Gregory F Payne

US Patent:

7138373, Nov 21, 2006

Filed:

Sep 26, 2003

Appl. No.:

10/529012

Inventors:

Tianhong Chen - Newark DE, US
Heather D. Embree - Baltimore MD, US
Eleanor M. Brown - Oreland PA, US
Maryann M. Taylor - Richboro PA, US
Gregory F. Payne - Hunt Valley MD, US

Assignee:

University of Maryland, Baltimore County - Baltimore MD
University of Maryland Biotechnology Institute - Baltimore MD
The United States of America as represented by the Secretary of the Agriculture - Washington DC

International Classification:

A61K 38/16
C08B 37/08
C07K 2/00

US Classification:

514 12, 530354, 530395, 530411, 536 20

Abstract:

Gels and polymers comprising a polypeptide bound to a polysaccharide are disclosed. Specific polypeptides include, but are not limited to, polypeptides that comprise glutamine or tyrosine residues. Specific polysaccharides include, but are not limited to, chitosan. Gels and polymers of the invention can be used for the in vitro and in situ formation of protein-polysaccharide conjugates. Methods of making polypeptide/polysaccharide gels and polymers are also disclosed.

US Patent:

7288532, Oct 30, 2007

Filed:

Aug 20, 1999

Appl. No.:

09/763324

Inventors:

Gregory F. Payne - Hunt Valley MD, US
Guneet Kumar - Ellicott City MD, US

Assignee:

The University of Maryland Biotechnology Institute - Rockville MD
The University of Maryland, Baltimore County - Baltimore MD

International Classification:

C08G 8/00
C12P 19/04

US Classification:

514 55, 435 681, 435 72, 435 74, 435101, 527200, 527206, 527303, 536 20, 536 551, 536 553, 536127

Abstract:

The present invention is directed to homogeneous phase enzyme-catalyzed processes for producing modified chitosan polymers or oligomers. An enzyme is reacted with a phenolic substrate in the presence of a chitosan polymer or oligomer to produce a modified chitosan polymer or oligomer. The invention also includes modified chitosan polymers or oligomers produced by the novel processes, in particular modified chitosan polymers or oligomers having useful functional properties, such as base solubility and/or high viscosity.

US Patent:

7790010, Sep 7, 2010

Filed:

Jun 17, 2005

Appl. No.:

11/155116

Inventors:

William E. Bentley - Annapolis MD, US
Reza Ghodssi - Rockville MD, US
Gregory F. Payne - Cockeysville MD, US
Gary W. Rubloff - Clarksville MD, US
Li-Qun Wu - North Potomac MD, US
Hyunmin Yi - Ellicott City MD, US
Wolfgang Losert - Bethesda MD, US
Douglas S. English - Silver Spring MD, US

Assignee:

University of Maryland, College Park - College Park MD
University of Maryland, Baltimore County - Baltimore MD

International Classification:

C25D 5/02
C25D 5/48
C25D 9/02

US Classification:

205118, 205136, 205229, 205317

Abstract:

A method is provided for electrochemically depositing a polymer with spatial selectivity. A substrate having a substrate surface is contacted with an aqueous solution containing a selectively insolubilizable polysaccharide, such as chitosan, which is subjected to electrochemically treatment to deposit, with spatial selectivity, the selectively insolubilizable polysaccharide on a patterned electrically conductive portion of the substrate surface.

US Patent:

7820227, Oct 26, 2010

Filed:

Feb 20, 2004

Appl. No.:

10/581905

Inventors:

Gregory F. Payne - Cockeysville MD, US
Gary W. Rubloff - Clarksville MD, US
Hyunmin Yi - Lexington MA, US
Rohan Fernandes - Beltsville MD, US
Li-Qun Wu - North Potomac MD, US
Reza Ghodssi - Silver Spring MD, US
William E. Bentley - Annapolis MD, US

Assignee:

University of Maryland, College Park - College Park MD
University of Maryland, Baltimore County - Baltimore MD

International Classification:

A61L 33/00

US Classification:

427 21, 427 211, 427 212, 427299, 427300, 427307, 427322, 427331, 4273722, 4273743, 427384, 4273882, 4273884

Abstract:

A method for biolithographical deposition of molecules is provided. According to an embodiment of the method, a reactive layer (e. g. , a polysaccharide mass) having a surface region coated with a biologically compatible resist is provided. A portion of the biologically compatible resist is selectively removed to expose an exposed portion of the reactive layer. Molecules, such as biomolecules and/or cellular species, are then conjugated to the exposed portion of the reactive layer. Also provided are materials and devices related to the method.

US Patent:

7883615, Feb 8, 2011

Filed:

Feb 11, 2004

Appl. No.:

10/541057

Inventors:

Gregory F. Payne - Cockeysville MD, US
Li-Qun Wu - North Potomac MD, US
Reza Ghodssi - Rockville MD, US
William E. Bentley - Annapolis MD, US
Gary W. Rubloff - Clarksville MD, US
Hyunmin Yi - Ellicott City MD, US
Rohan Fernandes - Beltsville MD, US
Tianhong Chen - Newark DE, US
David A. Small - Silver Spring MD, US

Assignee:

University of Maryland, College Park - College Park MD
University of Maryland, Baltimore County - Baltimore MD

International Classification:

C25D 9/02

US Classification:

205 82, 205317, 205229, 205118

Abstract:

A method is provided for electrochemically depositing a polysaccharide mass having a selected physical state. According to an embodiment, an electrically conductive support of a substrate is contacted with an aqueous solution including a selectively insolubilizable polysaccharide, and the selectively insolubilizable polysaccharide is electrochemically deposited on the electrically conductive support while controlling deposition conditions to form the polysaccharide mass having the selected physical state, such as that of a hydrogel. Deposition may be performed in a spatially and/or temporally controlled manner.

US Patent:

8562809, Oct 22, 2013

Filed:

Oct 2, 2009

Appl. No.:

13/122403

Inventors:

Yi Liu - Bethesda MD, US
Gregory F. Payne - Hunt Valley MD, US
W. Lee Meyer - Baltimore MD, US

Assignee:

University of Maryland, College Park - College Park MD

International Classification:

C25D 9/02

US Classification:

205229, 205317

Abstract:

A method of forming a bioelectronic device including a protein on an electrically conductive substrate, by electrodepositing aminopolysaccharide chitosan on the substrate while applying a cathodic voltage to the substrate, to form an aminopolysaccharide chitosan film thereon, applying an anodic voltage to the substrate in the presence of NaCl to activate the aminopolysaccharide chitosan film so that it is reactive with protein. The method also optionally includes reacting the aminopolysaccharide film, after activation thereof, with the protein, so that the protein assembles on and is coupled to the substrate, thereby forming a bioelectronic device. The protein can include single or multiple protein species, and including biosensing proteins. Additional methods include biosensing of electrochemically active compounds either present in a sample or generated during a biological recognition event and devices useful in such methods. The resulting devices are useful as sensors in hand-held devices, textiles, garments and the like.

US Patent:

20070172821, Jul 26, 2007

Filed:

Aug 22, 2003

Appl. No.:

10/525241

Inventors:

Li-Qun Wu - N. Potomac MD, US
Mark Kastantin - Goleta CA, US
Hyunmin Yi - Beltsville MD, US
Gary Rubloff - Clarksville MD, US
William Bentley - Clarksville MD, US
Reza Ghodssi - Rockville MD, US
Gregory Payne - Hunt Valley MD, US

International Classification:

C12Q 1/68
H01L 21/00
C12M 3/00

US Classification:

435006000, 204471000, 435287200, 427002110, 438001000, 257E51020

Abstract:

The deposition of chitosan onto electrode surfaces is disclosed. Methods of depositing chitosan on surfaces are disclosed. Materials comprising chitosan deposited on a substrate are also disclosed.

US Patent:

20080254104, Oct 16, 2008

Filed:

Mar 17, 2008

Appl. No.:

12/077173

Inventors:

Srinivasa R. Raghavan - Silver Spring MD, US
Gregory F. Payne - Cockeysville MD, US
Chao Zhu - McLean VA, US
Matthew B. Dowling - Washington DC, US

International Classification:

A61K 9/70
A61P 17/02

US Classification:

424445

Abstract:

The present invention provides a novel biomaterial which is a hybrid, self-assembling biopolymeric networked film that is functionalized through hydrophobic interactions with vesicles loaded with bioactive agents. The biomaterial compound is a polymeric network of hydrophobically modified chitosan scaffolds that is taken from solution and formed as a solid film. This solid state film is capable of hydrophobic interactions with the functionalized vesicles. The vesicles include one or more lamellar structures forming one or more nano-compartments that are capable of containing similar or alternative active moieties within. Use of the film results in a degradation of the chitosan scaffold thereby releasing the active moieties within the vesicles from the scaffold. Application of the current invention occurs through various delivery mechanisms and routes of administration as will be described herein.