David J Snyder

US Patent:

6471962, Oct 29, 2002

Filed:

Oct 2, 1992

Appl. No.:

07/956473

Inventors:

David Snyder - Bowie MD

Assignee:

The University of Maryland - College Park MD

International Classification:

A61K 3942

US Classification:

4241471, 435 7021, 435339, 5303883

Abstract:

Two monoclonal antibodies which neutralize all infectious bursal disease viruses are employed in the preparation of infectious bursal disease vaccines. A panel of monoclonal antibodies can be used to characterize the infectious bursal disease virus strains present, according to neutralization site characteristics.

US Patent:

6509697, Jan 21, 2003

Filed:

Jan 30, 2001

Appl. No.:

09/771671

Inventors:

Robert Ervin - Gaithersburg MD
Gregory Walter - Frederick MD
David Snyder - Frederick MD

Assignee:

Fusion UV Systems, Inc. - Gaithersburg MD

International Classification:

H05B 4124

US Classification:

315248, 315 3951, 315112, 315344, 347100, 313 35

Abstract:

A compact, electrodeless, microwave-powered lamp (e. g. , ultraviolet light emitting lamp) is provided, as well as methods of using this lamp. The lamp includes a microwave generator, waveguide and RF cavity. The RF slot between the waveguide and RF cavity, for introducing microwaves from the waveguide into the RF cavity, extends through an end member forming the RF cavity rather than through the elliptical-shaped reflector; and the RF slot is aligned with the bulb. Cooling air for cooling the bulb passes through the RF slot, and preferably this cooling air passes by both the bulb and microwave generator for cooling both. The bulb is rotated during use. The compact size of the lamp facilitates its use in small devices, such as inkjet printers for office use to cure ultraviolet light curable inkjet inks, among other uses.

US Patent:

6568095, May 27, 2003

Filed:

Jul 3, 2001

Appl. No.:

09/897126

Inventors:

David H. Snyder - Portage PA 15946

International Classification:

G01C 928

US Classification:

33370, 33382, 33DIG 1

Abstract:

A magnetic torpedo level is adapted for removable magnetic attachment to pipes, EMT (electrical metal tubing), and other ferrometallic cylindrical objects, for measuring their level or slope. The present level includes a series of laterally placed magnets across its base edge, with a pair of ferrometallic rails capturing the magnets therebetween. Ceramic magnets are preferred for their power and longevity, but other magnets may be used as desired. The rails depend beyond the magnets, and define a channel for seating securely upon a cylindrical surface. At least one of the level vials of the present level is may be adjustably repositioned within its vial frame, in one of a series of pairs of vial passages, to adjust the angle of the vial to a specific predetermined angle relative to the level body as desired.

US Patent:

8277671, Oct 2, 2012

Filed:

Sep 18, 2007

Appl. No.:

11/856810

Inventors:

William J. Everson - State College PA, US
David Snyder - State College PA, US
Richard Gamble - State College PA, US
Volker D. Heydemann - State College PA, US

Assignee:

The Penn State Research Foundation - University Park PA

International Classification:

B44C 1/22
C03C 15/00
H01L 21/302
H01L 21/461

US Classification:

216 52, 216 53, 216 88, 216 89, 438691, 438692, 438693

Abstract:

A polishing mixture and related method of polishing a material wafer surface, such as silicon carbide, are disclosed. The polishing mixture comprises; an abrasive and an oxidizer mixed in an acidic solution. Alumina may be used as the abrasive and the polishing mixture may have a pH less than or equal to seven (7).

US Patent:

61563145, Dec 5, 2000

Filed:

Jun 15, 1999

Appl. No.:

9/332978

Inventors:

Vikram Vakharia - Bowie MD
David B. Snyder - Bowie MD

Assignee:

The University of Maryland College Park - College Park MD

International Classification:

A61K 3942
C07H 2104
C07K 1608

US Classification:

4241471

Abstract:

Chimeric cDNA for the expression of immunogenic polypeptides include the genetic epitopic determinants for a base infectious bursal disease virus strain and at least one other infectious bursal disease virus strain. The genetic epitopic determinants encode amino acids or amino acid sequences which define epitopes bound to by previously established monoclonal antibodies. The immunogens expressed by the cDNA may be employed to provide a vaccine against a plurality of IBDV strains. The epitopic determinant of IBDV lethal strains has been detected, and an immunogen for conferring immunity with respect thereto is disclosed. Similarly, a monoclonal antibody specific for IBDV lethal strains is identified, and a vaccine for passive immunization therewith is also disclosed. Immunogens exhibiting conformational epitopes, in the form of virus-like particles, are effective in the preparation of vaccines.

US Patent:

49083058, Mar 13, 1990

Filed:

Oct 21, 1987

Appl. No.:

7/110738

Inventors:

David B. Snyder - Seabrook MD

Assignee:

The University of Maryland - College Park MD

International Classification:

G01N 3353
G01N 33577
C07K 1514
C12N 100

US Classification:

435 5

Abstract:

A method for determining the level of infectious bursal disease virus IBDV neutralizing antibody in poultry comprising a labeled monoclonal antibody R63 having the IBDV neutralizing capability of the monoclonal antibody expressed by hybridoma cell line ATCC HB-9490. Monoclonal antibody R63 is specific to all known IBDV strains and serotypes and competes only with itself and other antibodies recognizing the same neutralizing epitope present in poultry sera. In a competition assay, the increase in unbound labeled monoclonal antibody is an indication of the level of IBDV neutralizing antibody present in poultry sera.

US Patent:

57889708, Aug 4, 1998

Filed:

Mar 29, 1994

Appl. No.:

8/219262

Inventors:

Vikram Vakharia - Bowie MD
David B. Snyder - Bowie MD

Assignee:

The University of Maryland College Park - College Park MD

International Classification:

A61K 39295
C12N 1540
C07K 1408

US Classification:

4241921

Abstract:

Chimeric cDNA for the expression of immunogenic polypeptides include the genetic epitopic determinants for a base infectious bursal disease virus strain and at least one other infectious bursal disease virus strain. The genetic epitopic determinants encode amino acids or amino acid sequences which define epitopes bound to by previously established monoclonal antibodies. The immunogens expressed by the cDNA may be employed to provide a vaccine against a plurality of IBDV strains. The epitopic determinant of IBDV lethal strains has been detected, and an immunogen for conferring immunity is disclosed. Similarly, a monoclonal antibody specific for IBDV lethal strains is identified, and a vaccine for passive immunization is also disclosed. Immunogens exhibiting conformational epitopes, in the form of virus-like particles, are effective in the preparation of vaccines.

US Patent:

49564528, Sep 11, 1990

Filed:

Jun 12, 1987

Appl. No.:

7/061083

Inventors:

David B. Snyder - Lanham MD
Warren W. Marquardt - New Carrollton MD
Sammy L. Gorham - Upper Marlboro MD
Dolores P. Lana - Baltimore MD

Assignee:

The University of Maryland - College Park MD

International Classification:

C07K 1514
C07K 1528
C12N 1500
A61K 39395

US Classification:

530387

Abstract:

Monoclonal antibodies effective in preventing infectious bursal disease in chickens, by neutralizing one or more virus strains thereof, have been isolated and obtained from deposited hybridomas. Vaccination of an entire poultry population with a vaccine prepared from these monoclonal antibodies gives a uniform level of protection against all strains of infectious bursal disease tested. The monoclonal antibodies were effective in inducing priming for an active anti-viral response in a heterologous host.