Patents Assigned to Dart Industries
  • Drinking receptacle cover and valve assembly
    Patent number: 4099642
    Abstract: A cup shaped cover and valve assembly is provided for a drinking receptacle to close off the open top of the receptacle to prevent spilling or splashing of either hot or cold beverages in the receptacle. The cover includes a plate surrounded by a rim, the plate being slightly tilted in the rim so that its top surface slopes between diametrically opposite points on the rim. An elongated opening is provided in the plate adjacent to its lowest level portion and a valve head in turn positioned beneath the plate to close the opening. The valve head is biased against the opening by resilient integral supporting arms secured to the bottom of the plate.
    Type: Grant
    Filed: December 1, 1977
    Date of Patent: July 11, 1978
    Assignee: Dart Industries, Inc.
    Inventor: Orv Nergard
  • Process for the polymerization of .alpha.-olefins
    Patent number: 4095016
    Abstract: A catalyst system comprising (1) a cocrystallized titanium trichloride-aluminum chloride modified with phosphorus oxytrichloride, (2) an organo aluminum compound, and (3) an organic trithiophosphite or trithiophosphate for the production of polymers in high yields and of reduced amorphous polymer content.
    Type: Grant
    Filed: December 15, 1976
    Date of Patent: June 13, 1978
    Assignee: Dart Industries, Inc.
    Inventors: Frederick Elias Carrock, Peter James Perron, Edward August Zukowski
  • Multi-purpose bowl set
    Patent number: 4091953
    Abstract: A stackable bowl and closure combination including two bowl shaped members one of which is substantially larger, i.e. deeper than the other and wherein the shallower of same is adapted to closure the larger in either an upright or inverted position. When the shallower bowl is positioned upon the larger one in an upright position, both bowls may be employed to store foodstuffs, whereas when the former is inverted only the larger bowl will function in a storage sense but the capacity thereof is substantially increased. Furthermore, the smaller of the bowls may be closured and sealed for storage purposes by a generally planar seal employing a peripherally extending U-shaped sealing groove. Likewise, the combined bowls may be used as serving dishes subsequent there separation one from the other.
    Type: Grant
    Filed: September 10, 1975
    Date of Patent: May 30, 1978
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Ethylene-vinyl acetate copolymerization process
    Patent number: 4091200
    Abstract: In the production of ethylene-vinyl acetate copolymers in a free radical catalyst initiated high pressure process, explosive decomposition is prevented by contacting the reactor effluent downstream of the reactor outlet with small amounts of a hindered phenolic compound, separating unreacted monomer from the mixture of copolymer, unreacted monomer and scavenger in a separation zone and recycling the separated monomer to the reactor.
    Type: Grant
    Filed: March 23, 1977
    Date of Patent: May 23, 1978
    Assignee: Dart Industries Inc.
    Inventor: Jan Edmond Vandegaer
  • Combined cup and coaster/cover or the like
    Patent number: D247839
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: May 9, 1978
    Assignee: Dart Industries, Inc.
    Inventor: Harold P. Ashton
  • Container closure or the like
    Patent number: D247848
    Type: Grant
    Filed: May 7, 1976
    Date of Patent: May 9, 1978
    Assignee: Dart Industries, Inc.
    Inventor: Jack V. Croyle
  • Measuring spoon or similar article
    Patent number: D247869
    Type: Grant
    Filed: June 23, 1976
    Date of Patent: May 16, 1978
    Assignee: Dart Industries Inc.
    Inventor: Edward N. Montesi
  • Medical suction instrument
    Patent number: D247915
    Type: Grant
    Filed: June 23, 1976
    Date of Patent: May 16, 1978
    Assignee: Dart Industries Inc.
    Inventor: Charles A. Lahay
  • Electric cooking base and vessel
    Patent number: D247946
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: May 23, 1978
    Assignee: Dart Industries Inc.
    Inventors: David L. Painter, Norman C. Minsky
  • Bowl
    Patent number: D248006
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: May 30, 1978
    Assignee: Dart Industries Inc.
    Inventor: Hubert E. Christian
  • Tumbler or the like
    Patent number: D248075
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: June 6, 1978
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Bowl
    Patent number: D248076
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: June 6, 1978
    Assignee: Dart Industries Inc.
    Inventor: Hubert E. Christian
  • Plate or the like
    Patent number: D248077
    Type: Grant
    Filed: October 28, 1976
    Date of Patent: June 6, 1978
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Electric cooking base and vessel
    Patent number: D248079
    Type: Grant
    Filed: September 20, 1976
    Date of Patent: June 6, 1978
    Assignee: Dart Industries Inc.
    Inventors: David L. Painter, Norman C. Minsky
  • Spice shaker
    Patent number: D248204
    Type: Grant
    Filed: May 20, 1976
    Date of Patent: June 20, 1978
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Serving plate set
    Patent number: D248357
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: July 4, 1978
    Assignee: Dart Industries, Inc.
    Inventor: Robert H. C. M. Daenen
  • Cup
    Patent number: D248358
    Type: Grant
    Filed: December 9, 1976
    Date of Patent: July 4, 1978
    Assignee: Dart Industries, Inc.
    Inventor: Tommy Thomas
  • Ice container
    Patent number: D248361
    Type: Grant
    Filed: July 8, 1976
    Date of Patent: July 4, 1978
    Assignee: Dart Industries, Inc.
    Inventor: Edgar F. Trombly
  • Bagmaker/sealer
    Patent number: D248399
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: July 4, 1978
    Assignee: Dart Industries, Inc.
    Inventors: Bill Dobson, Dave Painter
  • Sofa
    Patent number: D248520
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: July 18, 1978
    Assignee: Dart Industries Inc.
    Inventor: Rodney R. Haynes, Sr.