Patents by Inventor Valentine Y. Yoon

Valentine Y. Yoon 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: 9259598
    Abstract: Aqueous dispersions of crystalline polymers based on hydrophobic monomers, preferably on a mixture of hydrophobic and hydrophilic monomers which contains a crosslinking monomer, particularly side chain crystalline (SCC) polymers. The dispersions are useful for providing coatings on substrates, particularly on seeds (whose dormancy is thus extended) and on fibrous substrates, particularly human hair (which thus becomes heat-settable).
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: February 16, 2016
    Assignee: Landec, Inc.
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Patent number: 7175832
    Abstract: Aqueous dispersions of crystalline polymers based on hydrophobic monomers, preferably on a mixture of hydrophobic and hydrophilic monomers which contains a crosslinking monomer, particularly side chain crystalline (SCC) polymers. The dispersions are useful for providing coatings on substrates, particularly on seeds (whose dormancy is thus extended) and on fibrous substrates, particularly human hair (which thus becomes heat-settable).
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: February 13, 2007
    Assignee: Landec Corporation
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Patent number: 7169451
    Abstract: Novel gas-permeable membranes which are particularly useful in the packaging of fresh cut fruit and vegetables, and other respiring biological materials. The membranes have an O2 permeability of at least 775,000 ml/m2.atm.24 hrs, a P10 ratio of at least 1.3, and a ratio of CO2 permeability to O2 permeability (R) of at least 1.5, and are made by forming thin polymeric coatings on microporous polymeric films. Preferred coating polymers are side chain crystalline polymers. Preferred microporous films contain inorganic fillers, particularly such films based on ultrahigh molecular weight polyethylene or polypropylene. FIG. 1 illustrates how O2 permeability and R ratio vary for different coating polymers and microporous films.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: January 30, 2007
    Assignee: Landec Corporation
    Inventors: Raymond Clarke, Ray F. Stewart, Valentine Y. Yoon, Donald A. Schultz, Bradley McClary
  • Publication number: 20030147946
    Abstract: Aqueous dispersions of crystalline polymers based on hydrophobic monomers, preferably on a mixture of hydrophobic and hydrophilic monomers which contains a crosslinking monomer, particularly side chain crystalline (SCC) polymers. The dispersions are useful for providing coatings on substrates, particularly on seeds (whose dormancy is thus extended) and on fibrous substrates, particularly human hair (which thus becomes heat-settable).
    Type: Application
    Filed: December 17, 2002
    Publication date: August 7, 2003
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Patent number: 6540984
    Abstract: Aqueous dispersions of crystalline polymers based on hydrophobic monomers, preferably on a mixture of hydrophobic and hydrophilic monomers which contains a crosslinking monomer, particularly side chain crystalline (SCC) polymers. The dispersions are useful for providing coatings on substrates, particularly on seeds (whose dormancy is thus extended) and on fibrous substrates, particularly human hair (which thus becomes heat-settable).
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: April 1, 2003
    Assignee: Landec Corporation
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Publication number: 20020054969
    Abstract: Novel gas-permeable membranes which are particularly useful in the packaging of fresh cut fruit and vegetables, and other respiring biological materials. The membranes have an O2 permeability of at least 775,000 ml/m2.atm.24 hrs, a P10 ratio of at least 1.3, and a ratio of CO2 permeability to O2 permeability (R) of at least 1.5, and are made by forming thin polymeric coatings on microporous polymeric films. Preferred coating polymers are side chain crystalline polymers. Preferred microporous films contain inorganic fillers, particularly such films based on ultrahigh molecular weight polyethylene or polypropylene. FIG. 1 illustrates how O2 permeability and R ratio vary for different coating polymers and microporous films.
    Type: Application
    Filed: October 12, 2001
    Publication date: May 9, 2002
    Inventors: Raymond Clarke, Ray F. Stewart, Valentine Y. Yoon, Donald A. Schultz, Bradley McClary
  • Patent number: 6376032
    Abstract: Novel gas-permeable membranes which are particularly useful in the packaging of fresh cut fruit and vegetables, and other respiring biological materials. The membranes have an O2 permeability of at least 775,000 ml/m2.atm.24 hrs, a P10 ratio of at least 1.3, and a ratio of CO2 permeability to O2 permeability (R) of at least 1.5, and are made by forming thin polymeric coatings on microporous polymeric films. Preferred coating polymers are side chain crystalline polymers. Preferred microporous films contain inorganic fillers, particularly such films based on ultrahigh molecular weight polyetheylene or polypropylene. FIG. 1 illustrates how O2 permeability an R ratio vary for different coating polymers and microporous films.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: April 23, 2002
    Assignee: Landec Corporation
    Inventors: Raymond Clarke, Ray F. Stewart, Valentine Y. Yoon, Donald A. Schultz, Bradley McClary
  • Publication number: 20010014310
    Abstract: Aqueous dispersions of crystalline polymers based on hydrophobic monomers, preferably on a mixture of hydrophobic and hydrophilic monomers which contains a crosslinking monomer, particularly side chain crystalline (SCC) polymers. The dispersions are useful for providing coatings on substrates, particularly on seeds (whose dormancy is thus extended) and on fibrous substrates, particularly human hair (which thus becomes heat-settable).
    Type: Application
    Filed: January 18, 2001
    Publication date: August 16, 2001
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Patent number: 6199318
    Abstract: Crystalline polymers are prepared as a latex, and are useful for coating fibrous materials such hair and fabrics. The latex can have a high solids content greater than 30%, a residual monomer content of less than 1%, and can be used for repeatedly setting fibrous materials into desired configurations. The latex is also useful for coating organisms such as seeds. The particulate coating extends the dormancy of the organism and/or protects the organism, and is easily shed by a germinating seed. The coating can contain a seed coating additive, such as a colorant or fungicide.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: March 13, 2001
    Assignee: Landec Corporation
    Inventors: Ray F. Stewart, Natarajan Balachander, Steven P. Bitler, Loc Phan, Valentine Y. Yoon
  • Patent number: 5807291
    Abstract: Orthopedic casts which comprise an elastically deformed support which is held in its elastically deformed state by a solid casting composition. After the cast has been placed around a patient's limb, it is heated to soften the casting composition, thus permitting recovery of the cast into conforming contact with the limb. The support can for example be a fabric knitted from elastomeric fibers and glass fiber yarns. The casting composition can for example comprise polycaprolactone and/or a side chain crystallizable polymer, which melts at 45.degree.-60.degree. C. A padded liner can be placed between the cast and the limb. Recovery of the cast is preferably carried out by means of a hot air gun.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: September 15, 1998
    Inventors: Andrew W. Larson, Steven P. Bitler, Lawrence C. Greene, David D. Taft, Ray F. Stewart, Valentine Y. Yoon, Thomas W. Ross, David A. Kamp, Edward E. Schmitt
  • Patent number: 5783302
    Abstract: TPE's which comprise A blocks or B blocks or both A blocks and B blocks, which are crystalline and in which at least a part of the crystallinity result from the presence of crystallizable side chains. Such crystalline blocks are referred to as SCC blocks. TPE's containing SCC A blocks are novel and as such form part of the present invention. The invention also includes processes, compositions, shaped articles and assemblies which make use of TPE's containing SCC A blocks.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: July 21, 1998
    Assignee: Landec Corporation
    Inventors: Steven P. Bitler, Raymond Clarke, David A. Kemp, Ray F. Stewart, Valentine Y. Yoon, Robert G. Freelin
  • Patent number: 5752926
    Abstract: Orthopedic casts which comprise an elastically deformed support which is held in its elastically deformed state by a solid casting composition. After the cast has been placed around a patient's limb, it is heated to soften the casting composition, thus permitting recovery of the cast into conforming contact with the limb. The support can for example be a fabric knitted from elastomeric fibers and glass fiber yarns. The casting composition can for example comprise polycaprolactone and/or a side chain crystallizable polymer, which melts at 45.degree.-60.degree. C. A padded liner can be placed between the cast and the limb. Recovery of the cast is preferably carried out by means of a hot air gun.
    Type: Grant
    Filed: November 9, 1993
    Date of Patent: May 19, 1998
    Assignee: Landec Corporation
    Inventors: Andrew W. Larson, Steven P. Bitler, Lawrence C. Greene, David D. Taft, Ray F. Stewart, Valentine Y. Yoon, Thomas W. Ross, David A. Kamp, Edward E. Schmitt
  • Patent number: 5665822
    Abstract: Thermoplastic elastomers (TPEs) containing side chain crystalline (SCC) blocks. The SCC blocks my be hard (A) blocks or the soft (B) blocks (or both) in the TPE. Some of these TPEs are novel, e.g. those in which A blocks are SCC blocks, and the B blocks are polyethers, polyacrylates, polyamides, polyurethanes or polysiloxanes. The SCC-containing TPEs are particularly useful as matrix materials for other components which are dispersed therein, e.g. energetic solids and other thermally responsive materials.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: September 9, 1997
    Assignee: Landec Corporation
    Inventors: Steven P. Bitler, Ray F. Stewart, David A. Kamp, Robert G. Freelin, Valentine Y. Yoon