Roger A Boggs

US Patent:

7842128, Nov 30, 2010

Filed:

Sep 13, 2007

Appl. No.:

11/898569

Inventors:

Satish Agrawal - Concord MA, US
Roger Boggs - Lowell MA, US

Assignee:

Performance Indicatior LLC - Lowell MA

International Classification:

C09D 11/00

US Classification:

106 3103

Abstract:

Provided are permanent tissue markings comprising at least one colored compound comprising a thermally activatable fragmentation group and at least one infrared absorbing compound, wherein the at least one colored compound is capable of being rendered colorless by unimolecular fragmentation of the thermally activatable fragmentation group when the tissue marking is non-imagewise exposed by a source of infrared radiation.

US Patent:

8039193, Oct 18, 2011

Filed:

Sep 13, 2007

Appl. No.:

11/898570

Inventors:

Satish Agrawal - Concord MA, US
Roger Boggs - Lowell MA, US

Assignee:

Performance Indicator LLC - Lowell MA

International Classification:

G03F 7/00
G03F 7/004
B41M 5/20

US Classification:

4302701, 430 19, 430330, 430944, 430138, 430945, 503227

Abstract:

Provided are methods of applying a tissue marking to a tissue and rendering said tissue marking colorless when desired, comprising implanting into the tissue an amount of the tissue marking in sufficient quantity to form a detectable marking, said tissue marking comprising at least one colored compound comprising a thermally activatable fragmentation group and at least one infrared absorbing compound, wherein the at least one colored compound is capable of being rendered colorless by unimolecular fragmentation of the thermally activatable fragmentation group when the tissue marking is non-imagewise exposed by a source of infrared radiation and applying sufficient infrared radiation to a sufficient amount of the tissue marking to render the tissue marking colorless when desired.

US Patent:

8258080, Sep 4, 2012

Filed:

Sep 15, 2011

Appl. No.:

13/233724

Inventors:

Satish Agrawal - Concord MA, US
Roger Boggs - Lowell MA, US

Assignee:

Performance Indicator, LLC - Lowell MA

International Classification:

G03F 7/00
G03F 7/004
B41M 5/20

US Classification:

503227, 4302701, 430 19

Abstract:

Provided are methods of applying a tissue marking to a tissue and rendering said tissue marking colorless when desired, comprising implanting into the tissue an amount of the tissue marking in sufficient quantity to form a detectable marking, said tissue marking comprising at least one colored compound comprising a thermally activatable fragmentation group and at least one infrared absorbing compound, wherein the at least one colored compound is capable of being rendered colorless by unimolecular fragmentation of the thermally activatable fragmentation group when the tissue marking is non-imagewise exposed by a source of infrared radiation and applying sufficient infrared radiation to a sufficient amount of the tissue marking to render the tissue marking colorless when desired.

US Patent:

54222303, Jun 6, 1995

Filed:

Apr 12, 1994

Appl. No.:

8/226452

Inventors:

Roger A. Boggs - Wayland MA
Warren D. Slafer - Arlington MA
Stephen J. Telfer - Arlington MA
Michael J. Zuraw - Arlington MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 173
G03C 700

US Classification:

430338

Abstract:

A slide blank comprises a support; a mask layer having a substantially transparent central portion and a non-transparent peripheral portion surrounding the central portion; and an imageable layer which is not substantially photosensitive but is imageable to form an image which can be viewed in transmission. The support, mask layer and imageable layer are secured together so that the support and the imageable layer extend across essentially the entire transparent central portion of the mask layer, at least the portion of the support adjacent the central portion of the mask layer being substantially transparent. This slide blank can be imaged to produce a ready-mounted slide.

US Patent:

55343937, Jul 9, 1996

Filed:

Nov 28, 1994

Appl. No.:

8/345073

Inventors:

Roger A. Boggs - Wayland MA
Jurgen M. Grasshoff - Hudson MA
Mark R. Mischke - Arlington MA
Anthony J. Puttick - Arlington MA
Stephen J. Telfer - Arlington MA
David P. Waller - Lexington MA
Kenneth C. Waterman - Arlington MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 516

US Classification:

430348

Abstract:

Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.

US Patent:

49469649, Aug 7, 1990

Filed:

Dec 11, 1987

Appl. No.:

7/131911

Inventors:

Roger A. Boggs - Wayland MA
John B. Mahoney - Tewksbury MA
Avinash C. Mehta - Belmont MA
William C. Schwarzel - Billerica MA
Lloyd D. Taylor - Lexington MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

C07D25704

US Classification:

548251

Abstract:

There is described a photographic system wherein development of an exposed photosensitive element with an aqueous alkaline photographic developing composition is effected in the presence of a compound represented by the formula ##STR1## wherein R is --OH, --OR. sub. 4, --NH. sub. 2 --NHR. sub. 5 or --NR. sub. 4 R. sub. 6 ; R. sub. 1 is hydrogen, --NH. sub. 2, alkyl, substituted alkyl, aryl or substituted aryl; R. sub. 2 and R. sub. 3 each independently is hydrogen, alkyl, aralkyl or aryl; R. sub. 4 is a protecting group which can be removed in the presence of a base; R. sub. 5 is an activating group which can render the neighboring hydrogen atom acidic; R. sub. 6 is an electron withdrawing group which is capable of stabilizing the negative charge on the nitrogen atom which is produced upon removal of R. sub. 4 upon contact with alkali; and PHOTO is a photographically useful group. The compounds provide controlled release of the photographically useful group by a base-catalyzed elimination when contacted by the aqueous alkaline processing composition.

US Patent:

59142138, Jun 22, 1999

Filed:

Oct 6, 1997

Appl. No.:

8/944284

Inventors:

Jurgen M. Grasshoff - Hudson MA
John L. Marshall - Somerville MA
Richard A. Minns - Arlington MA
Socorro M. Ramos - North Andover MA
Stephen G. Stroud - Medford MA
Stephen J. Telfer - Arlington MA
Haixin Yang - Durham NC
Roger A. Boggs - Wayland MA
Eric S. Kolb - Acton MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 1492
G03C 1494
G03C 176

US Classification:

4302701

Abstract:

A process for generation of acid uses a medium comprising a first acid-generating component capable of generating a first acid, and a secondary acid generator, this secondary acid generator being capable of thermal decomposition to form a secondary acid, the thermal decomposition of the secondary acid generator being catalyzed by the first acid. At least part of the medium is exposed to so as to cause formation of the first acid from the first acid-generating component; and the medium is then heated to cause, in the exposed part of the medium, acid-catalyzed thermal decomposition of the secondary acid generator and formation of the secondary acid. The secondary acid generator has a first site bearing a first leaving group and a second site bearing a second leaving group, the first leaving group being capable of protonation by the first acid, with expulsion of the first leaving group to form a cation which electrophilically adds to an unsaturated reagent bearing a proton at the site of addition and a proton-containing nucleophilic grouping at an adjacent site, following which said proton on the reagent is lost and the second leaving group is displaced by said nucleophilic grouping, the second leaving group, in combination with a proton, forming the secondary acid. Preferred variants of the process are of the types described in U. S. Pat. Nos. 5,286,612; 5,334,489; 5,395,736; 5,441,850 and 5,453,345.

US Patent:

54016193, Mar 28, 1995

Filed:

Aug 13, 1993

Appl. No.:

8/106353

Inventors:

Roger A. Boggs - Wayland MA
Jurgen M. Grasshoff - Hudson MA
Mark R. Mischke - Arlington MA
Anthony J. Puttick - Arlington MA
Stephen J. Telfer - Arlington MA
David P. Waller - Lexington MA
Kenneth C. Waterman - Arlington MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03C 1725
G03C 173
G03C 135

US Classification:

430343

Abstract:

Certain squaric acid derivatives are useful for the thermochemical generation of acid. The squaric acid derivatives may be used in imaging media in conjunction with acid-sensitive materials which undergo a color change when contacted by the acid generated from the squaric acid derivatives. Preferably, the acid-sensitive materials undergo an irreversible color change, so that the image can be fixed by neutralizing all the acid generated with excess base, thereby preventing further color change in the image during long term storage.