Albert G Difrancesco

20110056123, Mar 10, 2011

Sep 4, 2007

12/440165

Albert Gary Difrancesco - Rochester NY, US
Richard K. Hailstone - North Chili NY, US
Andreas Langner - Pittsford NY, US
Kenneth J. Reed - Rochester NY, US

CERION TECHNOLOGY, INC. - Rochester NY

C10L 1/188
C01F 17/00
C10L 1/12
C09K 3/14
B82Y 40/00

44410, 423263, 44457, 51309, 977840

A method of making cerium dioxide nanoparticles includes: a) providing an aqueous reaction mixture having a source of cerous ion, a source of hydroxide ion, a nanoparticle stabilizer, and an oxidant at an initial temperature no higher than about 20 C.; b) mechanically shearing the mixture and causing it to pass through a perforated screen, thereby forming a suspension of cerium hydroxide nanoparticles; and c) raising the initial temperature to achieve oxidation of cerous ion to eerie ion and thereby form cerium dioxide nanoparticles having a mean diameter in the range of about 1 nm to about 15 nm. The cerium dioxide nanoparticles may be formed in a continuous process.

20110293683, Dec 1, 2011

May 25, 2011

13/068972

Albert Gary DiFrancesco - Rochester NY, US

A01N 25/34
A01N 25/00
A01P 1/00
A01N 59/16

424411, 424618, 424405

A method for extending the shelf-life of an aqueous dispersion comprising silver halide particles and gelatin, comprises adding adenine to the aqueous dispersion in an amount effective to improve the redispersibility and the colloidal stability thereafter of the aqueous dispersion following extended storage. The extended storage time consisted of 5 days at a temperature of about 40 C. The gelatin amount ranged from about 4 weight % to less than about 1 weight %. The invention also relates to a method of coating fibers, fabrics or substrates with the improved composition to provide antimicrobial properties, and to the coated articles.

20120124899, May 24, 2012

Dec 17, 2008

13/140648

Albert Gary Difrancesco - Rochester NY, US
Thomas D. Allston - Lima NY, US
Richard K. Hailstone - North Chill NY, US
Andreas Langner - Pittsford NY, US
Linda Langner - Pittsford NY, US
Kenneth J. Reed - Rochester NY, US

C10L 1/12
B01J 23/10

44457, 502304

A process for making cerium dioxide nanoparticles containing at least one transition metal (M) utilizes a suspension of cerium hydroxide nanoparticles prepared by mechanical shearing of an aqueous mixture containing an oxidant in an amount effective to enable oxidation of cerous ion to ceric ion, thereby forming a product stream that contains transition metal-containing cerium dioxide nanoparticles, CeMO, wherein “x” has a value from about 0.3 to about 0.8. The nanoparticles thus obtained have a cubic fluorite structure, a mean hydrodynamic diameter in the range of about 1 nm to about 10 nm, and a geometric diameter of less than about 4 nm. The transition metal-containing crystalline cerium dioxide nanoparticles can be used to prepare a dispersion of the particles in a nonpolar medium.

20130337998, Dec 19, 2013

May 24, 2013

13/902156

David Wallace Sandford - Rochester NY, US
Albert Gary DiFrancesco - Rochester NY, US
Richard Kenneth Hailstone - North Chili NY, US

C10L 10/06

502167, 502170

Aqueous and substantially crystalline iron oxide nanoparticle dispersions and processes for making them are disclosed. The nanoparticle size and size distribution width are advantageous for use in a fuel additive for catalytic reduction of soot combustion in diesel particulate filters. Nanoparticles of the aqueous colloid are transferred to a substantially non-polar liquid comprising a carboxylic acid and one or more low-polarity solvents. The transfer is achieved by mixing the aqueous and substantially non-polar materials, forming an emulsion, followed by a phase separation into a substantially metal-free remnant polar phase and a substantially non-polar organic colloid phase. A method for rapid and substantially complete transfer of non-agglomerated nanoparticles to the low polarity phase in the presence of an organic amine, and a rapid phase separation of the substantially non-polar colloid from a remnant aqueous phase, are provided.

20100242342, Sep 30, 2010

May 13, 2010

12/779602

Kenneth Joseph Reed - Rochester NY, US
Albert Gary DiFrancesco - Rochester NY, US
Gary Robert Prok - Rush NY, US
Richard Kenneth Hailstone - North Chili NY, US

CERION TECHNOLOGY, INC. - Rochester NY

C10L 1/12
C01F 17/00
B32B 5/16

44354, 423263, 428402

A process for making cerium-containing oxide nanoparticles includes providing an aqueous reaction mixture containing a source of cerous ion, optionally a source of one or more metal ions (M) other than cerium, a source of hydroxide ion, at least one monoether carboxylic acid nanoparticle stabilizer wherein the molar ratio of said monoether carboxylic acid nanoparticle stabilizers to total metal ions is greater than 0.2, and an oxidant at an initial temperature in the range of about 20 C. to about 95 C. Temperature conditions are provided effective to enable oxidation of cerous ion to ceric ion, thereby forming a product dispersion of cerium-containing oxide nanoparticles, optionally containing one or more metal ions (M), CeMO, wherein “x” has a value from about 0.0 to about 0.95. The nanoparticles may have a mean hydrodynamic diameter from about 1 nm to about 50 nm, and a geometric diameter of less than about 45 nm.