Patents by Inventor Adriano Mattera

Adriano Mattera 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).

  • Programmable - voltage - generator interface for decreasing the minimum voltage step
    Patent number: 5023801
    Abstract: An interface circuit to the output of a programmable voltage ramp generator for decreasing the minimum voltage step of such a generator having two voltage channels and a minimum voltage step greater than 1 millivolt. The interface circuit receives an input from each of the two voltage channels (V.sub.2, V.sub.3), along with an inserted voltage (V.sub.1). The circuit includes a summing amplifier for (i) compressing the minimum voltage step from one voltage channel (V.sub.2) by a factor equal to or greater than such minimum voltage step, (ii) adding the voltage from the other channel (V.sub.3) to the compressed voltage, and (iii) subtracting the inserted voltage (V.sub.1) (or adding an inserted voltage which is negative). The inserted voltage (V.sub.1) is equal in magnitude to the maximum output value from the voltage channel that has the voltage compressed (V.sub.2). The output of the summing amplifier (V.sub.out) may be represented by:V.sub.out =(V.sub.3 /X)+(V.sub.2 /Y)+(V.sub.
    Type: Grant
    Filed: March 15, 1989
    Date of Patent: June 11, 1991
    Assignees: Montedison S.p.A., Consiglo Nazionale Delle Ricerche
    Inventors: Adriano Mattera, Roberto Fornari, Renato Magnanini, Carolo Paorici, Lucio Zanotti, Giovanni Zuccalli
  • Gallium arsenide single crystals with low dislocation density and high purity
    Patent number: 4776971
    Abstract: Undoped GaAs single crystals with low dislocation density, low impurity content, 0.20-1 Kg in weight and constant diameter of 1"-2" (inches), said single crystals being obtained with LEC technology at low or high pressure with synthesis of the polycrystal in situ and subsequent growth of the single crystal.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: October 11, 1988
    Assignees: Montedison S.p.A., Consiglio Nazionale Delle Ricerche
    Inventors: Adriano Mattera, Roberto Fornari, Renato Magnanini, Carlo Paorici, Lucio Zanotti, Giovanni Zuccalli
  • Process for preparing poly-piperazinamide anisotropic shaped articles
    Patent number: 4560522
    Abstract: Process for preparing poly-piperazinamide, anisotropic shaped articles comprising the preparation of the polymer solution in a polar organic solvent, the transformation of the solution into shaped bodies by spreading or spinning, the gelation of the shaped articles by phase inversion, and, optionally, the heat treatment of the gellified shaped articles.
    Type: Grant
    Filed: June 30, 1983
    Date of Patent: December 24, 1985
    Assignee: Montedison S.p.A.
    Inventors: Catia Bastioli, Giuseppe Gianotti, Adriano Mattera, Paolo Parrini
  • Process for removing soluble boron compounds from aqueous effluents
    Patent number: 4402835
    Abstract: Disclosed is a process for removing boron compounds from aqueous effluents. The effluents are contacted, under stirring, with a divalent metal sulphate Me.sub.I SO.sub.4 and a divalent metal hydroxyde Me.sub.II (OH).sub.2, the sulphate-hydroxyde couple being selected from the group consisting of BeSO.sub.4 --Ba(OH).sub.2 ; BeSO.sub.4 --Sr(OH).sub.2 ; BeSO.sub.4 --Ca(OH).sub.2 ; MgSO.sub.4 --Ba(OH).sub.2 ; MgSO.sub.4 --Sr(OH).sub.2 ; MgSO.sub.4 --Ca(OH).sub.2 ; CaSO.sub.4 --Ba(OH).sub.2 ; CaSO.sub.4 --Sr(OH).sub.2 ; SrSO.sub.4 --Ba(OH).sub.2 ; ZnSO.sub.4 --Ba(OH).sub.2 ; ZnSO.sub.4 --Sr(OH).sub.2 ; ZnSO.sub.4 --Ca(OH).sub.2 ; CdSO.sub.4 --Ba(OH).sub.2 ; CdSO.sub.4 --Sr(OH).sub.2 and CdSO.sub.4 --Ca(OH).sub.2. The sulfate Me.sub.I SO.sub.4 and the hydroxide Me.sub.II (OH).sub.2, by reaction with each other, cause the sulphate Me.sub.II SO.sub.4 and the hydroxide Me.sub.I (OH).sub.2 to precipitate.The amount of Me.sub.II (OH).sub.2 is at least stoichiometric in respect of the amount of Me.sub.I SO.sub.
    Type: Grant
    Filed: November 10, 1981
    Date of Patent: September 6, 1983
    Assignee: Istituto Guido Donegani S.p.A.
    Inventors: Adriano Mattera, Marino Quaglino, Pasqualino Spighi, Massimo Stolfi