Richard D Pollak

US Patent:

6376031, Apr 23, 2002

Filed:

Jan 14, 2000

Appl. No.:

09/462977

Inventors:

Richard Pollak - Del Mar CA 92014

International Classification:

A01N 100

US Classification:

428 15, 428426, 428432, 4285422, 428543, 4271262, 4271263, 427140, 427217

Abstract:

In accordance with the present invention, there are provided methods for enhancing the color of minerals useful as gemstones. Invention methods are relatively inexpensive to carry out, avoid the use of hazardous materials, and require no specialized equipment.

US Patent:

6635309, Oct 21, 2003

Filed:

Mar 12, 2001

Appl. No.:

09/803218

Inventors:

Richard D. Pollak - Encinitas CA 92024

International Classification:

B05D 112

US Classification:

427190, 427192, 4273833, 501 86, 63 32, 428426, 428432

Abstract:

In accordance with the present invention, there are provided methods for enhancing the color of gemstone(s) by subjecting a combination of a gemstone and at least one finely divided form of a selected treating agent including the element copper to a temperature in the range of about 700Â C. up to about 1000Â C. , for a time period in the range of about 3 hours up to about 600 hours, under conditions suitable to enhance the color of the gemstone, wherein the treating agent consists of a finely divided form of the selected treating agent such as copper metal or copper oxide, and wherein said gemstone is topaz or sapphire and the enhanced color lies in the color spectrum of light yellow to red.

US Patent:

20020174682, Nov 28, 2002

Filed:

Apr 23, 2002

Appl. No.:

10/131588

Inventors:

Richard Pollak - Del Mar CA, US

Assignee:

United Radiant Applications

International Classification:

A44C017/02

US Classification:

063/028000

Abstract:

In accordance with the present invention, there are provided methods for enhancing the color of minerals useful as gemstones. Invention methods are relatively inexpensive to carry out, avoid the use of hazardous materials, and require no specialized equipment.

US Patent:

50849093, Jan 28, 1992

Filed:

Mar 23, 1990

Appl. No.:

7/497997

Inventors:

Richard D. Pollak - Encinitas CA

International Classification:

G21K 500

US Classification:

378 64

Abstract:

Color enhanced topaz, beryl, tourmalines, quartz, diamonds and other gem material products, both natural and synthetic, and the process by which they are color-enhanced are described. In this process rough or finished gemstones of virtually any size, in particular very large single pieces weighing approximately one hundred carats up to 10 kilograms, are placed in a very high energy gamma ray field for extended periods of time, on the order of 50 hrs to 1000 hrs, or more, to give total exposures of 400 megagards up to 8000 megagards. The gamma flux used may be in the range of 0. 5 MEV up to 30 MEV or more. In particular, the rays will be substantially higher energy than those available from conventional cobalt 60 or cesium 137 and similar sources.

US Patent:

58889183, Mar 30, 1999

Filed:

Apr 25, 1997

Appl. No.:

8/845709

Inventors:

Richard Pollak - Encinitas CA

International Classification:

C30B 2900
A44C 1700
B05D 112
B05D 302

US Classification:

501 86

Abstract:

In accordance with the present invention, there are provided methods for enhancing the color of minerals useful as gemstones. Invention methods are relatively inexpensive to carry out, avoid the use of hazardous materials, and require no specialized equipment.