Patents by Inventor Luis Carvalho

Luis Carvalho 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: 20220377594
    Abstract: The present invention provides a method and system for managing the connections of multiple stations in a Wi-Fi mesh network, using station steering to optimize the overall throughput of the network. The stations are proactively steered depending on the link quality, the network topology and wireless medium occupation, as well as the different equipment capabilities, to ultimately provide the best available throughput. This invention also aims to detect crowded Access Points or frequency bands, and steer stations accordingly towards an efficient load control and traffic management between nodes/Access Points and improved quality of experience.
    Type: Application
    Filed: September 3, 2019
    Publication date: November 24, 2022
    Inventors: Paulo José HENRIQUES DE JESUS, Nelson José VALENTE DA SILVA, João Luís CARVALHO FERREIRA RIBEIRO, João Pedro FERREIRA E PEREIRA, Nuno Miguel ABREU LUÍS, Susana Isabel BARRETO DE MIRANDA SARGENTO
  • Patent number: 10947443
    Abstract: Provided are compositions, methods, and systems that relate to use of viscoelastic surfactant gels in well perforation. A method for well treatment comprising: introducing a viscoelastic surfactant gel into a wellbore; and forming one or more perforation channels in an interval of the wellbore while the viscoelastic surfactant gel is disposed in the wellbore. A method for well treatment comprising: introducing a viscoelastic surfactant gel into a wellbore over an interval of the wellbore to be perforated; disposing a perforating gun into the wellbore such that the viscoelastic surfactant gel is disposed between the perforating gun and a casing of the wellbore; and forming one or more perforation channels in the interval of the wellbore. A downhole perforating system comprising: a perforating gun disposed at a distal end of a work string; and a viscoelastic surfactant gel.
    Type: Grant
    Filed: December 20, 2017
    Date of Patent: March 16, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jose Luis Carvalho Mota, William Walter Shumway
  • Publication number: 20200354621
    Abstract: Provided are compositions, methods, and systems that relate to use of viscoelastic surfactant gels in well perforation. A method for well treatment comprising: introducing a viscoelastic surfactant gel into a wellbore; and forming one or more perforation channels in an interval of the wellbore while the viscoelastic surfactant gel is disposed in the wellbore. A method for well treatment comprising: introducing a viscoelastic surfactant gel into a wellbore over an interval of the wellbore to be perforated; disposing a perforating gun into the wellbore such that the viscoelastic surfactant gel is disposed between the perforating gun and a casing of the wellbore; and forming one or more perforation channels in the interval of the wellbore. A downhole perforating system comprising: a perforating gun disposed at a distal end of a work string; and a viscoelastic surfactant gel.
    Type: Application
    Filed: December 20, 2017
    Publication date: November 12, 2020
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Jose Luis Carvalho Mota, William Walter Shumway
  • Publication number: 20070275936
    Abstract: The invention provides compositions comprising formula 1 steroids, e.g., 16?-bromo-3?-hydroxy-5?-androstan-17-one hemihydrate and one or more excipients, including compositions that comprise a liquid formulation comprising less than about 3% v/v water. The compositions are useful to make improved pharmaceutical formulations. The invention also provides methods of intermittent dosing of steroid compounds such as analogs of 16?-bromo-3?-hydroxy-5?-androstan-17-one and compositions useful in such dosing regimens. The invention further provides compositions and methods to inhibit pathogen replication, ameliorate symptoms associated with immune dysregulation and to modulate immune responses in a subject using the compounds. The invention also provides methods to make and use these immunomodulatory compositions and formulations.
    Type: Application
    Filed: November 28, 2006
    Publication date: November 29, 2007
    Inventors: Clarence Ahlem, James Frincke, Luis Carvalho, William Heggie, Patrick Prendergast, Christopher Reading, Krupakar Thadikonda, Russell Vernon
  • Patent number: 6143161
    Abstract: The present invention refers to a process for the preparation of 4-(des-dimethylamino)-tetracyclines, which compounds have a therapeutical application. The starting tetracyclines are treated with a methylating agent and the resulting trimethylammonium salts are reduced by electrolysis in an aqueous solution at acidic pH, in the presence of an adequate electrolyte. A direct electrical current with a potential of 0.5-1.5 volts is applied between two convenient electrodes until the reaction is complete. The 4-(des-dimethylamino)-tetracyclines are isolated by extraction with an organic solvent.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: November 7, 2000
    Assignee: Hovione Inter Ltd.
    Inventors: William Heggie, Jose Galindro, Pedro Santos, Luis Carvalho