Patents by Inventor P. Patel

P. 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: 4717665
    Abstract: Disclosed is a method for causing the dissociation of microbial mycelium and extracellular lipase bound thereto and increasing the measurable activity of the lipase. The method involves treating an aqueous suspension of the mycelium with the anhydride of a dicarboxylic acid which results in dissociation of the mycelium and lipase thereby facilitating recovery of the lipase.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: January 5, 1988
    Assignee: Miles Laboratories, Inc.
    Inventors: Robert L. Charles, Steven C. Dolby, Chimanbhai P. Patel, Jayarama K. Shetty
  • Patent number: 4685089
    Abstract: A semiconductor dynamic memory device has an array of one-transistor cells, with row and column decode to produce a 4-bit wide input or output from the array. Single-bit data-in and data-out terminals for the device are coupled to the 4-bit array input/output in a sequential mode. The row and column addresses are latched when RAS and CAS drop, and the latched address includes the address of the starting bit within the 4-bit sequence for serial I/O. The other three bits follow as CAS is cycled. This starting address is used to set a bit in a 4-bit ring counter, which is then used to cycle through the sequence. To reduce power dissipation, the inverter stages of the ring counter are operated by pulsed clocks generated from the asynchronous memory control clocks received from the CPU.
    Type: Grant
    Filed: August 29, 1984
    Date of Patent: August 4, 1987
    Assignee: Texas Instruments Incorporated
    Inventors: Pravin P. Patel, Roger D. Norwood
  • Patent number: 4636518
    Abstract: Compounds of the general formula: ##STR1## and acid addition salts thereof; in which Ar and Ar.sup.1 which may be the same or different, each represent an aromatic radical which may be substituted one or more times by substituents selected from the following:halogen;lower alkyl;lower alkoxy;alkylenedioxy;aralkoxy;aryloxy;trihalomethyl;carboxy;carboxyalkyl;cyano;carboxamido;di-lower alkylamino;nitro; andlower alkyl sulphonylprovided that one of the groups Ar and Ar.sup.1 carries at least one alkoxy, alkylenedioxy, carboxy or carboxyalkyl substituent; andAlk.sup.1 and Alk.sup.2, which may be the same or different, each represent an alkylene group containing from 1 to 8 carbon atoms which may be substituted one or more times by lower alkyl;X and Y which may be the same or different represent oxygen, nitrogen or sulphur; and in which the imidazole ring may be substituted by one or more lower alkyl substituentshave antithrombotic activity.
    Type: Grant
    Filed: June 20, 1985
    Date of Patent: January 13, 1987
    Assignee: G. D. Searle & Co.
    Inventors: Peter J. Fellner, Mun F. Lai, Thakorbhai P. Patel
  • Patent number: 4567189
    Abstract: Compounds of the general formula: ##STR1## and acid addition salts thereof; in whichAr and Ar.sup.1 which may be the same or different, each represent an aromatic radical which may be substituted one or more times by substituents selected from the following:halogen;lower alkyl;lower alkoxy;alkylenedioxy;aralkoxy;aryloxy;trihalomethyl;carboxy;carboxyalkyl;cyano;carboxamido;di-lower alkylamino;nitro; andlower alkyl sulphonylprovided that one of the groups Ar and Ar.sup.1 carries at least one alkoxy, alkylenedioxy, carboxy or carboxyalkyl substituent; andAlk.sup.1 and Alk.sup.2, which may be the same or different, each represent an alkylene group containing from 1 to 8 carbon atoms which may be substituted one or more times by lower alkyl;X and Y which may be the same or different represent oxygen, nitrogen or sulphur; and in which the imidazole ring may be substituted by one or more lower alkyl substituentshave antithrombotic activitiy.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: January 28, 1986
    Assignee: G. D. Searle & Co.
    Inventors: Peter J. Fellner, Mun F. Lai, Thakorbhai P. Patel
  • Patent number: 4567579
    Abstract: A semiconductor dynamic memory device has an array of one-transistor cells, with row and column decode to produce a 4-bit wide input or output. Single-bit data-in and data-out terminals for the device may be coupled to the 4-bit array input/output in a sequential mode. The row and column addresses are latched when RAS and CAS drop, and this includes the address of the starting bit within the 4-bit sequence. The other three bits follow as CAS is cycled. This starting address is used to set a bit in a 4-bit ring counter, which is then used to cycle through the sequence.
    Type: Grant
    Filed: July 8, 1983
    Date of Patent: January 28, 1986
    Assignee: Texas Instruments Incorporated
    Inventors: Pravin P. Patel, Chitranjan N. Reddy
  • Patent number: 4478566
    Abstract: An apparatus for molding an article, such as a preform, used in making information recorded discs, includes top and bottom mold members having recesses in their approved surfaces. The top mold member is mounted on the end of the piston rod of a pneumatic cylinder which is adapted to move the top mold member into mating relation with the bottom mold member so that the mold recesses form a mold cavity. The bottom mold member includes means for injecting a plastic mold material into the mold cavity. To mold a preform, the top mold member is moved by the pneumatic cylinder toward the bottom mold member to a collapsed position of the mold members where the mold cavity is of a volume less than the desired volume of the preform being molded. Plastic mold material is injected into the mold cavity until it is filled and additional mold material is injected into the mold forcing the top mold member away from the bottom mold member until the cavity is of the desired volume of the preform.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: October 23, 1984
    Assignee: RCA Corporation
    Inventors: John J. Prusak, Bhupendra P. Patel
  • Patent number: 4463849
    Abstract: The video disc caddy comprises a record retaining spine removably received inside an outer protective cover. The spine has an opening for receiving a disc record. Each side of the spine is provided with a pair of oppositely disposed, substantially semicircular wiping pads around the record receiving opening therein.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: August 7, 1984
    Assignee: RCA Corporation
    Inventors: John J. Prusak, Bhupendra P. Patel
  • Patent number: 4436603
    Abstract: An apparatus is disclosed for separating a replica from a matrix. The apparatus consists of a rotatable lower turntable and a movable upper turntable assembly between which the replica and matrix assembly to be separated are clamped during the separation process. A tool is provided to selectively apply pressure to the outer edge of the matrix to cause the seal between the replica and the matrix to be broken and also to provide a gap between the replica and the matrix. A pair of opposing clamp members having an aperture in the jaws of the clamps is inserted into the gap between the replica and the matrix. The clamp members are advanced so as to lock the matrix to the surface of the lower turntable. A pair of upper clamp members which are mounted on the support assembly for the upper turntable are moved into position so as to engage the replica.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: March 13, 1984
    Assignee: RCA Corporation
    Inventors: John J. Prusak, Bhupendra P. Patel
  • Patent number: 4414167
    Abstract: A method for molding an article, such as a preform, used in making information recorded discs, includes use of top and bottom mold members having recesses in their approved surfaces. The top mold member is mounted on the end of the piston rod of a pneumatic cylinder which is adapted to move the top mold member into mating relation with the bottom mold member so that the mold recesses form a mold cavity. The bottom mold member includes means for injecting a plastic mold material into the mold cavity. To mold a preform, the top mold member is moved by the pneumatic cylinder toward the bottom mold member to a collapsed position of the mold members where the mold cavity is of a volume less than the desired volume of the preform being molded. Plastic mold material is injected into the mold cavity until it is filled and additional mold material is injected into the mold forcing the top mold member away from the bottom mold member until the cavity is of the desired volume of the preform.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: November 8, 1983
    Assignee: RCA Corporation
    Inventors: John J. Prusak, Bhupendra P. Patel
  • Patent number: 4394929
    Abstract: A double-walled vacuum insulated cryogenic liquid container wherein the access conduit is composed of a material whose strength increases with decreasing temperature with the conduit having a wall thickness which varies in a manner such that when the container is holding a cryogenic liquid, the ratio of bending moment stress in the conduit due to a selected applied force to the strength of the conduit material is substantially constant along the length of the conduit.
    Type: Grant
    Filed: April 10, 1981
    Date of Patent: July 26, 1983
    Assignee: Union Carbide Corporation
    Inventors: Nandlal P. Patel, Roger J. Dolida
  • Patent number: 4363412
    Abstract: An extremely massive mobile crain counterweight requiring demounting from the crane rotary superstructure for separate transport or storage has self-contained raising and lowering mechanism which may be powered from the crane carrier and which forms a part of the counterweight mass. The internal counterweight mechanism is shielded from ballast, such as shot, which fills the interior of the counterweight. A foot plate forming a part of the raising and lowering mechanism of the counterweight is lockable in extended and retracted positions and is constructed for interlocking engagement with a locator structure on the crane carrier. An efficient and simplified sequence of counterweight manipulating steps is enabled.
    Type: Grant
    Filed: August 14, 1980
    Date of Patent: December 14, 1982
    Assignee: Kidde, Inc.
    Inventors: Ramesh P. Patel, Alfred Bonnell, Jr.
  • Patent number: 4327830
    Abstract: A stamper protector is disclosed which is comprised of a recording cover and a center cover. The recording cover is made of a laminated material which has a tough outer layer and a resilient soft inner layer. The recording cover is cut in the form of an annular ring of a size such that it will cover the entire recorded area of the stamper from the outer molding land to the unrecorded center portion of the stamper. The center cover is cut to a size which will cover the entire center of the recording cover when it is adhered to the outer layer of the recording cover.
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: May 4, 1982
    Assignee: RCA Corporation
    Inventors: Bhupendra P. Patel, John J. Prusak
  • Patent number: 4290769
    Abstract: The present invention is a stabilized Romanowsky type stain solution. The stain solution which comprises azures, Methylene Blue and an eosin dye in methanol is stabilized by the addition thereto of an ammonium halide, a primary, secondary or tertiary alkylamine hydrohalide or a combination thereof.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: September 22, 1981
    Assignee: Miles Laboratories, Inc.
    Inventors: John C. Liao, Chittaranjan P. Patel, John L. Ponzo
  • Patent number: 4226953
    Abstract: Thermoplastic compositions are described comprising blends of styrene-acrylonitrile resin and nitrile rubber of high gel content.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: October 7, 1980
    Assignee: Monsanto Company
    Inventors: Aubert Y. Coran, Raman P. Patel
  • Patent number: 4208496
    Abstract: A paint composition incorporating a fluorochemical surfactant has been found to have excellent dust repellent characteristics when applied to either interior or exterior surfaces.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: June 17, 1980
    Assignee: N L Industries, Inc.
    Inventors: Robert A. Bergfeld, Shashi P. Patel, Lynn M. Schlickenrieder
  • Patent number: 4197379
    Abstract: Elastoplastic compositions are described comprising blends of cross-linked rubber and thermoplastic polyamide.
    Type: Grant
    Filed: December 22, 1977
    Date of Patent: April 8, 1980
    Assignee: Monsanto Company
    Inventors: Aubert Y. Coran, Raman P. Patel
  • Patent number: 4173556
    Abstract: Elastoplastic compositions are described comprising blends of cross-linked rubber and thermoplastic polyamide.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: November 6, 1979
    Assignee: Monsanto Company
    Inventors: Aubert Y. Coran, Raman P. Patel
  • Patent number: 4130766
    Abstract: An improved bucket brigade circuit is disclosed having an improved transfer efficiency and dynamic range. Conventional bucket brigade circuits consist of a chain of storage capacitors and charge transfer circuits functioning as an analog shift register. Due to the nodal capacitance at the first load of prior art circuits, the charge thereon cannot be maintained at an optimum level because of voltage pull-back and charge redistribution during the fall time of the clock pulse. The invention disclosed herein provides an additional capacitor connecting the first node of the circuit to the inverse of the clock waveform, thereby eliminating the voltage pull-back and charge redistribution problem, resulting in an improved charge transfer efficiency and dynamic range for the circuit.
    Type: Grant
    Filed: October 13, 1977
    Date of Patent: December 19, 1978
    Assignee: International Business Machines Corporation
    Inventors: Mukesh P. Patel, Huo-Bing Yin
  • Patent number: D256949
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: September 16, 1980
    Assignee: Emerson Electric Co.
    Inventor: Yogesh P. Patel
  • Patent number: D263494
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: March 23, 1982
    Assignee: Emerson Electric Co.
    Inventors: Randall T. Markum, Yogesh P. Patel