Patents by Inventor Francois t' Sas
Francois t' Sas 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).
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Patent number: 10085721Abstract: A method of imaging a blood vessel includes delivering a bubble-based contrast agent within the vessel and positioning at least one ultrasound device in the vicinity of the bubble-based contrast agent within the vessel. A first burst of low-frequency ultrasound energy can be delivered to excite the bubble-based contrast agent into oscillation within the vessel, and a second burst of high-frequency ultrasound energy can be delivered at the excited bubble-based contrast agent. A return signal from the burst of high-frequency ultrasound energy can be received and processed to obtain one or more images.Type: GrantFiled: February 14, 2017Date of Patent: October 2, 2018Assignee: University of Pittsburgh - Of the Commonwealth System of Higher EducationInventors: Xucai Chen, Francois T. H. Yu, Flordeliza S. Villanueva
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Patent number: 9603582Abstract: A method of imaging a blood vessel includes delivering a bubble-based contrast agent within the vessel and positioning at least one ultrasound device in the vicinity of the bubble-based contrast agent within the vessel. A first burst of low-frequency ultrasound energy can be delivered to excite the bubble-based contrast agent into oscillation within the vessel, and a second burst of high-frequency ultrasound energy can be delivered at the excited bubble-based contrast agent. A return signal from the burst of high-frequency ultrasound energy can be received and processed to obtain one or more images.Type: GrantFiled: August 24, 2012Date of Patent: March 28, 2017Assignee: University of Pittsburgh—Of the Commonwealth System of Higher EducationInventors: Xucai Chen, Francois T. H. Yu, Flordeliza S. Villanueva
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Publication number: 20040011912Abstract: The invention relates to a device for automatically changing threadlike materials in a thread processing machine, comprising connecting means to connect a first thread (100) being guided from a supply to said thread processing machine, with a second thread (200) and cutting means (127) to cut said first thread through between the connecting point of the threads and the supply. The problem of the present device is, that the thread (100, 200) does not stay in a position to be selected after it has been cut through and clamped. Therefore the device (1) according to the invention is provided for keeping the first thread (100), originating from the supply, within reach of the connecting means (8, 9) after it has been cut through, in order to keep said first thread (100) in a position.Type: ApplicationFiled: April 3, 2003Publication date: January 22, 2004Inventor: Francois t' Sas
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Patent number: 5475394Abstract: In a flat plate antenna, insertion loss is reduced significantly by providing an extensive waveguide structure at the back of the ground plane of the antenna. Depending on antenna size, the waveguide may feed the antenna at one or a plurality of points. According to a preferred embodiment, the transition from waveguide to stripline is made via a coaxial connection, with a quarter-wave transformation, including mode suppression walls to direct the energy more efficiently. Alternatively, a direct waveguide to stripline transition may be provided. The technique has wide applicability to a number of antenna designs, including single- and dual-polarization structures, and linear and circular polarization operation.Type: GrantFiled: August 18, 1994Date of Patent: December 12, 1995Assignee: Comsat CorporationInventors: Eric C. Kohls, Robert M. Sorbello, Bernard D. Geller, Francois T. Assal
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Patent number: 5220320Abstract: A "modified rearrangeable" switch matrix combines both .beta. switching elements and crossbar switch matrices in a single switch configuration, with .beta. switching elements used at the input and output and at least one crossbar switch matrix in the middle to receive its inputs from .beta. switching elements and provide its outputs to .beta. switching elements.Type: GrantFiled: February 10, 1992Date of Patent: June 15, 1993Assignee: COMSATInventors: Francois T. Assal, John V. Evans, Christoph E. Mahle, Amir I. Zaghloul, Ramesh K. Gupta
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Patent number: 4931802Abstract: On-board satellite switching is performed in three stages, an outer stage of switching on the up-link side for routing the received signals to either demodulators or frequency translators, a first inner stage of switching, preferably a baseband switch and processor, for routing and processing the outputs of the demodulators, a second inner stage of switching, e.g., a microwave switch matrix, for routing the outputs of the frequency translators, and an outer stage on the down-link side for assembling and routing the down-link spot beams. For a multiple hopping-beam system, the outer stages are microwave switch matrices, and for a hybrid scanning-hopping system the outer stages are beam forming matrices. A general purpose modified rearrangeable switch matrix is also disclosed.Type: GrantFiled: March 11, 1988Date of Patent: June 5, 1990Assignee: Communications Satellite CorporationInventors: Francois T. Assal, John V. Evans, Christoph E. Mahle, Amir I. Zaghloul, Ramesh K. Gupta
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Patent number: 4868886Abstract: In antenna arrays having normally unexcited or little-excited elements, a technique for configuring the array to provide both global and spot beam coverage, wherein the normally unexcited or little-excited elements are excited at a higher level, together with other normally excited elements to provide spot beam coverage, the normally unexcited elements being left unexcited to provide global beam coverage. Ring redundancy configurations for amplifiers in a transponder provided in the configuration are optimized to minimize additional hardware requirements. The specific example of the INMARSAT II satellite system is discussed.Type: GrantFiled: June 14, 1988Date of Patent: September 19, 1989Assignee: Communication Satellite CorporationInventors: Francois T. Assal, Amir I. Zaghloul
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Patent number: 4637017Abstract: A method of measuring input-backoff to an amplifier in a time-division multiple access (TDMA) communication system having a carrier recovery segment and a clock recovery segment prior to a data segment in a traffic burst. A monitoring station transmits a CW pilot signal within the amplifier's bandwidth. In the guard time between bursts, the monitoring station measures the unsuppressed pilot level output by the amplifier. While a ground station is transmitting an unmodulated carrier during carrier recovery or a carrier modulated at the clock frequency during clock recovery, the monitoring station measures the suppressed pilot level, suppressed by the non-linear interaction of pilot and carrier. The amount of pilot suppression is related to the input power back-off of the carrier by a previously measured or a theoretically derived relationship.Type: GrantFiled: May 21, 1984Date of Patent: January 13, 1987Assignee: Communications Satellite CorporationInventors: Francois T. Assal, Arnold L. Berman, Janaki R. Potukuchi
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Patent number: 4458618Abstract: The device renders unsinkable a boat such as a habitable boat having a cabin and a cockpit. The device comprises three inflatable envelopes two of which are placed on starboard side and port side bunks respectively whereas the other envelope is placed on the floor of the cabin between the two bunks. A compressed gas container controlled by a valve is connected to all the envelopes for inflating the envelopes when required.Type: GrantFiled: February 10, 1982Date of Patent: July 10, 1984Assignee: Rosa Tuffier nee BoubisInventor: Francois T. N. Tuffier
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Patent number: 4346090Abstract: 13-Chloro-octahydrobanzo[6,7]cyclohepta[1,2,3-de]pyrido[2,1-a]isoquinolin-5 -ols, substituted on the piperidine ring with lower alkyl or a cycloalkyl are disclosed. The compounds are useful CNS depressants. Methods for their preparation and use also are disclosed.Type: GrantFiled: July 21, 1977Date of Patent: August 24, 1982Assignee: Ayerst, McKenna & Harrison Ltd.Inventors: Leslie G. Humber, Francois T. Bruderlein, Andre A. Asselin
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Patent number: 4267538Abstract: A microwave PIN diode switch is provided with circuitry to achieve impedance matching at both input and output ports and for both "on" and "off" switching states.Type: GrantFiled: December 3, 1979Date of Patent: May 12, 1981Assignee: Communications Satellite CorporationInventors: Francois T. Assal, Arnold L. Berman, Khodadad Betaharon
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Patent number: 4151489Abstract: A four-port waveguide switch is described which allows any two pairs of ports to be connected together. A separate waveguide independently connects each port with each of the remaining ports. In each of the six separate waveguides there is provided at least one resonant cavity having a passband that includes the frequencies of the incident microwave signals to be switched. A disrupting structure is provided for each resonant cavity. Each disrupting structure may be switched between a first state wherein the respective cavity is not detuned and a second state wherein the respective cavity is detuned such that it reflects the incident microwave signals. By switching the appropriate disrupting structures to their second state, any of the three possible connecting states of a four port switch of the present invention can be obtained.Type: GrantFiled: November 15, 1977Date of Patent: April 24, 1979Assignee: Communications Satellite CorporationInventors: Arnold L. Berman, Christoph E. Mahle, Francois T. Assal
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Patent number: 4062851Abstract: An efficient, commercially feasible process for the resolution of the organic bases, (.+-.)-(4a,13b-trans)-(3-hydroxy,13b-trans)-3-isopropyl-2,3,4,4a,8,9,13b,1 4-octahydro-1H-benzo[6,7]cyclohepta[1,2,-3-de)pyrido[2,1-a]isoquinolin-3-ol and (.+-.)-(4a,13b-trans)-(3-hydroxy,13b-trans)-3-tert-butyl-2,3,4,4a,8,9,13b, 14-octahydro-1H-benzo[6,7]cyclohepta[1,2,3-de]pyrido[2,1-a]isoquinolin-3-ol , known neuroleptic agents, is disclosed. The process comprises resolving the racemic organic bases with L-(+)-tartaric acid to obtain directly the pure L-(+) tartrate of the (+)-enantiomer and converting the latter salt to the corresponding (+)-enantiomer free base.Type: GrantFiled: November 26, 1975Date of Patent: December 13, 1977Assignee: Ayerst McKenna and Harrison Ltd.Inventors: Karel Pelz, Francois T. Bruderlein, Leslie G. Humber
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Patent number: 4059585Abstract: Disclosed is a process for preparing (4a,13b-trans)-1,2,4,4a,8,9,13b,14-octahydro-3H-benzo[6,7]cyclohepta[1,2,3 -de]-pyrido[2,1-a]isoquinolin-3-one involving a 1,3-cycloaddition of a 4-halo-1-butene to 1,7,8,12b-tetrahydrobenzo[1,2]cyclohepta-[3,4,5-de]isoquinoline N-oxide.Type: GrantFiled: July 27, 1976Date of Patent: November 22, 1977Assignee: Ayerst McKenna and Harrison Ltd.Inventor: Francois T. Bruderlein
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Patent number: 4054569Abstract: Octahydrobenzo[6,7]-(or [5,6]-)cyclohepta-[1,2,3-de]pyrido-(or pyrrolo-)[2,1-a]isoquinolines, and decahydrobenzo[6,7]-(or[5,6]-)cyclohepta[1,2,3-de]-azepino[2,1-a]isoquinol ines and derivatives thereof, optionally substituted on the pyrrolidine, piperidine or azepine ring. The compounds are useful CNS depressants, anticonvulsant and antiinflammatory agents, and methods for their preparation and use are also disclosed.Type: GrantFiled: May 17, 1976Date of Patent: October 18, 1977Assignee: Ayerst McKenna & Harrison Ltd.Inventors: Francois T. Bruderlein, Leslie G. Humber
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Patent number: 3985751Abstract: Octahydrobenzo[6,7]- (or [5,6]-) cyclohepta-[1,2,3-de]pyride- (or pyrrolo-) [2,1-a]isoquinolines, and decahydrobenzo[6,7]- (or [5,6]-) cyclohepta[1,2,3-de]-azepino[2,1-a]isoquinolines and derivatives thereof, optionally substituted on the pyrrolidine, piperidine or azepine ring. The compounds are useful CNS depressants, anticonvulsant and antiinflammatory agents, and methods for their preparation and use are also disclosed.Type: GrantFiled: October 29, 1974Date of Patent: October 12, 1976Assignee: Ayerst McKenna and Harrison Ltd.Inventors: Francois T. Bruderlein, Leslie G. Humber