Jacob Jerry Block

US Patent:

41441850, Mar 13, 1979

Filed:

Feb 24, 1978

Appl. No.:

5/880831

Inventors:

Jacob Block - Rockville MD

Assignee:

The United States of America as represented by the Secretary of the
Interior - Washington DC

International Classification:

C02B 506
C02B 502

US Classification:

252180

Abstract:

A method and composition for removing calcium sulfate scale deposits from surfaces, such as reverse osmosis membranes and electrodialysis stacks, wherein the surface to be cleaned is contacted by an aqueous solution comprising a chelating agent, a soluble carbonate and a fluorocarbon surfactant.

US Patent:

44473419, May 8, 1984

Filed:

Aug 27, 1982

Appl. No.:

6/412152

Inventors:

Jacob Block - Rockville MD

Assignee:

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

International Classification:

C09K 700
C09K 300
E21B 300

US Classification:

252 85A

Abstract:

The combination of AlO(OH) and crosslinked polyvinyl alcohol can be added to aqueous drilling fluids and especially clay-based aqueous drilling fluids to prevent formation clays and shales from swelling and dispersing when contacted with aqueous drilling fluids. A potassium salt can be added to improve the result. The potassium salt can also be added by making AlO(OH) from potassium aluminate.

US Patent:

55916910, Jan 7, 1997

Filed:

Jul 15, 1994

Appl. No.:

8/276126

Inventors:

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

Assignee:

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

International Classification:

B01J 2104
B01J 2310

US Classification:

502439

Abstract:

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.

US Patent:

44746679, Oct 2, 1984

Filed:

Dec 6, 1982

Appl. No.:

6/446998

Inventors:

Jacob Block - Rockville MD

Assignee:

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

International Classification:

C09K 702

US Classification:

252 85A

Abstract:

A composition capable of imparting fluid loss control properties to aqueous systems. The composition is an admixture of: (a) a solid particulate material having a particle size distribution wherein at least about 90% of said material is capable of passing through a No. 20 U. S. Standard (Fine Series) Sieve; and (b) a cross-linked hydroxyalkyl cellulose; wherein the amount of component (a) to component (b) is in the weight ratio of at least about 0. 5. The invention is further directed to improved drilling fluids containing said composition and to the process of drilling bore holes using said improved fluid.

US Patent:

44118007, Oct 25, 1983

Filed:

Apr 24, 1981

Appl. No.:

6/257091

Inventors:

Peter C. Green - Ellicott City MD
Jacob Block - Rockville MD

Assignee:

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

International Classification:

C09K 702

US Classification:

252 85A

Abstract:

The present invention is directed to a high temperature stable composition capable of imparting a combination of pseudoplasticity and fluid loss control properties to aqueous systems. The composition is a combination of: (a) a solid, particulate silicate or alumino-silicate material; (b) a chemical compound capable of converting to a higher oxidation state under alkaline conditions; and (c) a reaction product of a polymeric substance selected from polyvinyl alcohol or hydroxyalkyl cellulose reacted with at least 1 percent of stoichiometry of a cross-linking agent selected from an epihalohydrin or an aldehyde containing or generating agent; wherein the amount of component (a) is at least 75 wt. percent of component (c) and component (b) is at least 25 wt. percent of component (c).

US Patent:

51767325, Jan 5, 1993

Filed:

Sep 10, 1991

Appl. No.:

7/758915

Inventors:

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

Assignee:

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

International Classification:

C03B 1910

US Classification:

65 214

Abstract:

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).

US Patent:

42448352, Jan 13, 1981

Filed:

Dec 14, 1978

Appl. No.:

5/969547

Inventors:

Jacob Block - Rockville MD

Assignee:

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

International Classification:

B01J 1300

US Classification:

252313R

Abstract:

A method of forming an aqueous dispersion of alpha alumina monohydrate by subjecting a mixture of water and alpha alumina monohydrate to high shear rates. The process is further enhanced by having the mixture contain a small amount of a base selected from a water soluble alkali metal hydroxide, carbonate or oxide. The invention is also directed to a water dispersable alpha alumina monohydrate composition comprising solid particulate alpha alumina monohydrate having from 1 to 5% by weight of an alkali metal oxide, hydroxide or carbonate or ammonium hydroxide substantially uniformly mixed therewith.

US Patent:

57530327, May 19, 1998

Filed:

Sep 27, 1996

Appl. No.:

8/721856

Inventors:

Jacob Block - Rockville MD

Assignee:

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

International Classification:

B09B 300

US Classification:

106699

Abstract:

A composition for transforming a chrysotile asbestos-containing material into a non-asbestos material is disclosed, wherein the composition comprises water, at least about 30% by weight of phosphoric acid, and from about 0. 1 to about 4% by weight of a source of fluoride ions. A method of transforming the asbestos-containing material into a non-asbestos material using the present composition also is disclosed.