Michele Scott Shepard

US Patent:

58807586, Mar 9, 1999

Filed:

Mar 27, 1997

Appl. No.:

8/826304

Inventors:

John L. Stoffel - San Diego CA
Keshava A. Prasad - San Marcos CA
Ronald A. Askeland - San Diego CA
Michele E. Shepard - Escondido CA
Frank Drogo - San Marcos CA
Leonard Slevin - San Diego CA
Mark S. Hickman - Vancouver WA
Clayton L. Holstun - Escondido CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 221
G01D 1100

US Classification:

347 43

Abstract:

A color ink-jet printer is provided, with one pen for dispensing black ink onto a print medium and at least one pen for dispensing color ink onto a print medium. The pen for dispensing black ink is adapted to jet droplets of black ink of a first volume and the pen(s) for dispensing color ink are adapted to jet droplets of color ink of a second volume, with the first volume being larger than the second volume. Such a color ink-jet printer provides both superior text quality of the black ink and does not require as much ink volume of the color ink(s) as previous ink-jet printers.

US Patent:

57451400, Apr 28, 1998

Filed:

Apr 2, 1996

Appl. No.:

8/626432

Inventors:

John L. Stoffel - San Diego CA
Keshava A. Prasad - San Marcos CA
Ronald A. Askeland - San Diego CA
Michele E. Shepard - Escondido CA
Frank Drogo - San Marcos CA
Leonard Slevin - San Diego CA
Mark S. Hickman - Vancouver WA
Clayton L. Holstun - Escondido CA

Assignee:

Hewlett-Packard Company - Palo Alto CA

International Classification:

B41J 201

US Classification:

347100

Abstract:

A color ink-jet printer is provided, with one pen for dispensing black ink onto a print medium and at least one pen for dispensing color ink onto a print medium. The pen for dispensing black ink contains a pigment-based ink and the pen(s) for dispensing color ink contain a water-miscible dye-based ink. Such a color ink-jet printer provides both superior text quality (black ink) and relative ease of service (color inks), since the black ink is used more than the color inks and thus tends to require less spitting due to its frequency of use. On the other hand, since the color inks are used less, the utilization of water-miscible inks, which require less spitting than pigmented inks to keep the nozzle clear, also require less spitting even with relatively lower frequency of use.

US Patent:

54161452, May 16, 1995

Filed:

Aug 5, 1993

Appl. No.:

8/100354

Inventors:

Ronald A. Askeland - San Diego CA
Howard Matrick - Highlands NJ
Michele E. Shepard - Escondido CA

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C09D 1102
C08L 5500

US Classification:

524190

Abstract:

Ink jet ink compositions consisting essentially of an aqueous carrier medium; an anionic dye; and an anionic polymer have excellent decap and puddling behavior and may be used with a variety of ink jet printers such as continuous, piezoelectric, drop-on-demand and thermal or bubble jet drop-on-demand, and are particularly adapted for use in thermal ink jet printers.

US Patent:

20180298218, Oct 18, 2018

Filed:

Mar 22, 2018

Appl. No.:

15/933284

Inventors:

- Dublin 2, IE
Iain Blake - North Ryde, AU
Michele Shepard - San Diego CA, US

International Classification:

C09D 11/328
C09D 11/037
C09D 11/033
C09B 31/06
C09B 31/02
B41J 2/05
B41M 5/00

Abstract:

An inkjet ink includes: (i) a disazo dye of formula (I):(ii) 1,3-propanediol; (iii) a glycol compound selected from the group consisting of: triethylene glycol and tetraethylene glycol; and (iv) water. The ink has low toxicity and is preferably absent ethylene glycol and sulfolane.

US Patent:

20160272830, Sep 22, 2016

Filed:

May 27, 2016

Appl. No.:

15/167850

Inventors:

- Dublin, IE
Michele Shepard - San Diego CA, US
Doreen Bali - North Ryde, AU

International Classification:

C09D 11/328
B41J 2/14
B41J 2/175
B41J 2/155

Abstract:

An inkjet ink includes: (i) a disazo dye of formula (I):(ii) a glycol compound selected from the group consisting of: triethylene glycol, tetraethylene glycol and pentaethylene glycol; and (iv) water.

US Patent:

20160137861, May 19, 2016

Filed:

Oct 7, 2015

Appl. No.:

14/877478

Inventors:

- Dublin, IE
Simon Fielder - North Ryde, AU
Michele Gimona - North Ryde, AU
Christopher Barton - North Ryde, AU
Jognandan Prashar - North Ryde, AU
Michele Shepard - San Diego CA, US
Iain Blake - North Ryde, AU
Richard Myors - North Ryde, AU
Luke Grassy - North Ryde, AU

International Classification:

C09D 11/38
C08K 5/06

Abstract:

An inkjet ink for improving printhead lifetimes includes: an aqueous-based ink vehicle; a colorant; an anti-kogation additive; and an anti-corrosion additive having at least one acetylenic group, the acetylenic group being absent any tertiary or quaternary α-carbon atoms.

US Patent:

20150274996, Oct 1, 2015

Filed:

Mar 6, 2015

Appl. No.:

14/640244

Inventors:

- Dublin, IE
Michele Shepard - San Diego CA, US
Doreen Bali - North Ryde, AU

International Classification:

C09D 11/033
C09D 11/328

Abstract:

An inkjet ink includes: (i) a disazo dye of formula (I):(ii) sulfolane; (iii) a glycol compound selected from the group consisting of: ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol and pentaethylene glycol; and (iv) water.