Patents by Inventor Paulina P. Garcia

Paulina P. Garcia 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).

  • Squarylium compounds, and processes and intermediates for the synthesis of these compounds
    Patent number: 6482950
    Abstract: Squarylium compounds of the formula: wherein Q1 and Q2 are each independently a pyrylium, thiopyrylium, selenopyrylium, benzpyrylium, benzthiopyrylium or benzselenopyrylium nucleus, and R1 and R2 are each independently an aliphatic or cycloaliphatic group, can be prepared by reacting a squaric acid derivative of the formula: with a compound of the formula Q2CH2R2 in the presence of a base. The derivatives of Formula II may be prepared by condensing a 2,3,4,4-tetrahalocyclobut-2-en-1-one with a compound of the formula Q1CH2R1 in the presence of a base to produce a compound of the formula: wherein Q1 and R1 are as defined above, and X represents chlorine or bromine, and hydrolyzing the compound of Formula III.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 19, 2002
    Assignee: Polaroid Corporation
    Inventors: Paulina P. Garcia, John W. Lee, John L. Marshall, Donald A. McGowan, Anthony J. Puttick, Thomas K. Spencer, Stephen G. Stroud, Stephen J. Telfer, Michael J. Zuraw
  • Squarylium compounds, and processes and intermediates for the synthesis of these compounds
    Patent number: 5919950
    Abstract: Squarylium compounds of the formula: ##STR1## wherein Q.sup.1 and Q.sup.2 are each independently a pyrylium, thiopyrylium, selenopyrylium, benzpyrylium, benzthiopyrylium or benzselenopyrylium nucleus, and R.sup.1 and R.sup.2 are each independently an aliphatic or cycloaliphatic group, can be prepared by reacting a squaric acid derivative of the formula: ##STR2## with a compound of the formula Q.sup.2 CH.sub.2 R.sup.2 in the presence of a base.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: July 6, 1999
    Assignee: Polaroid Corporation
    Inventors: Paulina P. Garcia, John W. Lee, John L. Marshall, Donald A. McGowan, Anthony J. Puttick, Thomas K. Spencer, Stephen G. Stroud, Stephen J. Telfer, Michael J. Zuraw
  • Squarylium compounds, and processes and intermediates for the synthesis of these compounds
    Patent number: 5231190
    Abstract: Squarylium compounds of the formula: ##STR1## wherein Q.sup.1 and Q.sup.2 are each independently a pyrylium, thiopyrylium, selenopyrylium, benzpyrylium, benzthiopyrylium or benzselenopyrylium nucleus, and R.sup.1 and R.sup.2 are each independently an aliphatic or cycloaliphatic group, can be prepared by reacting a squaric acid derivative of the formula: ##STR2## with a compound of the formula Q.sup.2 CH.sub.2 R.sup.2 in the presence of a base. The derivatives of Formula II may be prepared by condensing a 2,3,4,4-tetrahalocyclobut-2-en-1-one with a compound of the formula Q.sup.1 CH.sub.2 R.sup.1 in the presence of a base to produce a compound of the formula: ##STR3## wherein Q.sup.1 and R.sup.1 are as defined above, and X represents chlorine or bromine, and hydrolyzing the compound of Formula III. Alternatively, the derivatives of Formula II may be prepared by reacting a diester, monoacid chloride monoester or diacid chloride of squaric acid with a compound of the formula Q.sup.1 CH.sub.2 R.sup.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: July 27, 1993
    Assignee: Polaroid Corporation
    Inventors: Donald A. McGowan, Paulina P. Garcia, John W. Lee, Thomas K. Spencer, Stephen J. Telfer, Michael J. Zuraw
  • 3,3-Di-(indolin-5-yl)-phthalides and naphthalides
    Patent number: 3931227
    Abstract: This invention relates to a new class of phthalein dyes useful as the color-forming material in either pressure sensitive or heat sensitive mark-forming systems. Such dyes comprise 3,3-disubstituted phthalides and 3,3-disubstituted naphthalides wherein the 3,3 substituents are indolin-5-yl radicals.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: January 6, 1976
    Assignee: Polaroid Corporation
    Inventors: Alan L. Borror, Paulina P. Garcia