Notre Dame Patents

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Description

This collection brings together all of the patents assigned to the University of Notre Dame from 1952 to 2020, plus other selected patents prior to 1952. Each record includes a full-text searchable and accessible PDF document for the corresponding invention. The record also includes the present-day academic department with which the inventor was or would have been associated.

Why patents? According to the University’s IDEA Center, “Part of the University’s public service mission is to ensure that the results of its research are made available for public use and benefit. This is accomplished in many ways: through educating students, publishing results of research, and ensuring that inventions are developed into useful products and services for the benefit of the public.”

“Today, our research universities play an even more vital role in creating a better future—not only by educating close to 600,000 graduate students in science and engineering every year, but also, and critically, by performing more than 15% of U.S. R&D in 2011—and according to 2012 NSF data, accounted for the majority (53%) of national basic research. This research, some basic, some applied or ‘translational’ creates new technologies, new products and services, medicines, diagnostics — the list is long and impressive — but also, this research gives rise to entire new industries.” (David Winwood, “The Importance of Patents and Academic Technology Transfer,” March 26, 2015)

The collection also includes the most famous patent associated with Notre Dame, U.S. patent 1,811,959 from 1931, “Vinyl derivatives of acetylene and method of preparing the same” — in other words, synthetic rubber. Invented by Rev. Fr. Julius Nieuwland, CSC, and assigned to DuPont, this patent did, in fact, give rise to entire new industries. More about this invention may be found at the National Inventors Hall of Fame.

These patents are one more example of the University fulfilling Rev. Fr. Sorin’s vision of becoming a “powerful force for good.”

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  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3639348 B2
    Description:

    The copolymers disclosed herein are of propargyl acrylate and methacrylate. Polymerization of propargyl acrylate and methacrylate in free radical systems generally results in crosslinked or gelled products since the free radicals will activate polymerization through the acetylenic as well as through the acrylic unsaturation. Therefore the copolymers are advantageously prepared byanionic polymerization. The comonomers are those which are copolymerizable with acrylates and methacrylates inanion…

    Date Issued:
    1972-02-01
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4058505 B2
    Description:

    Aromatic polyimides with amine end groups are chain-extended (molecular weight increased) by reacting them with aromatic di- or tri- anhydrides. The reaction can either be at a temperature above the melting point of the reactants or in solvents for the reactants. The polyimides can be shaped and formed prior to chain-extending.

    Date Issued:
    1977-11-15
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4026871 B2
    Description:

    Aromatic polyimides with phenolic end groups are chain-extended (molecular weight increased) by reacting them with formaldehyde, compounds capable of generating formaldehyde under the reaction conditions or hexamethylene tetramine in the presence of a catalytic amount of lime. These polyimides can be shaped and formed prior to the chain-extending. The aromatic polyimides appropriate for chain-extending are formed by the reaction of aromatic dianhydrides, aromatic diamines and phenolic compoun…

    Date Issued:
    1977-05-31
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4118377 B2
    Description:

    Processes for increasing the molecular weight of bis-maleimides are provided. The bis-maleimides are reacted with certain cyclic dienes to form reversible adducts. These adducts, upon elimination of the cyclic diene, yield an extension of the bis-maleimides to higher molecular weight polymers, ultimately to thermally stable, infusible polymers. The process can be interrupted to yield tractable polymers which are also convertible to cross-linked, infusible products. Modifications of the proces…

    Date Issued:
    1978-10-03
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 5290908 B2
    Description:

    Aromatic polyimides with acetylenic end groups are cured by coupling together thermally or catalytically using cuprous salts as catalysts to increase molecular weight with little or no by-product formation. These polyimides can be shaped and formed prior to the coupling. The acetylenic end-capped aromatic polyimides are formed by the reaction of an aromatic dianhydride, an acetylenic organic monoamine compound which will provide the reactive end groups and optionally an aromatic diamine.

    Date Issued:
    1994-03-01
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3897395 B2
    Description:

    Aromatic polyimides with reactive end groups are cured by coupling together by addition or condensation to increase molecular weight with little or no by-product formation. These polyimides can be shaped and formed prior to the coupling. The aromatic polyimides appropriate for coupling are formed by the reaction of an aromatic dianhydride and an aromatic diamine in ratios to provide the appropriate end groups, or by including in the reaction mixture a compound which will provide reactive end …

    Date Issued:
    1975-07-29
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3996196 B2
    Description:

    Polyimide-metallo-phthalocyanines and processes for their preparation are provided. The products have the structural formula: ##STR1## where R’ is an aromatic organic radical, the two carbon atoms attached thereto being attached to separate and adjacent carbon atoms in the aromatic radical, M is derived from a polyvalent metal or its salt, said polyvalent metal having an atomic number of at least 12 and G is an aromatic imide of the formula: ##STR2## WHEREIN Ar is a divalent aromatic orga…

    Date Issued:
    1976-12-07
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4197397 B2
    Description:

    Aromatic polyimides with anhydride end groups are chain-extended (molecular weight increased) by reacting them with aromatic diamines or diamine terminated imide oligomers. The reaction can either be at a temperature above the melting point of the reactants or in solvents for the reactants. These polyimides can be shaped and formed prior to chain-extending.

    Date Issued:
    1980-04-08
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3890272 B2
    Description:

    Processes for preparing polyimides from bis-maleimides are provided. In these processes, a bis-maleimide is polymerized in the presence of a catalytic amount (usually about 0.01 to 5% by weight of the bis-maleimide) of an alkali metal salt of a Bronsted acid. Preferably, the polymerization is also conducted in the presence of a small amount (usually 0.01 to 5% by weight of the bis-maleimide) of an activator for the catalyst. The activator is an aprotic organic compound having a dielectric con…

    Date Issued:
    1975-06-17
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3562231 B2
    Description:

    The process disclosed herein is the bromination of polymers of propargyl methacrylate and the brominated products produced thereby. Propargyl methacrylate has a terminal acetylenic group which upon bromination gives anethylenic dibromo derivative which is hydrolytically stable. In comparison the derivative obtained upon dibromination of a polymer of allyl methacrylate gives dibromopropyl methacrylate repeating units whereas the dibromonation of propargyl methacrylate gives dibromoallyl methac…

    Date Issued:
    1971-02-09
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 3890274 B2
    Description:

    Phthalonitrile-terminated aromatic polyimides and polyimide-phthalocyanines are provided. The phthalonitrile-terminated polyimides are prepared by reacting an anhydride end-capped, aromatic polyimide with at least two moles of a dicyano aromatic monoamine to give a polyimide of the structural formula: ##SPC1## Wherein Ar is a divalent aromatic organic radical, Ar’ is a tetravalent aromatic organic radical, the four carbonyl groups being attached directly to separate carbon atoms and each …

    Date Issued:
    1975-06-17
    Record Visibility:
    Public
    Resource Type
    Patent
  • Inventor(s):
    Gaetano Francis D'Alelio
    Patent Number:
    US 4026904 B2
    Description:

    Aromatic epoxy-terminated aromatic polyimides and processes for their preparation are provided. The epoxidized polyimides are prepared by epoxidizing an olefinically unsaturated aromatic imide of the formula: ##STR1## WHEREIN Ar is a divalent aromatic organic radical, Ar’ is a tetravalent aromatic organic radical, the four carbonyl groups being attached directly to separate carbon atoms and each pair of carbonyl groups being attached to adjacent carbon atoms in the Ar’ radical, R’…

    Date Issued:
    1977-05-31
    Record Visibility:
    Public
    Resource Type
    Patent