoms, and ionomers of said ethylene copolymers, C) about 1-20 wt. % of a second ethylene copolymer having interpolymerized units of ethylene and 1-10 wt. % of an alpha, beta ethylenically-unsaturated aliphatic epoxide, and D) 0.1-0.6 wt. % fibrillatable polytetrafluoroethylene or fibrillatable modified polytetrafluoroethylene.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: April 18, 1995
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: James D. Katsaros, Pallatheri M. Subramanian, Donald R. Swain
  • Patent number: 5130076
    Abstract: Melt fabrication, with precompounding, of a plurality of thermoplastic resins, is provided by use of a screw having a dispersion section in such machines as injection molding machines. The minor resin component can be an elastomer, which toughens the resin's major component. This effect is improved by increasing back pressure on the screw used in the injection molding machine, to extend the screw rotation and thus shear time accomplished by the dispersion section.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: July 14, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Philip S. Blatz, Paul N. Richardson, Pallatheri M. Subramanian
  • Patent number: 5128202
    Abstract: Foam molding is carried out with a melt blend of polyethylene terephthalate (PET), ethylene copolymer elastomer, and glass fibers in the presence of blowing agent and with a cold mold, so that the resultant foamed article has an amorphous-rich PET surface and a crystalline PET core.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Pallatheri M. Subramanian, Christopher L. Tice
  • Patent number: 5126407
    Abstract: It has now been found that a unique combination of additives makes semi-crystalline polyamides readily processible by extrusion blowmolding to make hollow, stiff parts of various shapes. The compositions consist essentially of a semicrystalline polyamide, a selected ionomeric toughening agent, and an anhydride-rich ethylene copolymer.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 5122570
    Abstract: It has now been found that a unique combination of additives makes semi-crystalline polyamides readily processible by extrusion blowmolding to make hollow, stiff parts of various shapes. The compositions consist essentially of semicrystalline polyamide, a selected toughening agent and an anhydride-rich ethylene copolymer.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: June 16, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 5096964
    Abstract: A melt blend of a polyacetal, an ethylene-vinyl alcohol copolymer, and a fibrillatable fluoropolymer resin. The blends are blow moldable.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: March 17, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 5053258
    Abstract: A laminar article of a base polyolefin, a condensation polymer incompatible with the base polyolefin and an alkylcarboxyl-substituted polyolefin is stretched 2 to 6 times its dimensions above a temperature at which a significant portion of the crystals of the base polyolefin have melted and below a temperature at which all of the crystals have melted.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: October 1, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jack D. Booze, Pallatheri M. Subramanian
  • Patent number: 4966941
    Abstract: It has now been found that a unique combination of additives makes semi-crystalline polyamides readily processible by extrusion blowmolding to make hollow, stiff parts of various shapes. The compositions consist essentially of semicrystalline polyamide, a selected toughening agent and an anhydride-rich ethylene copolymer, and a fibrillar polytetrafluoroethylene.
    Type: Grant
    Filed: January 19, 1989
    Date of Patent: October 30, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 4902747
    Abstract: In the instant invention, improved blow moldable polyarylate compositions which yield molded objects having substantially uniform wall thickness throughout are provided by the addition of a small amount of a fibrillatable fluoropolymer resin.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: February 20, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert J. Kassal, Pallatheri M. Subramanian
  • Patent number: 4900788
    Abstract: A blow moldable composition of a polyether, an epoxide polymer, and a fibrillatable tetrafluoroethylene polymer.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: February 13, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Patent number: 4870110
    Abstract: Polyethylene terephthalate scrap material containing on its surface a chlorine-containing polymer such as, for example, polyvinylidene chloride or polyvinyl chloride, can be recovered and reused by melt-blending it with a polymer from a defined class of ethylene copolymers containing an epoxy group, and melt processing the blend in the same manner as virgin polyethylene terephthalate. The recovered and reprocessed polymer material has good physical properties and barrier properties.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: September 26, 1989
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Vinodkumar Mehra, Pallatheri M. Subramanian
  • Patent number: 4826897
    Abstract: Polyethylene terephthalate scrap material containing on its surface a chlorine-containing polymer such as, for example, polyvinylidene chloride or polyvinyl chloride, can be recovered and reused by melt-blending it with a polymer from a defined class of ethylene copolymers containing an epoxy group, and melt processing the blend in the same manner as virgin polyethylene terephthalate. The recovered and reprocessed polymer material has good physical properties and barrier properties.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: May 2, 1989
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Vinodkumar Mehra, Pallatheri M. Subramanian