Patents by Inventor Kenneth B Stewart

Kenneth B Stewart 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).

  • Patent number: 6190768
    Abstract: The present invention pertains to fibers comprising; (A) from about 50 to 100 wt % (based on the combined weights of Components A and B) of at least one substantially random interpolymer having an I2 of from about 0.1 to about 1,000 g/10 min, a density greater than about 0.9300 g/cm3, and an Mw/Mn of about 1.5 to about 20; which comprises; (1) from about 0.5 to about 65 mol % of polymer units derived from; (i) at least one vinyl or vinylidene aromatic monomer, or (ii) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, or (iii) a combination of at least one aromatic vinyl or vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and (2) from about 35 to about 99.5 mol % of polymer units derived from ethylene and/or at least one C3-20 &agr;-olefin; and (B) from 0 to about 50% by weight (based on the combined weights of Components A and B) of at least one tackifier.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: February 20, 2001
    Assignee: The Dow Chemical Company
    Inventors: Robert R. Turley, Kenneth B Stewart
  • Patent number: 6156842
    Abstract: The present invention pertains to structures and fabricated articles having shape/reshape behavior (and processes for their preparation) comprising;(A) from about 1 to 100 wt % (based on the combined weights of Components A and B) of at least one substantially random interpolymer having an I.sub.2 of 0.1 to about 1,000 g/10 min and an M.sub.w /M.sub.n of from about 1.5 to about 20, which comprises;(1) from about 38 to about 65 mol % of polymer units derived from;(a) at least one vinyl or vinylidene aromatic monomer, or(b) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, or(c) a combination of at least one aromatic vinyl or vinylidene monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer, and(2) from about 35 to about 62 mol % of polymer units derived from ethylene and/or at least one C.sub.3-20 .alpha.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: December 5, 2000
    Assignee: The Dow Chemical Company
    Inventors: Stephen M. Hoenig, Robert R. Turley, Yunwa W. Cheung, Martin J. Guest, Charles F. Diehl, Kenneth B. Stewart, John Sneddon
  • Patent number: 5955205
    Abstract: Multilayer thermoplastic stretch wrap film having substantial one-sided cling properties is made without the use of polymers with high levels of n-hexane extractables, dissimilar polymer chemistries, or low molecular weight tackifiers. The reverse or cling layer comprises at least one homogeneously branched ethylene polymer composition having a density of about 0.90 g/cc or less and the obverse or non-cling layer comprises an propylene or ethylene polymer composition having a density greater than 0.90 g/cc. The multilayer film is particularly useful for load palletization end-use applications.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 21, 1999
    Assignee: The Dow Chemical Company
    Inventors: David B. Ramsey, Kenneth B. Stewart
  • Patent number: 5840430
    Abstract: Multilayer thermoplastic stretch wrap film having substantial one-sided cling properties is made without the use of polymers with high levels of n-hexane extractables, dissimilar polymer chemistries, or low molecular weight tackifiers. The reverse or cling layer comprises at least one homogeneously branched ethylene polymer composition having a density of about 0.90 g/cc or less and the obverse or non-cling layer comprises an propylene or ethylene polymer composition having a density greater than 0.90 g/cc. The multilayer film is particularly useful for load palletization end-use applications.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 24, 1998
    Assignee: The Dow Chemical Company
    Inventors: David B. Ramsey, Kenneth B. Stewart
  • Patent number: 5792534
    Abstract: The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: August 11, 1998
    Assignee: The Dow Chemical Company
    Inventors: Jacquelyn A. deGroot, Lonnie G. Hazlitt, Pradeep Jain, Seema V. Karande, Laura K. Mergenhagen, Dan G. Moldovan, Kenneth B. Stewart, Nicole F. Whiteman
  • Patent number: 5789029
    Abstract: Multilayer thermoplastic stretch wrap film having substantial one-sided cling properties is made without the use of polymers with high levels of n-hexane extractables, dissimilar polymer chemistries, or low molecular weight tackifiers. The reverse or cling layer comprises at least one homogeneously branched ethylene polymer composition having a density of about 0.90 g/cc or less and the obverse or non-cling layer comprises an propylene or ethylene polymer composition having a density greater than 0.90 g/cc. The multilayer film is particularly useful for load palletization end-use applications.
    Type: Grant
    Filed: January 30, 1996
    Date of Patent: August 4, 1998
    Assignee: The Dow Chemical Company
    Inventors: David B. Ramsey, Kenneth B. Stewart
  • Patent number: 5773106
    Abstract: The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 30, 1998
    Assignee: The Dow Chemical Company
    Inventors: Jacquelyn A. deGroot, Pradeep Jain, Lonnie G. Hazlitt, Seema V. Karande, Laura K. Mergenhagen, Dan G. Moldovan, Kenneth B. Stewart, Nicole F. Whiteman
  • Patent number: 5747594
    Abstract: The subject invention provides a polymer mixture having high heat resistivity, low hexane extractive and controllably lower or higher modulus. The mixture is comprised of at least one first substantially linear ethylene polymer, Component (A), and at least one second ethylene polymer which is a homogeneously branched polymer, heterogeneously branched linear polymer or a non-short chain branched linear polymer. When fabricated into film, the mixture is characterized by a heat seal initiation temperature which is substantially lower than its Vicat softening point as well as a high ultimate hot tack strength. When fabricated as a molded article, the mixture is characterized by high microwave warp distortion while maintaining a lower modulus. The polymer mixture is particularly well-suited for use in multilayer film structures as a sealant layer for such applications as cook-in packages, hot-fill packages, and barrier shrink films.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: May 5, 1998
    Assignee: The Dow Chemical Company
    Inventors: Jacquelyn A. deGroot, Lonnie G. Hazlitt, Pradeep Jain, Seema V. Karande, Laura K. Mergenhagen, Dan G. Moldovan, Kenneth B. Stewart, Nicole F. Whiteman