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Robert Guistina Phones & Addresses

  • 39 Elmford Rd, Rochester, NY 14606 (585) 247-4151
  • 39 Elmford Rd, Rochester, NY 14606

Work

Company: Eastman kodak Position: Retired research chemist

Education

Degree: Bachelors, Bachelor of Science School / High School: Rensselaer Polytechnic Institute Specialities: Chemistry

Skills

Chemistry • Analytical Chemistry • Organic Chemistry • Polymers • Formulation • Laboratory • Analysis • Patents • Research • Inkjet • Uv/Vis • Organic Synthesis • Spectroscopy • Polymer Chemistry • Materials Science • Chromatography • R&D

Industries

Chemicals

Resumes

Resumes

Robert Guistina Photo 1

Robert Guistina

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Location:
Rochester, NY
Industry:
Chemicals
Work:
Eastman Kodak
Retired Research Chemist
Education:
Rensselaer Polytechnic Institute
Bachelors, Bachelor of Science, Chemistry
Skills:
Chemistry
Analytical Chemistry
Organic Chemistry
Polymers
Formulation
Laboratory
Analysis
Patents
Research
Inkjet
Uv/Vis
Organic Synthesis
Spectroscopy
Polymer Chemistry
Materials Science
Chromatography
R&D

Publications

Us Patents

Cleaning Brush For Electrostatographic Imaging Apparatus And Apparatus Containing Same

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US Patent:
6532354, Mar 11, 2003
Filed:
Jul 24, 2001
Appl. No.:
09/912160
Inventors:
James C. Maher - Tampa FL, 33619
Douglas C. Anderson - Rochester NY, 14653-7002
Theodore H. Morse - Rochester NY, 14617
Jiann H. Chen - Rochester NY, 14653-7002
Robert A. Guistina - Rochester NY, 14650-2141
International Classification:
G03G 2100
US Classification:
399353
Abstract:
A photoreceptor cleaning brush for an electrostatographic imaging apparatus contains individual fibers provided with a finishing agent that is a water-miscible aliphatic organic compound containing a plurality of alcoholic hydroxy substituents. The finishing agent is selected from the group of compounds having a molecular weight of up to about 250 and polyethylene glycols having a number-average molecular weight of about 1000 to about 200,000. In an electrostatographic imaging apparatus, the photoconductive imaging element includes the described photoreceptor cleaning brush and a photoconductive surface portion that contains a polycarbonate binder resin. The cleaning brush removes toner from the photoconductive surface portion of the element without damaging it.

Electrophotographic Toner With Stable Triboelectric Properties

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US Patent:
6692880, Feb 17, 2004
Filed:
May 6, 2002
Appl. No.:
10/139782
Inventors:
Robert D. Fields - Rochester NY
Dinesh Tyagi - Fairport NY
John C. Wilson - Rochester NY
Peter Alexandrovich - Rochester NY
Robert Guistina - Rochester NY
Assignee:
Heidelberger Druckmaschinen AG - Heidelberg
International Classification:
G03G 9097
US Classification:
4301081, 4301083, 4301084, 4301085, 43011141, 430122
Abstract:
Toner formulations and developers containing the toner formulations are described. The toner contains at least one toner resin, at least one first charge control agent capable of providing a consistent level of charge, at least one second charge control agent capable of providing a sustained level of charge, at least one surface treatment agent, and at least one release agent and optionally at least one colorant. The toners of the present invention preferably provide a consistent level of charge of from about -10 to about -30 micro C/gm and also provide this level of charge for a sustained period of time, such as from about 2 to about 10 minutes. The toners of the present invention also provides excellent ruboff values for an image printed from the toners of the present invention. Methods of improving ruboff are described as well as methods to develop an image using the toner of the present invention.

Electrostatographic Toner Containing Organometallic Dimethyl Sulfoxide Complex Charge Control Agent

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US Patent:
7501218, Mar 10, 2009
Filed:
Feb 17, 2006
Appl. No.:
11/357233
Inventors:
Robert A. Guistina - Rochester NY, US
Jason Morgan - Fairport NY, US
Dinesh Tyagi - Fairport NY, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
G03G 9/097
US Classification:
4301083, 4301085, 4301093, 4301094
Abstract:
The present invention is an electrostatographic toner that includes an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure;(M)((CH)SO)(A)where n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12, The present invention also includes a developer having a toner, an organometallic complex of dimethyl sulfoxide with a metal salt as a charge control agent having the structure;(M)((CH)SO)(A)where n, q, x and z are integers between 1 and 6, and y is an integer between 2 and 12, and a carrier particle.

Sulfone Charge Control Agents For Electrostatographic Toners

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US Patent:
7541130, Jun 2, 2009
Filed:
Nov 1, 2005
Appl. No.:
11/264735
Inventors:
Robert A. Guistina - Rochester NY, US
Dinesh Tyagi - Fairport NY, US
Jason Morgan - Fairport NY, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
G03G 9/08
US Classification:
4301085, 4301091, 4301095
Abstract:
The present invention is directed to an electrostatographic toner having a sulfone charge control agent having the structure X—SO—Y wherein X is an alkyl or aromatic group and Y is an alkyl or aromatic group. The present invention is also directed to an electorstatographic developer containing the electrostatographic toner having a sulfone charge control agent having the structure X—SO—Y wherein X is an alkyl or aromatic group and Y is an alkyl or aromatic group and carrier particles.

Negative Charge Control Agents And Their Preparation

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US Patent:
8361689, Jan 29, 2013
Filed:
Nov 5, 2007
Appl. No.:
11/934911
Inventors:
Robert A. Guistina - Rochester NY, US
Dinesh Tyagi - Fairport NY, US
Jason Morgan - Fairport NY, US
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
G03G 9/087
US Classification:
4301094, 4301095
Abstract:
The present invention provides an electrostatographic toner that hasa condensation polymer binder having carboxylic acid end groups and an acid number of 4 or greater. The carboxylic end groups are converted to metal salts having the structure;(—COO)Mwhere M is selected from groups IB, IIB, IIIB, IVB, VB, or IA, IIA, IIIA, IVA, VA, VIA, VIIA and VIIIA of the periodic table and n is an integer from 1-4. The present invention also provides a developer of carrier particles and the electrostatographic toner.

Thioethers In Photographic Elements

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US Patent:
57891435, Aug 4, 1998
Filed:
Apr 30, 1997
Appl. No.:
8/846944
Inventors:
George J. Burgmaier - Pittsford NY
David A. Dickinson - Brockport NY
Robert A. Guistina - Rochester NY
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
G03C 1043
G03C 1295
US Classification:
430444
Abstract:
This invention relates to a silver halide color photographic element comprising a support, a silver halide emulsion and poly(thioether)s wherein greater than 50 percent of the poly(thioether)s have acidic functional end groups with an aqueous pKa. ltoreq. 10, or end groups which will react to form acidic functional end groups with an aqueous pKa. ltoreq. 10 during development, on both termini and wherein the poly(thioether)s have a molecular weight greater than 800.

Assemblage For Thermal Dye Transfer

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US Patent:
57444226, Apr 28, 1998
Filed:
Jun 19, 1997
Appl. No.:
8/878704
Inventors:
Steven Evans - Rochester NY
Helmut Weber - Webster NY
Kristine B. Lawrence - Rochester NY
Robert A. Guistina - Rochester NY
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
B41M 5035
B41M 538
US Classification:
503227
Abstract:
A thermal dye transfer assemblage comprising: (I) a dye-donor element comprising a support having thereon sequentially repeating dye layer patches of a dye dispersed in a polymeric binder, at least one of the dye patches containing a pendant basic-substituted dye having the formula: A-(L-B). sub. m wherein: A represents a thermally transferable dye residue, L represents a divalent linking group, B represents a basic substituent, and m represents an integer of from 1 to 3; and (II) a dye-receiving element comprising a support having thereon a polymeric dye image-receiving layer, the dye-receiving element being in a superposed relationship with the dye-donor element so that the dye layer is in contact with the polymeric dye image-receiving layer, the polymeric dye image-receiving layer containing a hydrated transition metal or metalloid salt of a strong acid.

Process For Making An Ink Jet Ink

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US Patent:
62812688, Aug 28, 2001
Filed:
Dec 20, 1999
Appl. No.:
9/467198
Inventors:
Charles E. Romano - Rochester NY
Karen E. Maskasky - Rochester NY
Robert A. Guistina - Rochester NY
Assignee:
Eastman Kodak Company - Rochester NY
International Classification:
C09D 1110
C08L 7102
C07C20902
US Classification:
523160
Abstract:
A process for making an ink jet ink comprising: a) providing a dispersion containing a pigment, an alcohol carrier and an amine-terminated polyether dispersant; b) mixing the pigment dispersion with rigid milling media less than 100. mu. m; c) introducing the mixture of step (b) into a mill; d) milling the mixture from step (c) until the pigment particle size is below about 100 nanometers; e) separating the milling media from the mixture milled in step (d); and f) diluting the mixture from step (e) to obtain an ink jet ink having a pigment concentration suitable for ink jet printers.
Robert A Guistina from Rochester, NY, age ~74 Get Report