Christopher D Bull

US Patent:

58305262, Nov 3, 1998

Filed:

Feb 19, 1997

Appl. No.:

8/802710

Inventors:

John E. Wilson - Quakertown PA
Christopher Bull - Bethesda MD

Assignee:

FiberMark, Inc. - Brattleboro VT

International Classification:

B05D 302
B05D 312
B05D 500

US Classification:

427 21

Abstract:

A substrate such as a woven or nonwoven fabric bound with a light-activated dye alone or in combination with additional conventional antimicrobial agents. The substrate is impregnated with a light-activated non-leachable dye having antimicrobial and/or antiviral characteristics which can be imparted to the substrate. The dye is bound by a cationic or anionic binder such as a water soluble polymer or carrageenan. Upon exposure to normal light, the dye generates singlet oxygen that kills microorganisms and viruses.

US Patent:

53169492, May 31, 1994

Filed:

Dec 10, 1992

Appl. No.:

7/988511

Inventors:

Christopher Bull - Bethesda MD
Charles R. Barmore - Moore SC

Assignee:

W. R. Grace & Co.-Conn. - New York NY

International Classification:

G01N 3100

US Classification:

436 5

Abstract:

A method of detecting the permeability of an article to oxygen is disclosed. A fluorescent redox indicator, preferably riboflavin, is dispersed in a carrier and placed on an impermeable substrate. The article to be measured is placed adjacent to the carrier. Residual oxygen is removed, the redox indicator is photoreduced, the article and carrier are exposed to oxygen, and the indicator is exposed to UV light.

US Patent:

55830471, Dec 10, 1996

Filed:

Apr 22, 1994

Appl. No.:

8/231411

Inventors:

Thomas A. Blinka - Columbia MD
Christopher Bull - Bethesda MD
Charles R. Barmore - Moore SC
Drew V. Speer - Columbia MD

Assignee:

W. R. Grace & Co.-Conn. - New York NY

International Classification:

G01N 3100

US Classification:

436 5

Abstract:

A method of detecting the permeability of an article to oxygen is disclosed. A fluorescent redox indicator, preferably riboflavin, is dispersed in a carrier and placed on an impermeable substrate. The article to be measured is placed adjacent to the carrier. Residual oxygen is removed, the redox indicator is photoreduced, the article and carrier are exposed to oxygen, and the indicator is exposed to UV light.

US Patent:

62390481, May 29, 2001

Filed:

Dec 28, 1994

Appl. No.:

8/365464

Inventors:

John E. Wilson - Quakertown PA
Christopher Bull - Bethesda MD

Assignee:

FiberMark, Inc. - Brattleboro VT

International Classification:

B32B 2704

US Classification:

442123

Abstract:

A substrate such as a woven or nonwoven fabric bound with a light-activated dye alone or in combination with additional conventional antimicrobial agents. The substrate is impregnated with a light-activated non-leachable dye having antimicrobial and/or antiviral characteristics which can be imparted to the substrate. The dye is bound by a cationic or anionic binder such as a water soluble polymer or carrageenan. Upon exposure to normal light, the dye generates singlet oxygen that kills microorganisms and viruses.

US Patent:

51027925, Apr 7, 1992

Filed:

Aug 13, 1987

Appl. No.:

7/084782

Inventors:

James F. Walter - Ashton MD
Christopher Bull - Bethesda MD

Assignee:

W. R. Grace & Co.-Conn. - New York NY

International Classification:

C12P 1306

US Classification:

435116

Abstract:

L-Serine derivatives produced by the enzyme catalyzed aldol condensation of glycine and an aldehyde in aqueous solution are recovered in high yield by extracting the aqueous product solution containing said serine derivatives with an organic phase comprising (i) an aldehyde, or (ii) mixtures of an aldehyde and a water immiscible organic solvent, followed by re-extracting the organic phase with an aqueous phase having a pH of less than about 7. The L-erythro isomers of L-serine derivatives such as L-phenylserine may be preferentially prepared by the use of this extraction/re-extraction procedure in combination with bioreactor reaction conditions which include a pH of from about 7. 5 to 10, an aldehyde concentration of from about 1 to about 90 grams/liter, a glycine concentration of from about 10 to about 300 grams/liter, and a molar ratio of glycine to aldehyde of from about 4:1 to about 100:1.

US Patent:

54838193, Jan 16, 1996

Filed:

May 27, 1994

Appl. No.:

8/250085

Inventors:

Charles R. Barmore - Moore SC
Christopher Bull - Bethesda MD

Assignee:

W.R. Grace & Co.-Conn. - New York NY

International Classification:

G01N 2178
G01N 1508

US Classification:

73 38

Abstract:

A device for use in a method of detecting the permeability of an article to oxygen is disclosed. A redox indicator and test object are vacuum sealed between a support and a peelable barrier film.

US Patent:

50981862, Mar 24, 1992

Filed:

Oct 12, 1990

Appl. No.:

7/596711

Inventors:

Christopher Bull - Bethesda MD

International Classification:

G01N 2105

US Classification:

356246

Abstract:

An improvement in rapid mixers for stopped flow spectrophotometers is disclosed. This improvement involves the dispersion of one solution from the bore of a disperser through notches into a flowing sheath of a second solution. The dispersed mixture is then mixed by passage through a mixer made up of a series of mixing rings with lands and grooves. The lands and grooves of adjoining rings are aligned so grooves are adjacent to lands, thus providing maximum mixing. The ratio of volumes of solutions mixed may vary from 1:1 to 40:1 by varying the number and size of notches in the end of the disperser tube. The viscosity ratio of the solutions mixed may vary from 1:1 to 100:1. Complete (greater than 99%) mixing occurs in less than one millisecond.