Michael P Hobczuk

US Patent:

20030164006, Sep 4, 2003

Filed:

Aug 28, 2002

Appl. No.:

10/232193

Inventors:

Karl Buchanan - Kure Beach NC, US
Glen Cook - Corning NY, US
Charles Darcangelo - Corning NY, US
Ronald Davis - Horseheads NY, US
Patrick Gedeon - Painted Post NY, US
Suresh Gulati - Elmira Heights NY, US
Michael Harris - Horseheads NY, US
Michael Hobczuk - Elmira NY, US
Jeffrey King - Corning NY, US
Robert Sabia - Corning NY, US
Gary Squier - Beaver Dams NY, US
Betty Sterlace - Painted Post NY, US
Elizabeth Vileno - Corning NY, US

International Classification:

C03B037/027

US Classification:

065/407000, 065/411000, 065/412000

Abstract:

Methods of bonding glass articles that are subsequently drawn into sheets, rods, fibers, etc. are disclosed. Bonding is achieved without use of adhesives or high temperature fusion. The invention is particularly useful for bonding optical fiber preforms prior to drawing of the optical fiber.

US Patent:

44786417, Oct 23, 1984

Filed:

Mar 21, 1983

Appl. No.:

6/477168

Inventors:

Peter J. Adair - Boston MA
Michael P. Hobczuk - Elmira NY
Paul I. Kingsbury - Elmira NY
John W. Nelson - Painted Post NY

Assignee:

Corning Glass Works - Corning NY

International Classification:

C04B 1100

US Classification:

106110

Abstract:

The instant invention relates to the development of an embedment material suitable for use in heat treating glass castings to convert them into glass-ceramic articles, whereby the shrinkage customarily experienced resulting from densification of the casting during conversion to a glass-ceramic is minimized and sound glass-ceramic articles of tight dimensional tolerances can be produced. The inventive embedment materials will: (a) contain an inorganic component which is subject to an inversion accompanied with a large change in volume at a temperature below the set point of the glass-ceramic article; (b) demonstrate a coefficient of thermal expansion equal to or no more than about 40. times. 10. sup. -7 /. degree. C. units greater than that exhibited by the glass-ceramic article; (c) display a refractoriness sufficient to resist thermal deformation and slumping and be resistant to a phase change at the temperature employed to convert the glass casting to a glass-ceramic article; and (d) be inert to the glass and glass-ceramic. One particularly suitable investment consists essentially, by weight, of 5-30% plaster of Paris and 70-95% leucite.