Patents Assigned to Dart Industries Inc.
  • Patent number: 4331587
    Abstract: A resin stabilizer composition which essentially contains:(a) an organotin sulfur-containing compound, for example, organotin mercaptides, organotin mercaptoacids, organotin mercaptoacid esters, organotin sulfides, organothiostannoic acids and the like, and(b) a metal compound from one of the groups of(1) an alkali metal bisulfite, carbonate, hydroxide, oxide, thiocarbonate bicarbonate, or metabisulfite, and(2) an alkaline earth metal oxide or hydroxide.These compositions remarkably contribute to the long term heat stability of vinyl halide resins. Furthermore, among other advantages, significant economies and synergistic resin heat stabilization are offered by these stabilizer compositions.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: May 25, 1982
    Assignee: Dart Industries, Inc.
    Inventors: Thomas C. Jennings, Charles W. Fletcher, Jr.
  • Patent number: 4307759
    Abstract: A measuring and transferring device for automatically metering predetermined and variable quantities of virgin plastic material, reprocessed plastic material and color concentrate to an extrusion machine. This masterbatch material blender incorporates a rotary conveyor having openings therein that receive and retain predetermined amounts of virgin plastic material and color concentrate in one position of movement of the conveyor and discharge same to the extruder in yet another position of movement thereof. Furthermore, such conveyor is adapted to control yet another reciprocable metering and transfer mechanism that similarly controls the addition of reprocessed material to the batch by way of the same measuring and transferring device.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: December 29, 1981
    Assignee: Dart Industries Inc.
    Inventor: Vincent S. La Bianca
  • Patent number: 4307027
    Abstract: Metallic salts of higher molecular weight fatty acids are produced in a continuous process by feeding fatty acid and base into a plug flow reactor to maintain a residence time of about 2 to about 60 minutes at a temperature of about 75.degree. F. to about 280.degree. F. to obtain a metallic salt, then grinding the metallic salt in a hammer mill to obtain coarse particles and then grinding the coarse particles in a jet mill to obtain fine particles of the metallic salt. Optionally, the fatty acid and base may be fed initially into a stirred-tank reactor to maintain a residence time of about 10 to about 80 minutes at a temperature of from about 115.degree. F. to about 300.degree. F. to initiate metallic salt reaction before feeding the metallic salt reaction mixture into the plug flow reactor.
    Type: Grant
    Filed: March 10, 1980
    Date of Patent: December 22, 1981
    Assignee: Dart Industries Inc.
    Inventors: Richard D. Borzelli, Joseph Cunder
  • Patent number: 4303173
    Abstract: An open top receptacle with a laterally extending handle on one side is arranged to receive a cup-shaped cover. This cover includes a valve assembly to close off an opening in the top of the cover to prevent spilling or splashing of either hot or cold beverages from the receptacle. The valve assembly in turn includes a valve head biased against the opening in the cover by resilient integral supporting arms secured to the underside of the cover. An actuating member passes into one side of the cover at a point spaced 90.degree. from the opening, this point being generally vertically above the lateral handle on the receptacle. With this arrangement, a person can hold the handle of the receptacle in the manner of a mug using the thumb to depress the actuating member inwardly which action moves the valve head away from the opening in the cover to permit drinking of the beverage in the receptacle.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: December 1, 1981
    Assignee: Dart Industries Inc.
    Inventor: Orv B. Nergard
  • Patent number: D261715
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: November 10, 1981
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D261874
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: November 17, 1981
    Assignee: Dart Industries Inc.
    Inventor: Abraham I. Tenzer
  • Patent number: D261976
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: November 24, 1981
    Assignee: Dart Industries Inc.
    Inventor: Rino Conti
  • Patent number: D262337
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: December 22, 1981
    Assignee: Dart Industries, Inc.
    Inventors: Robert F. Bateman, Ann K. Fritz, Rino Conti
  • Patent number: D262684
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: January 19, 1982
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D262839
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: February 2, 1982
    Assignee: Dart Industries Inc.
    Inventors: Robert H. C. M. Daenen, Pieter K. J. De Coster
  • Patent number: D262932
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: February 9, 1982
    Assignee: Dart Industries Inc.
    Inventor: Robert H. C. M. Daenen
  • Patent number: D262995
    Type: Grant
    Filed: December 7, 1978
    Date of Patent: February 9, 1982
    Assignee: Dart Industries Inc.
    Inventors: Rodolfo Gaba, David C. Garland, James L. Pacek
  • Patent number: D263059
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: February 16, 1982
    Assignee: Dart Industries Inc.
    Inventors: Jack V. Croyle, Rino Conti
  • Patent number: D263243
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: March 2, 1982
    Assignee: Dart Industries Inc.
    Inventor: Joan K. Creamer
  • Patent number: D263932
    Type: Grant
    Filed: August 16, 1979
    Date of Patent: April 20, 1982
    Assignee: Dart Industries Inc.
    Inventors: Robert H. C. M. Daenen, Pieter K. J. De Coster
  • Patent number: D264527
    Type: Grant
    Filed: February 19, 1980
    Date of Patent: May 25, 1982
    Assignee: Dart Industries Inc.
    Inventors: Masao Kato, Rino Conti
  • Patent number: D264557
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: May 25, 1982
    Assignee: Dart Industries Inc.
    Inventors: Van D. Groenewold, Hubert E. Christian, James P. Schwartz
  • Patent number: D264791
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: June 8, 1982
    Assignee: Dart Industries Inc.
    Inventor: Rino Conti
  • Patent number: D264792
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: June 8, 1982
    Assignee: Dart Industries Inc.
    Inventor: Rino Conti
  • Patent number: D264794
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: June 8, 1982
    Assignee: Dart Industries Inc.
    Inventors: Ann K. Fritz, Peggy J. Bridges