Patents by Inventor Narendra M. Patel

Narendra M. Patel 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: 5552467
    Abstract: Rapid thermosetting, low VOC web offset lithographic inks are prepared in the instant invention from solid resin, drying oil alkyds, bodied drying oil, vegetable oil, fatty acids, multifunctional unsaturated polyester, reducing agents and transition metal salts of organic acids. The aqueous lithographic fountain solution contains hydroperoxides or peroxides which promote free radical polymerization of the ink in contact therewith. The metal salts of organic acids function as crosslinking agents in combination with excess carboxylic acid functionality of the ink. Optionally, the reducing agent and the organic hydroperoxide or peroxide may be interchanged.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: September 3, 1996
    Assignee: Sun Chemical Corporation
    Inventors: Ralph H. Reiter, Narendra M. Patel
  • Patent number: 5349021
    Abstract: A thermosetting printing ink composition comprising a functional copolymer of a thermosettable polyester and a polysiloxane, a pigment, a crosslinking agent and a curing catalyst which may be a strong acid or a metal salt thereof. The composition desirably also includes a reactive diluent such as a glycol, glycol ether or alcohol. The compositions are especially useful for imprinting metal containers such as beer and soda cans.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: September 20, 1994
    Assignee: Sun Chemical Corporation
    Inventors: John M. Rooney, Narendra M. Patel, Albert A. Kveglis, Robert J. Catena, Leonard Di Leo, Selcuk Avci
  • Patent number: 5312877
    Abstract: A coating composition having a total solids content of at least about 85 wt. %, based on the weight of the composition, a volatile organic chemical content of less than about 15 wt. %, based on the weight of the composition and a Brookfield viscosity of about 500-2,000 centipoises at 25.degree. C. The composition contains a polyester polyol having a weight average molecular weight of about 300-900 and a hydroxy number of about 150-400; at least one thermosettable polyester; an alkoxy aminoplast resin; a reactive diluent present in an amount of 0-30 wt. %, based on the weight of the composition; and an acid catalyst curing agent.
    Type: Grant
    Filed: February 12, 1993
    Date of Patent: May 17, 1994
    Assignee: Sun Chemical Corporation
    Inventors: Selcuk Avci, Narendra M. Patel, Leonard Di Leo, Ralph H. Reiter
  • Patent number: 5068273
    Abstract: A thermosetting composition comprising a mixture of a thermosettable polyester and an aminoplast resin together with an alkali metal sulfonate. The composition may also contain a pigment and a reactive diluent. The composition is useful as a coating or ink.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: November 26, 1991
    Assignee: Sun Chemical Corporation
    Inventors: Narendra M. Patel, Leonard Di Leo
  • Patent number: 4276609
    Abstract: A data store and retrieval system is disclosed in which a pair of RAM buffer memories are coupled to a CCD page main memory to provide high-speed read/write access by a computer to the main memory. Each buffer memory has stored therein a page of data transferred from the CCD main memory. Compare means included in the system compares the page address requested by the computer with the page address stored in the buffer memories. If a comparison is found, the designated buffer memory is accessed for the requested data. Both read/write access is available under these conditions. If a no comparison is found, logic circuits located in the system using the requested page address transfer the page in which the requested address is located from the CCD main memory to the RAM buffer memories for access by the computer.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: June 30, 1981
    Assignee: NCR Corporation
    Inventor: Narendra M. Patel
  • Patent number: 4249247
    Abstract: A method and apparatus for controlling the refreshing of a volatile memory is disclosed in which conflicts between a memory refresh operation, the requirements for access to the memory during a data processing operation and a power up or power down condition are resolved. When a conflict occurs, clock signals are generated to provide a contention refresh operation of the memory with minimum interruption to normal access time between the control processor and the memory.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: February 3, 1981
    Assignee: NCR Corporation
    Inventor: Narendra M. Patel