Patents by Inventor Costante Corti

Costante Corti 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).

  • Mineral or synthetic, hydrogen-based greases, having improved properties
    Patent number: 5948737
    Abstract: Greases comprising a mineral and/or synthetic lubricating oil having an hydrogenated basis, a fluoropolyethereal oil and an organic or inorganic thickening agent, wherein the weight ratio lubricating oil+fluoropolyethereal oil/thickening agent ranges from 97:3 to 80:20 and the weight ratio lubricating oil/fluoropolyethereal oil ranges from 95:5 to 60:40.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: September 7, 1999
    Assignee: Ausimont S.p.A.
    Inventors: Padmanabhan Srinivasan, Laura Montagna, Paolo Savelli, Costante Corti
  • Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
    Patent number: 5705668
    Abstract: New phosphazene derivatives, fully substituted by aromatic groups and perfluoropolyethereal chains, are utilized as stabilizers for oils and greases based on perfluoropolyethers. Such derivatives inhibit the degradation process affecting the perfluoropolyethereal chains when these are subjected to high temperatures in an oxidizing atmosphere and in the presence of metals, such as for example aluminium, titanium, vanadium and their alloys, or steels.
    Type: Grant
    Filed: October 30, 1996
    Date of Patent: January 6, 1998
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Odello, Walter Navarrini, Richard Dickinson Chambers, Costante Corti
  • Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
    Patent number: 5602270
    Abstract: New phosphazene derivatives, fully substituted by aromatic groups and perfluoropolyethereal chains, are utilized as stabilizers for oils and greases based on perfluoropoyethers. Such derivatives inhibit the degradation process affecting the perfluoropolyethereal chains when these are subjected to high temperatures in an oxidizing atmosphere and in the presence of metals, such as for example aluminium, titanium, vanadium and their alloys, or steels.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: February 11, 1997
    Assignee: Ausimont S.p.A.
    Inventors: Paolo Odello, Walter Navarrini, Richard D. Chambers, Costante Corti
  • Phosphazene derivatives and use of same as stabilizers for oils and greases based on perfluoropolyethers
    Patent number: 5441655
    Abstract: New phosphazene derivatives, fully substituted by aromatic groups and perfluoropolyethereal chains, are utilized as stabilizers for oils and greases based on perfluoropolyethers. Such derivatives inhibit the degradation process affecting the perfluoropolyethereal chains when these are subjected to high temperatures in an oxidizing atmosphere and in the presence of metals, such as for example aluminum, titanium, vanadium and their alloys, or steels.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: August 15, 1995
    Assignee: Ausimont, S.p.A.
    Inventors: Paolo Odello, Walter Navarrini, Richard D. Chambers, Costante Corti
  • Antirust additives for lubricants or greases based on perfluoropolyethers
    Patent number: 5190681
    Abstract: An antirust additive for lubricants based on perfluoropolyethers, comprising one of the fluoropolyether compounds having functionalized end groups selected from --CN, --CH.sub.2 NR.sub.1 R.sub.2 and ##STR1## and in particular a combination of these with small amounts of a fluoropolyether with acid end groups.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: March 2, 1993
    Assignee: Ausimont S.r.l.
    Inventors: Ezio Strepparola, Piero Gavezotti, Costante Corti
  • Antirust additives for lubricants or greases based on perfluoropolyethers
    Patent number: 5169548
    Abstract: An antirust additive for lubricants based on perfluoropolyethers, comprising one of the fluoropolyether compounds having functionalized end groups selected from --CN, --CH.sub.2 NR.sub.1 R.sub.2 and ##STR1## and in particular a combination of these with small amounts of a fluoropolyether with acid end groups.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: December 8, 1992
    Assignee: Ausimont S.r.l.
    Inventors: Ezio Strepparola, Piero Gavezotti, Costante Corti
  • Perfluoropolyethers having antirust properties, useful as components or additives for lubricating oils and greases
    Patent number: 5000864
    Abstract: Perfluoropolyethers having antirust properties, suitable for being used as lubricating oils or as components of lubricating greases or as antirust additives for lubricating oils and greases based on perfluoropolyethers.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: March 19, 1991
    Assignee: Ausimont S.r.l.
    Inventors: Ezio Strepparola, Costante Corti, Piero Gavezotti, Alba Chittofrati
  • Process for the insertion of perfluoroolefines on perfluoropolyethers and corresponding products
    Patent number: 4500739
    Abstract: Perfluoropolyether comprising, besides --CF.sub.2 -- and --CF.sub.2 F.sub.4 units, also a third fluoroalkylene unit containing three or more carbon atoms, said units being connected to each other through --O-ether bridges, and process for obtaining above said polyether, consisting in reacting a mixture of polyperoxidic perfluoropolyether and a fluorinated olefin, in the presence of U.V. radiations.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: February 19, 1985
    Assignee: Montedison S.p.A.
    Inventors: Gerardo Caporiccio, Gian T. Viola, Costante Corti
  • Processes for preparing perfluoropolyether oils of very high purity and low volatility
    Patent number: 4178465
    Abstract: Perfluoropolyether oils containing traces of H.sub.2 O molecularly dissolved therein are rendered anhydrous and hyperpure by treatment with chlorine trifluoride or monofluoride at a pressure of 1-5 atm. and a temperature of 0.degree.-50.degree. C. after which the treated oil is selectively fractionated.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: December 11, 1979
    Assignee: Montedison S.p.A.
    Inventors: Gerardo Caporiccio, Costante Corti, Giorgio Belardinelli, Giuliano Carniselli