John H Lau

55916910, Jan 7, 1997

Jul 15, 1994

8/276126

Semyon D. Friedman - Baltimore MD
Awdhoot V. Kerkar - Columbia MD
Ernest W. Hughes - Erie PA
Rasto Brezny - Catonsville MD
John Wing-Keung Lau - Gaithersburg MD
Jacob Block - Rockville MD

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

B01J 2104
B01J 2310

502439

Flexible metal foil catalyst members suitable for use in catalytic devices for combustion engine emission control are prepared by electrophoretic deposition using an aqueous slurry of catalyst support particles. The deposited support layer is of uniform thickness and stable surface area. The catalyst support may then be impregnated with catalytic species and assembled into a catalytic device. The catalyst members from the invention are especially suitable for use in automotive applications, and more especially in electrically heated catalytic devices.

49620681, Oct 9, 1990

Dec 4, 1989

7/466086

John Wing-Keung Lau - Gaithersburg MD
Anastasia M. Conlon - So. Easton MA

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

C03C 314

501 49

PbO-B. sub. 2 O. sub. 3 -Ag. sub. 2 O glasses having a preferred weight ratio range of 76-88:10-15:2-10 have glass transistion temperatures of less than 300. degree. C. and are especially useful for adhering together ceramic substrates such as for attaching integrated circuits to ceramic substrates. The glasses can be formulated with Ag particulates and organics and applied as pastes to provide conductive adhesives.

51767325, Jan 5, 1993

Sep 10, 1991

7/758915

Jacob Block - Rockville MD
John W. Lau - Gaithersburg MD
Roy W. Rice - Alexandria VA
Anthony J. Colageo - Sharon MA

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

C03B 1910

65 214

Low sodium hollow glass microspheres containing less than about 3 wt. % Na. sub. 2 O are produced from aqueous precursors. The method comprises a) forming an aqueous glass precursor solution or slurry by combining sources of cations contained in the glass, the solution or slurry comprising all of the glass cations in proportions substantially identical to those in the glass, b) forming the solution or slurry into droplets, and c) heating the droplets to form the microspheres. The precursor may also contain surfactants, blowing agents or other known expedients. Nonionic fluorocarbon surfactants are preferred. The droplets may be formed by spraying or any other known technique. The droplets may be spray dried prior to heating step c).

50286501, Jul 2, 1991

Mar 22, 1990

7/501344

Jack H. Enloe - Columbia MD
John W. Lau - Gaithersburg MD
Christian B. Lundsager - Ashton MD

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

C08K 338

524404

Boron nitride green sheets are made of boron nitride powder in an organic binder which leaves no undesirable residue upon pyrolysis in the absence of oxygen. These boron nitride green sheets can be placed on each side of the ceramic green sheet to form a composite for hot pressing ceramic green sheets containing ceramic powder to produce dense ceramic sheets suitable for electronic substrates.

52117863, May 18, 1993

Dec 21, 1990

7/631577

Jack H. Enloe - Columbia MD
John W. Lau - Gaithersburg MD

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

C04B 3700
B28B 126
B29C 6700

156 89

The present invention overcomes the problems caused by certain intergranular phases present during hot pressing. The invention provides a method of removing such problematic intergranular phases while avoiding problems of non-uniformity. In one aspect, the invention encompasses an improvement in a method of sintering a green body by hot pressing, where the green body contains ceramic grains to be sintered and material capable of existing as intergranular phase material during sintering. The improvement embraces hot pressing the body in the presence of a permeable material adapted to receive at least a portion of intergranular phase material as the sintering takes place or after the sintering has been completed.

51683440, Dec 1, 1992

Aug 15, 1990

7/567518

Michael R. Ehlert - Irvine CA
Jack H. Enloe - Columbia MD
Alan L. Kovacs - Long Beach CA
John W. Lau - Gaithersburg MD

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

H01L 2302

257693

Hermetic package designs for HDMI substrates are discussed. The designs for a hermetically sealed, perimeter-leaded package may have the following features: a) a flat monolithic dielectric base, the base having a flat upper surface and a flat lower surface; b) a zone on the upper surface, in which zone the HDMI device would reside; c) a seal ring surrounding the zone; d) a cover adapted to be hermetically sealed to the seal ring, thereby protecting the HDMI device located in the zone; e) a plurality of conductive vias (inner vias) extending from the upper surface inside said zone downwardly toward the lower surface; f) a plurality of perimeter conductive lead pads located on or in the upper surface about the perimeter of the zone inside the seal ring; wherein (1) the perimeter lead pads are electrically connected to the inner vias, and (2) the inner vias are electrically connected to a surface of the base outside the zone.

50735268, Dec 17, 1991

Aug 1, 1990

7/544437

Jack H. Enloe - Columbia MD
John W. Lau - Gaithersburg MD
Roy W. Rice - Alexandria VA

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

C04B 3558

501 96

An electronic package comprising dielectric layers including a densified aluminum nitride (AlN) base layer and at least one densified AlN-borosilicate glass composite layer bonded thereto is described. Any of the dielectric layers may be metallized with conductive circuit patterns and can contain conductive vias. Production of this package is accomplished by hot pressing a greenware laminate comprising a densified base (e. g. , AlN); at least one green sinterable sheet (e. g. , AlN-borosilicate glass composite); and a green sheet of non-sinterable material (e. g. , boron nitride [BN]). The respective green sheets comprise homogeneous mixtures of the ceramic powders and a binder, e. g. , polyethylene. The polyethylene is burnt off during the hot press operation.

50174347, May 21, 1991

Dec 19, 1988

7/286557

Jack H. Enloe - Columbia MD
John W. Lau - Gaithersburg MD
Roy W. Rice - Alexandria VA

C03C 1000
B32B 1500

428428

An electronic package comprising dielectric layers including a densified aluminum nitride (AlN) base layer and at least one densified AlN-borosilicate glass composite layer bonded thereto is described. Any of the dielectric layers may be metallized with conductive circuit patterns and can contain conductive vias. Production of this package is accomplished by hot pressing a greenware laminate comprising a densified base (e. g. , AlN); at least one green sinterable sheet (e. g. , AlN-borosilicate glass composite); and a green sheet of non-sinterable material (e. g. , boron nitride [BN]). The respective green sheets comprise homogeneous mixtures of the ceramic powders and a binder, e. g. , polyethylene. The polyethylene is burnt off during the hot press operation.