Patents by Inventor Rachel M. Loftin

Rachel M. Loftin 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).

  • Overhead projector inks
    Patent number: 6465564
    Abstract: A dry-wipeable overhead projector film ink is provided which includes a colorant, an acrylic polymer having a film forming temperature below room temperature, and water. Preferred inks further include a surfactant and an anti-drying agent. The inks are easily removable from most types of overhead projector film by wiping with a dry cloth or fingertip. Certain preferred inks are also removable by wiping with a wet cloth.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: October 15, 2002
    Assignee: Berol Corporation
    Inventor: Rachel M. Loftin
  • Aqueous inks
    Patent number: 5969004
    Abstract: A method of making an emulsion ink is provided. The method includes mixing an ink precursor and processing the ink precursor in a homogenizer to form an emulsion ink. The ink precursor includes a pigment, water, a film forming polymer, an oil and, preferably, a pH dependent thickener and a base.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: October 19, 1999
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Aqueous ink pen
    Patent number: 5951188
    Abstract: A pen containing an emulsion ink is provided. The emulsion ink is formed by mixing an ink precursor and processing the ink precursor in a homogenizer to form an emulsion ink. The ink precursor includes a pigment, water, a film forming polymer, an oil and, preferably, a pH dependent thickener and a base.
    Type: Grant
    Filed: September 18, 1996
    Date of Patent: September 14, 1999
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Erasable inks
    Patent number: 5919858
    Abstract: An aqueous-based erasable ink composition suitable for use in highlighters and other writing instruments includes a styrene-butadiene copolymer and a water-insoluble pigment. It preferably also includes a release agent and an anti-oxidant, and has a viscosity of between 10 cps and 30 cps.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: July 6, 1999
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Permanent aqueous marker inks
    Patent number: 5804633
    Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 8, 1998
    Assignee: The Gillette Company
    Inventors: Rachel M. Loftin, Kimberly Borelli Sanborn
  • Permanent aqueous marker inks
    Patent number: 5686519
    Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: November 11, 1997
    Assignee: The Gillette Company
    Inventors: Rachel M. Loftin, Kimberly Borelli Sanborn
  • Erasable inks
    Patent number: 5599853
    Abstract: An aqueous-based erasable ink composition suitable for use in highlighters and other writing instruments includes a styrene-butadiene copolymer and a water-insoluble pigment. It preferably also includes a release agent and an anti-oxidant, and has a viscosity of between 10 cps and 30 cps.
    Type: Grant
    Filed: October 7, 1994
    Date of Patent: February 4, 1997
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Permanent aqueous marker inks
    Patent number: 5512623
    Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: April 30, 1996
    Assignee: The Gillette Company
    Inventors: Rachel M. Loftin, Kimberly B. Sanborn
  • Permanent aqueous marker inks
    Patent number: 5470904
    Abstract: Permanent aqueous marker inks are provided which include surfactant, a pigment, a film-forming polymer, and water. The surfactant may be a combination of a hydrocarbon, preferably an alkylphenol ethyoxylate and a fluorocarbon, or it may be a silicone.
    Type: Grant
    Filed: February 2, 1994
    Date of Patent: November 28, 1995
    Assignee: The Gillette Company
    Inventors: Rachel M. Loftin, Kimberly B. Sanborn
  • Ink eradicator system including film forming polymer
    Patent number: 5378752
    Abstract: An ink eradicator system is provided which includes an eradicator fluid that includes a reducing agent, a film-forming polymer and water.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: January 3, 1995
    Assignee: The Gillette Company
    Inventors: Donald P. White, Rachel M. Loftin
  • Fiber marker including an erasable ink
    Patent number: 5362167
    Abstract: An aqueous-based erasable ink composition suitable for use in highlighters and other writing instruments includes a styrene-butadiene copolymer and a water-insoluble pigment. It preferably also includes a release agent and an anti-oxidant, and has a viscosity of between 10cps and 30cps.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: November 8, 1994
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Erasable ink
    Patent number: 5338793
    Abstract: An erasable ink for marking boards is provided which includes a water dispersible pigment, silica, a latex and/or a spreading agent, and water, said ink having the ability to form continuous unbroken lines on a smooth, substantially non-porous surface, said lines being erasable from said surface, after drying, by a dry eraser.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: August 16, 1994
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Solid marking compositions
    Patent number: 5300538
    Abstract: An erasable highlighting composition is provided including a block copolymer, a wax, and a fluorescent pigment. The composition is in solid form, and, when applied to an underlying marking on a substrate, is capable of forming a highlighting marking which may be erased without lifting the underlying marking.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: April 5, 1994
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Writing instrument including shock resistant ink compositions
    Patent number: 5048992
    Abstract: Novel, improved aqueous-based, shear-thinning, shock-resistant ink compositions and writing instruments including the ink compositions. The ink compositions comprise a substantially uniform dispersion of colorant(s), a water-dispersible polymeric shear-thinning material, and a substantially water-soluble polymeric material in a polar solvent system.
    Type: Grant
    Filed: September 13, 1990
    Date of Patent: September 17, 1991
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Ball-point writing instrument containing an aqueous ink composition
    Patent number: 5013361
    Abstract: Aqueous based shear-thinning ink compositions and ball-point pens including the ink compositions. The ink compositions have a shear thinning index of from about 0.01 to about 0.6 and include colorant material(s) and a water dispersible, polymeric shear-thinning material substantially uniformly dispersed in a highly polar solvent system in which water is the primary solvent for the shear-thinning material.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: May 7, 1991
    Assignee: The Gillette Company
    Inventors: Laura K. Case, deceased, Chandrasen Gajria, Rachel M. Loftin, Henry Peper
  • Solid correction compositions
    Patent number: 4992502
    Abstract: Solid correction compositions useful in the form of a stick for correcting markings. The compositions include an opacifying pigment dispersed in a solid mixture of selected first and second waxes and a compatible film forming polymeric hardening material. The stick is rubbed over the marking to be corrected to deposit an adherent film which obscures the marking and can receive and retain a corrected marking.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: February 12, 1991
    Assignee: The Gillette Company
    Inventors: Rachel M. Loftin, John Thompson
  • Shock resistant ink compositions and writing instruments including the compositions
    Patent number: 4971628
    Abstract: Novel, improved aqueous-based, shear-thinning, shock-resistant ink compositions and writing instruments including the ink compositions. The ink compositions comprise a substantially uniform dispersion of colorant(s), a water-dispersible polymeric shear-thinning material, and a substantially water-soluble polymeric material in a polar solvent system.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: November 20, 1990
    Assignee: The Gillette Company
    Inventor: Rachel M. Loftin
  • Ball-point writing instrument containing an aqueous ink composition
    Patent number: 4671691
    Abstract: Gelled, aqueous inks are used in conjunction with viscoelastic ink follower compositions to avoid the necessity of using a fibrous ink reservoir or a porous or extruded ink feed rod.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: June 9, 1987
    Assignee: The Gillette Company
    Inventors: Laura K. Case, Chandrasen Gajria, Rachel M. Loftin, Henry Peper