Patents by Inventor Vaseem Firdaus

Vaseem Firdaus 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).

  • High impact LLDPE films
    Patent number: 6458910
    Abstract: Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of molten material, cooling the extruded tube while drawing the tube so cooled, to maintain the tube diameter identical to that of the annular die and expanding the tube or bubble to attenuate the walls thereof by introducing a gas to the interior of the tube or bubble. The resulting films are characterized by superior impact strength and MD tear resistance.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: October 1, 2002
    Assignee: ExxonMobil Oil Corporation
    Inventors: Vaseem Firdaus, Pradeep P. Shirodkar
  • Blends of calcium carbonate and LLDPE
    Patent number: 5922800
    Abstract: Film forming blends, and films thereof, comprise copolymers of ethylene and alpha-olefins of 4 to 10 carbon atoms (LLDPE) containing up to about 35% of calcium carbonate exhibit excellent film impact properties which are sustained over time, without reduction in modulus or stiffness.
    Type: Grant
    Filed: January 31, 1995
    Date of Patent: July 13, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Vincent J. Crotty, Vaseem Firdaus, Frank Herbert Puterbaugh
  • Foamed high density polyethylene
    Patent number: 5916926
    Abstract: Control of polyethylene melt strength and melt viscosity has been used to produce foamed articles.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: June 29, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Kathleen K. Cooper, Vaseem Firdaus, Anthony Poloso, Paul Po-Luk Tong
  • High impact LLDPE films with high stalk extrusion
    Patent number: 5840244
    Abstract: Blown films of linear low density polyethylene are produced by a high stalk process comprising extruding the linear low density polyethylene through an annular die to form an extruded tube of molten material, cooling the extruded tube while drawing the tube so cooled, to maintain the tube diameter identical to that of the annular die and expanding the tube or bubble to attenuate the walls thereof by introducing a gas to the interior of the tube or bubble. The resulting films are characterized by superior impact strength and MD tear resistance.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: November 24, 1998
    Assignee: Mobil Oil Corporation
    Inventors: Vaseem Firdaus, Pradeep P. Shirodkar
  • Binary cocatalyst compositions for activating heterogeneous polymerization catalysts
    Patent number: 5550094
    Abstract: A catalyst composition for copolymerizing ethylene with alpha-olefins is prepared by supporting a magnesium compound and a titanium compound on a solid, inert porous carrier, and activating the precursor with a mixture of dimethylaluminum chloride and a trialkylaluminum compound. Products with a bimodal molecular weight distribution are produced which are free of alpha-olefin oligomers.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: August 27, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Ahmed H. Ali, Vaseem Firdaus, Tomas A. Geoghegan, Yury V. Kissin, Robert I. Mink
  • LLDPE films with improved optical properties
    Patent number: 5258449
    Abstract: A film of a linear low density copolymer of ethylene (LLDPE) having an Mz/Mw ratio of greater than 3.5 and exhibiting excellent optical properties and impact strength.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: November 2, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Vaseem Firdaus, Pradeep P. Shirodkar
  • LLDPE films with improved optical properties
    Patent number: 5210167
    Abstract: A film of a linear low density copolymer of ethylene (LLDPE) having an Mz/Mw ratio of greater than 3.5 and exhibiting excellent optical properties and impact strength.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: May 11, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Vaseem Firdaus, Pradeep P. Shirodkar