Patents by Inventor Dean V. Phan

Dean V. Phan 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: 6540880
    Abstract: An apparatus and process for imprinting a web. A yankee drum and pressure roll are juxtaposed to form a nip. An imprinting member, such as through air drying belt or other patterning belt is interposed in the nip. A felt is also interposed in the nip, contacting the backside of the imprinting member. The imprinting member carries a paper web. The paper web is imprinted in the nip and simultaneously transferred to the yankee drying drum. The nip may be formed with a vacuum roll juxtaposed with the felt. The vacuum roll may remove from the felt and hence the web.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: April 1, 2003
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan, Robert S. Ampulski
  • Patent number: 5635028
    Abstract: Soft creped tissue paper products comprising papermaking fibers and a crepe facilitating composition are disclosed. The crepe facilitating composition comprises a bonding inhibitor, a cationic starch and a carboxymethyl cellulose. Preferably, the bonding inhibitor is a quaternary ammonium compound. The use of a bonding inhibitor, a cationic starch and a carboxymethyl cellulose results in a creped tissue paper that is both strong and soft. A creped papermaking process comprising the addition of the crepe facilitating composition is also disclosed. The crepe facilitating composition offers the potential to improve production capacity.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: June 3, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth D. Vinson, Paul T. Weisman, Dean V. Phan
  • Patent number: 5624532
    Abstract: Tissue paper having an enhanced bulk softness through incorporation of an effective amount of a polyhydroxy compound is disclosed. Preferably, from about 0.1% to about 2.0% of the polyhydroxy compound, on a dry fiber weight basis. These nonionic compounds have high rates of retention when applied to wet tissue paper webs according to the process described herein. Tissue embodiments of the present invention may further comprise a quantity of strength additive, such as starch, to increase paper strength.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: April 29, 1997
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan
  • Patent number: 5585092
    Abstract: The present invention relates to a gel deodorant composition comprising: (a) from about 0.001% to about 50%, by weight of the composition, of deodorant active, fragrance, or combination thereof; (b) from about 0.01% to about 15%, by weight of the composition, of a soap gelling agent selected from the group consisting of salts of C.sub.12 -C.sub.40 fatty acids, and combinations thereof; (c) from about 3% to about 50%, by weight of the composition, of glycerol, a polymer of glycerol, wherein said polymer has a weight average molecular weight of about 800 or less, or combinations thereof; (d) from about 5% to about 70%, by weight of the composition, of one or more low molecular weight polyoxyethylene compounds having a structure according to Formula (I): ##STR1## wherein n is the interger 2, 3, 4, 5, 6, 7, or 8; R and R.sup.1 are, independently, hydrogen; alkyl; or--C(.dbd.O)R.sup.2, where R.sup.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: December 17, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Angie Trandai, Milan M. Jevtitch, Dean V. Phan, Paulette L. Warner
  • Patent number: 5556509
    Abstract: A paper structure having at least three regions is disclosed. The paper structure has a first region, a patterned second region, and a third transition region connecting the first and second regions. The first and second regions are disposed at different elevations, and can each have a thickness less than a thickness of the transition region. An apparatus and process for making such a paper structure are also disclosed.
    Type: Grant
    Filed: June 29, 1994
    Date of Patent: September 17, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan
  • Patent number: 5549928
    Abstract: A process for making an absorbent structure having a capillary substrate and regions of osmotic absorbent on the capillary substrate. The osmotic absorbent is cured from a liquid precursor applied to the capillary substrate. The capillary substrate has regions of topographically different elevations, taken normal to the plane of the capillary substrate. The capillary substrate is passed through a gap between a transfer roll and an anvil roll in a printing apparatus. The transfer roll has at liquid precursor on its periphery. The liquid precursor is applied to only the topographically elevated regions of the capillary substrate which contact the periphery of the transfer roll. By changing the topography of the capillary substrate, the liquid precursor can be applied to the capillary substrate in different pattern, without changing the transfer roll.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: August 27, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan
  • Patent number: 5547747
    Abstract: A process for making an absorbent structure having a capillary substrate and regions of osmotic absorbent on the capillary substrate. The osmotic absorbent is cured from a liquid precursor applied to the capillary substrate. The capillary substrate has regions of topographically different elevations, taken normal to the plane of the capillary substrate. The capillary substrate is passed through a gap between a transfer roll and an anvil roll in a printing apparatus. The transfer roll has a liquid precursor on its periphery. The liquid precursor is applied to only the topographically elevated regions of the capillary substrate which contact the periphery of the transfer roll. By changing the topography of the capillary substrate, the liquid precursor can be applied to the capillary substrate in different pattern, without changing the transfer roll.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 20, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan
  • Patent number: 5543067
    Abstract: Substantially waterless self-emulsifiable biodegradable chemical softening compositions are provided comprising a mixture of an ester-functional quaternary ammonium compound and a polyhydroxy compound. Preferred biodegradable ester-functional quaternary ammonium compounds include diesterdialkyl dimethyl ammonium salts such as diester ditallow dimethyl ammonium chloride, diester di(touch hydrogenated)tallow dimethyl ammonium chloride and diester di(hydrogenated)tallow dimethyl ammonium chloride. Preferred polyhydroxy compounds are selected from the group consisting of glycerol, polyglycerols having a weight average molecular weight from about 150 to about 800 and polyoxyethylene glycols and polyoxypropylene glycols having a weight average molecular weight from about 200 to about 4000.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: August 6, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan, Robert G. Laughlin, Toan Trinh
  • Patent number: 5538595
    Abstract: Tissue paper products comprising a two component chemical softener composition and binder materials, either permanent or temporary wet strength binders, and/or dry strength binders are disclosed. The two component chemical softening composition comprises an ester-functional ammonium compound and a polysiloxane compound. Preferred ester-functional ammonium compounds include diester dialkyl dimethyl ammonium salts such as diester di(touch hardened)tallow dimethyl ammonium chloride and/or di(hydrogenated)tallow dimethyl ammonium chloride. Preferred polysiloxanes include amino-functional polydimethyl polysiloxanes wherein less than about 10 mole percent of the side chains on the polymer contain an amino-functional group.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: July 23, 1996
    Assignee: The Proctor & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan, Ward W. Ostendorf, Joel K. Monteith, Bart S. Hersko, Robert S. Ampulski
  • Patent number: 5527428
    Abstract: A cellulosic fibrous structure having two regions distinguished from one another by basis weight. The first region is an essentially continuous high basis weight network. The second region comprises a plurality of discrete low basis weight regions. The cellulosic fibers forming the plurality of second regions are generally radially oriented within each region. The cellulosic fibrous structure may be formed by a forming belt having zones of different flow resistances arranged in a particular ratio of flow resistances. The zones of different flow resistances provide for selectively draining a liquid carrier through the different zones of the belt in a radial flow pattern.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: June 18, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan, Larry L. Huston
  • Patent number: 5527560
    Abstract: Tissue papers, in particular pattern densified tissue papers, having an enhanced tactile sense of softness when treated with certain nonionic softeners are disclosed. These nonionic softeners are biodegradable and comprise sorbitan esters, ethoxylated/propoxylated versions of these sorbitan esters, or mixtures thereof. The softener is typically applied from an aqueous dispersion or solution thereof to at least one surface of the dry tissue paper web.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: June 18, 1996
    Inventors: Saeed Fereshtehkhou, Larry N. Mackey, Dean V. Phan
  • Patent number: 5510000
    Abstract: Fibrous cellulose materials useful in the manufacture of soft, absorbent paper products such as paper towels, facial tissues, and toilet tissue are disclosed. The paper products contain a vegetable oil based quaternary ammonium chemical softening compound. Examples of preferred vegetable oil based quaternary ammonium chemical softening compounds include dioleyldimethyl ammonium chloride (i.e., di(octadec-z-9-enyl)dimethylammonium chloride) (DODMAC) and dierucyldimethyl ammonium chloride (i.e., di(docos-z-13-enyl)dimethylammonium chloride) (DEDMAC). Depending upon the paper product characteristic requirements, the saturation level of the fatty acyl groups of the vegetable oils can be tailored. Variables that need to be adjusted to maximize the benefits of using unsaturated vegetable oil based acyl groups include the Iodine Value (IV) of the fatty acyl groups; and the cis/trans isomer weight ratios in the fatty acyl groups.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: April 23, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan
  • Patent number: 5503715
    Abstract: Disclosed herein is a cellulosic fibrous structure having multiple regions distinguished from one another by basis weight. The structure is a paper having an essentially continuous high basis weight network, and discrete regions of low basis weight which circumscribe discrete regions of intermediate basis weight. The cellulosic fibers forming the low basis weight regions may be radially oriented relative to the centers of the regions. The paper may be formed by using a forming belt having zones with different flow resistances. The basis weight of a region of the paper is generally inversely proportional to the flow resistance of the zone of the forming belt, upon which such region was formed. The zones of different flow resistances provide for selectively draining a liquid carrier having suspended cellulosic fibers through the different zones of the forming belt.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: April 2, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan, Larry L. Huston
  • Patent number: 5494731
    Abstract: Tissue papers, in particular pattern densified tissue papers, having an enhanced tactile sense of softness when treated with certain nonionic softeners are disclosed. These nonionic softeners are biodegradable and comprise sorbitan esters, ethoxylated/propoxylated versions of these sorbitan esters, or mixtures thereof. The softener is typically applied from an aqueous dispersion or solution thereof to at least one surface of the dry tissue paper web.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: February 27, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Saeed Fereshtehkhou, Larry N. Mackey, Dean V. Phan
  • Patent number: 5487813
    Abstract: Soft creped tissue paper products comprising papermaking fibers and a biodegradable crepe facilitating composition is disclosed. The crepe facilitating composition is a biodegradable bonding inhibitor, a cationic starch and a carboxymethyl cellulose. Preferably, the biodegradable bonding inhibitor is a biodegradable quaternary ammonium compound. The use of a biodegradable bonding inhibitor, a cationic starch and a carboxymethyl cellulose results in a creped tissue paper that is both strong and soft. A creped paper process comprising the addition of the crepe facilitating composition is also disclosed. The composition offers the potential to improve production capacity.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: January 30, 1996
    Assignee: The Procter & Gamble Company
    Inventors: Kenneth D. Vinson, Paul T. Weisman, Dean V. Phan
  • Patent number: 5451452
    Abstract: An improved superabsorbent polymer foam having a morphology to provide improved absorptive properties is disclosed. The foam preferably comprises a superabsorbent polymer formed from a substantially water-soluble, unsaturated monomer having neutralized carboxyl groups and a substantially water-soluble internal crosslinking agent. The monomer and crosslinking agent are expanded in the presence of a substantially water-insoluble blowing agent and a suitable solvent and reacted to form a superabsorbent polymer foam having substantially continuous, intercommunicating channels substantially throughout the foam and a relatively high surface area to mass ratio.Methods for making the foam and absorbent products, members and articles containing the foam are also disclosed.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: September 19, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan
  • Patent number: 5443691
    Abstract: A process for making a cellulosic fibrous structure such as paper. In one embodiment, the fibrous structure has high and low basis weight regions. The high basis weight region is subdivided into low density regions, so that a fibrous structure having three regions is produced. In a second embodiment, the fibrous structure has four regions. Both the high and low basis weight regions are further subdivided into high and low density regions. The process comprises applying noncoincident differential pressure to selected regions of an embryonic fibrous structure.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: August 22, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan
  • Patent number: 5429628
    Abstract: The present invention relates to compositions and articles such as catamenials, diapers, pantiliners, paper towels, tissues, underarm shields, etc., which minimize odor caused from body fluids through the incorporation of an effective amount of cyclodextrin, having a particle size of less than 12 microns. Combinations of small particle size cyclodextrins with other odor-controlling materials are also disclosed.
    Type: Grant
    Filed: March 31, 1993
    Date of Patent: July 4, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Toan Trinh, Dean V. Phan
  • Patent number: 5427696
    Abstract: Biodegradable chemical softening compositions are provided comprising a mixture of a quaternized ester-amine compound and a polyhydroxy compound. Preferred biodegradable quaternized ester-amine compounds include diester dialkyl dimethyl ammonium salts such as diester ditallow dimethyl ammonium chloride, diester di(touch hydrogenated)tallow dimethyl ammonium chloride and diester di(hydrogenated)tallow dimethyl ammonium chloride. Preferred polyhydroxy compounds are selected from the group consisting of glycerol, and polyethylene glycols and polypropylene glycols having a weight average molecular weight from about 200 to 4000.
    Type: Grant
    Filed: January 14, 1993
    Date of Patent: June 27, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan, Toan Trinh
  • Patent number: 5415737
    Abstract: Fibrous cellulose materials useful in the manufacture of soft, absorbent paper products such as paper towels, facial tissues, and toilet tissue are disclosed. The paper products contain a biodegradable vegetable oil based ester-functional quaternary ammonium chemical softening compound. Examples of preferred vegetable oil based ester-functional quaternary ammonium chemical softening compounds include diester dioleyldimethyl ammonium chloride (DEDODMAC) (i.e., di(octadec-z-9-oenoyloxyethyl)dimethylammonium chloride) and diester dierucyldimethyl ammonium chloride (DEDEDMAC) (i.e., di(docos-z-13-enoyloxyethyl)dimethylammonium chloride). Depending upon the paper product characteristic requirements, the saturation level of the fatty acyl groups of the vegetable oils can be tailored. Variables that need to be adjusted to maximize the benefits of using unsaturated vegetable oil based acyl groups include the Iodine Value (IV) of the fatty acyl groups; and the cis/trans isomer weight ratios in the fatty acyl groups.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: May 16, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan