Patents by Inventor Peter Graham

Peter Graham 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: 5708433
    Abstract: A digital converter includes a consecutive edge modulator and a noise-shaping circuit. The noise-shaping circuit modifies the input to the consecutive edge modulator in dependence upon values corresponding to the output of the consecutive edge modulator. The noise-shaping circuits apply different respective non-linear functions to samples corresponding to the trailing-edge and leading-edge outputs respectively of the consecutive edge modulator. The noise-shaping circuit may act upon an output simulating the output of the consecutive edge modulator for a given input sample value.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: January 13, 1998
    Inventor: Peter Graham Craven
  • Patent number: 5668137
    Abstract: The invention concerns pharmaceutically useful compounds of the formula I, in which R.sup.1, R.sup.2, R.sup.3, n, m and Het have any of the meanings defined herein, and their pharmaceutically-acceptable salts, and pharmaceutical compositions containing them. The novel compounds possess endothelin receptor antagonist activity and are useful, for example, in the treatment of diseases or medical conditions in which elevated or abnormal levels of endothelin play a significant causative role. The invention further concerns processess for the manufacture of the novel compounds and the use of the compounds in medical treatment.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: September 16, 1997
    Assignee: Zeneca Ltd.
    Inventors: Paul John Phillips, Peter Grahame Ballard, Robert Hugh Bradbury, Roger James
  • Patent number: 5616310
    Abstract: Process for manufacturing an alkali metal aluminosilicate of zeolite P type, wherein sodium silicate solution, sodium aluminate solution and sodium hydroxide are mixed together in a first reacting zone, the mixture reacting to form amorphous aluminosilicate and supersaturated mother liquor and being then transferred from this first reacting zone to a second reacting zone, the transferred mixure having a degree of crystallinity below 30%, preferably 20%, the mixture being afterwards allowed to fully convert into P type zeolite, the resulting product being eventually filtered, washed and dried.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: April 1, 1997
    Assignee: Crosfield Limited
    Inventors: Richard B. Edwards, Peter Graham
  • Patent number: 5560829
    Abstract: Alkali metal aluminosilicate of the zeolite P type having the oxide formula M.sub.2/n O.Al.sub.2 O.sub.3.(1.80-2.66)SiO.sub.2.yH.sub.2 O, y being the water content, proves to have both excellent Calcium Effective Binding Capacity and Calcium Uptake Rate at temperatures below 25.degree. C. The present invention provides for the use of such a zeolite P as a low temperature calcium binder.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: October 1, 1996
    Assignee: Unilever Patent Holdings B.V.
    Inventors: Christopher J. Adams, Abraham Araya, Peter Graham, Andrew T. Hight
  • Patent number: 5495855
    Abstract: A protective shield for a blood sampling unit that is movably engaged to an adapter having a needle attached. The shield attaches to a tube holder when the needle is covered by the shield. Longitudinal grooves on the adapter guide the shield between a first position, covering the needle, and a second, position, exposing the needle. The shield can be locked in either the first position or the second position. The blood sampling unit is safely disassembled or reassembled when the needle is covered by the shield. In an embodiment of the invention, a tip protector, removably attached to the adapter, extends through the length of the tube holder to prevent needlesticks. The blood sampling unit and the tube holder can be assembled and disassembled when the tip protector is attached to the adapter, covering the needle. The tip protector is removed during a clinical procedure and then replaced after the clinical procedure is finished.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: March 5, 1996
    Assignee: Baxter International Inc.
    Inventors: Thomas E. Dudar, Peter Graham
  • Patent number: 5234620
    Abstract: The invention relates to fabric softening clays, detergent compositions comprising clays and processes for producing the clays. The fabric softening clays are dioctahedral 2:1 layer phyllosilicates comprising at least 100 micrograms of lithium per gram of clay mineral. Problems of poor clay color may be overcome.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: August 10, 1993
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Roger Brace, Andrew P. Chapple, Peter Graham
  • Patent number: 5102562
    Abstract: The invention relates to fabric softening clays, detergent compositions comprising clays and processes for producing the clays. The fabric softening clays are dioctahedral 2:1 layer phyllosilicates comprising at least 100 micrograms of lithium per gram of clay mineral. Problems of poor clay color may be overcome.
    Type: Grant
    Filed: May 29, 1990
    Date of Patent: April 7, 1992
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Roger Brace, Andrew P. Chapple, Peter Graham
  • Patent number: 4990816
    Abstract: A piezoelectric capsule with resilient conducting holding means is disclosed, comprising a hollow metal lid (8) fitted on a base body (7) formed of a printed circuit, and a piezoelectric membrane (1) applied against a front step (17) of the lid (8). A resilient electrically conducting element (22), fixed to the base body (7), bears on the metallized external rear face (5) of the piezoelectric ceramic layer (3) of the membrane (1). The resilient element (22) provides simultaneously electric conduction and mechanical holding of the membrane (1) in position.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: February 5, 1991
    Assignee: Horlogerie Photographique Francaise
    Inventors: Pierre Causse, Peter Graham, Bernard Maury, Jean-Claude Walter
  • Patent number: 4978880
    Abstract: A piezoelectric capsule with flat supporting surface and resilient holding means is disclosed, comprising a hollow metal lid (8) fitted on a base body (7) formed of a printed circuit, and a piezoelectric membrane (1) applied against a front step (17) of the lid (8). The resilient holding means (22), fixed to the base body (7), bear on the central zone of the rear face (5) of the membrane (1). The resilient means (22) hodl the membrane (1) mechanically in position and simultaneously provide peripheral sealing by the fact that the corresponding surfaces of the front step (17) and of the membrane (1) are perfectly flat.
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: December 18, 1990
    Assignee: Horlogerie Photographique Francaise Societe Anonyme
    Inventors: Pierre Causse, Peter Graham, Bernard Maury, Jean-Claude Walter
  • Patent number: 4947075
    Abstract: A piezoelectric insert is provided comprising a membrane (1) formed from a substrate (2) and two piezoelectric material layers (3, 4) whose external surfaces are metallized so as to form the electrodes (5, 6). The membrane comprises a radial excrescence (15) whose upper and lower faces are nipped between the clip shaped legs of connectors (22, 23). The electric connection of the electrodes thus requires no soldering.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: August 7, 1990
    Assignee: Horlogerie Photographique Francaise Societe anonyme
    Inventors: Bernard Maury, Jean-Claude Walter, Christian Cognasse, Peter Graham
  • Patent number: 4944017
    Abstract: The present invention provides an insert (1) forming an independent assembly of a coil body (15). The electroacoustic transducer comprises an insert (1) formed of a case with a vibrating membrane (2) and its electric connectors (4, 5) and a coil body (15) distinct and separable from the insert. The coil body can be fitted to the rear face (14) of the insert and comprises axial passages (20, 21) through which the insert connectors (4, 5) pass. Contact pieces (22, 23) provide the electric connection of the coil with the insert connectors.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: July 24, 1990
    Assignee: Horlogerie Photographique Francaise
    Inventors: Christian Cognasse, Peter Graham, Bernard Maury, Jean-Claude Walter
  • Patent number: 4104714
    Abstract: A DC to DC converter is provided which may form part of a battery powered gas ignition system, in which the converter comprises a chopper transistor, a transformer having current sensing circuits in the primary and secondary circuits thereof connected in the form of a relaxation oscillator and preferably a supply voltage sensing circuit for effecting a regulation of the battery current in order to obtain substantially maximum power from the battery throughout its useful life.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: August 1, 1978
    Assignee: Plessey Handel und Investments AG.
    Inventors: Richard Hanley Smith, Peter Graham Laws
  • Patent number: 4076759
    Abstract: Phenols are prepared by decomposing secondary aromatic hydroperoxides in the presence of a compound comprising at least one metal atom or cation or at least one non-metallic cation and at least one moiety derivable from an anion of the formula ##STR1## wherein S is a sulphur atom; Y represents an atom of sulphur or oxygen, or a group of the formula =V--R' wherein V represents an atom of nitrogen or phosphorus and R' is a hydrogen atom or a substituted or unsubstituted hydrocarbyl group; and X is a group of the formula ##STR2## wherein each R represents a substituted or unsubstituted hydrocarbyl group and recovering the required phenol or substituted phenol from the decomposition product.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: February 28, 1978
    Assignee: Burmah Oil Trading Limited
    Inventors: Peter Graham Spencer Field, Ronald Bennett
  • Patent number: 4075250
    Abstract: Phenols are prepared by decomposing aromatic organic hydroperoxides in the presence of a compound comprising at least one metal atom or cation or at least one non-metallic cation and at least one moiety derivable from an anion of the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are each independently a hydrogen atom or a substituted or unsubstituted hydrocarbyl group and Y represents an atom of oxygen or sulphur or a group of the formula ##STR2## wherein R is a hydrogen atom or a substituted or unsubstituted hydrocarbyl group and X is oxygen or sulphur.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: February 21, 1978
    Assignee: Burmah Oil Trading Limited
    Inventors: Peter Graham Spencer Field, Ronald Bennett
  • Patent number: 4067912
    Abstract: Phenols are prepared by decomposing aromatic hydroperoxides in the presence of a catalyst comprising a compound containing a heterocyclic ring of the structure ##STR1## wherein S.sup.1 and S.sup.2 each independently represents a sulphur atom or a sulphoxide or sulphone group.
    Type: Grant
    Filed: July 10, 1975
    Date of Patent: January 10, 1978
    Assignee: Burmah Oil Trading Limited
    Inventors: Peter Graham Spencer Field, Ronald Bennett
  • Patent number: 4042779
    Abstract: A microphone assembly for simulating a plurality of coincident microphones has at least four microphone units mutually disposed at the integration points of an integration rule for the surface of a sphere. In one embodiment, four such microphone units are disposed on respective faces of a regular tetrahedron.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: August 16, 1977
    Assignee: National Research Development Corporation
    Inventors: Peter Graham Craven, Michael Anthony Gerzon
  • Patent number: 4023077
    Abstract: A current sensor provides a positive voltage when a non-desired condition is present, such as rotation of machinery above a predetermined speed, and a gating circuit causes contacts of a relay to close whenever the rotational speed drops below such predetermined speed, that is when the desired condition is achieved. The gating circuit also closes these relay contacts in response to failure of the electrical power to such gating circuit. The circuit includes a P-N-P transistor in series with the relay coil, which transistor is switched on or off by a NAND gate. A low level signal to the base of the P-N-P transistor is provided through the NAND gate when the inputs to the gate are high, thereby providing a fail-safe feature for the relay because one of the NAND gate inputs is provided from the sensor's reference voltage through a Schmitt-trigger circuit.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: May 10, 1977
    Assignee: The Colchester Lathe Company Limited
    Inventor: Peter Graham Long
  • Patent number: D321250
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: October 29, 1991
    Assignee: Baxter International Inc.
    Inventors: Steve C. Jepson, Thomas E. Dudar, Vince C. Desecki, Peter Graham
  • Patent number: D321252
    Type: Grant
    Filed: March 7, 1989
    Date of Patent: October 29, 1991
    Assignee: Baxter International Inc.
    Inventors: Steven C. Jepson, Thomas E. Dudar, Vince C. Desecki, Peter Graham, Michael J. Finley