1
David W Johnson Jr, John B MacChesney, Eliezer M Rabinovich: Fabrication of sintered high-silica glasses. Bell Telephone Laboratories Incorporated, Samuel H Dworetsky, December 6, 1983: US04419115 (62 worldwide citation)

High-silica glasses are formed by sintering a dried gel at temperatures below the liquidus. The gel may be formed by mixing colloidal silica particles or silica-containing liquids with appropriate liquids. Fragmentation of the gel during drying is advantageously avoided by redispersing the dried gel ...


2
Gideon S Grader, David W Johnson Jr, Apurba Roy, John Thomson Jr: Method of making a multilayer monolithic magnet component. AT&T Bell Laboratories, Alfred G Steinmetz, September 27, 1994: US05349743 (55 worldwide citation)

Magnetic components are fabricated as monolithic structures using multilayer co-fired ceramic tape techniques. Fabrication of these magnetic components involves constructing multiple layers of a magnetic material and an insulating non-magnetic mataerial to form a monolithic structure with well defin ...


3
Edwin A Chandross, Debra A Fleming, David W Johnson Jr, John B MacChesney, Frederick W Walz Jr: Manufacture of vitreous silica product via a sol-gel process using a polymer additive. AT&T Bell Laboratories, George S Indig, August 31, 1993: US05240488 (48 worldwide citation)

Lowered cost fabrication including preparation of large bodies of void-free, high-silica glass, depends upon gellation of an aqueous sol of colloidal silica particles, followed by drying and firing of such gel. Freedom from cracks in the dried gel is the consequence of included polymeric material wh ...


4
Gideon S Grader, David W Johnson Jr, Apurba Roy, John Thomson Jr: Method of making a multilayer monolithic magnetic component. AT&T, Alfred G Steinmetz, January 2, 1996: US05479695 (47 worldwide citation)

Magnetic components are fabricated as monolithic structures using multilayer co-fired ceramic tape techniques. Fabrication of these magnetic components involves constructing multiple layers of a magnetic material and an insulating non-magnetic material to form a monolithic structure with well define ...


5
Ernst M Gyorgy, Frances Hellman, David W Johnson Jr: Superconductor-magnet induced separation. American Telephone and Telegraph Company AT&T Bell Labs, George S Indig, January 10, 1989: US04797386 (44 worldwide citation)

Separation between a magnetized member and a Type II superconducting member inherently manifestets stability in separation distance, in lateral direction and in attitude. Uses include levitation of fixed and moveable members as well as superconducting bearings.


6
David W Johnson Jr, Gregory P Kochanski, Louis J Lanzerotti, Cindy M Pribble, David J Thomson: Process for forming integrated structures using three dimensional printing techniques. Agere Systems Guardian, Thomas Kayden Horstemeyer & Risley, April 2, 2002: US06363606 (44 worldwide citation)

An improved process for making a structure using three dimensional printing techniques is disclosed. Briefly stated, the method can be summarized by the following steps: A first type of powder material is deposited in a defined area to form a first layer. Next, a binder material is applied to certai ...


7
Debra A Fleming, David W Johnson Jr, John B MacChesney, Frederick W Walz Jr: Method of producing an optical fiber. American Telephone and Telegraph Company AT&T Bell Laboratories, Eugen E Pacher, October 4, 1988: US04775401 (28 worldwide citation)

The disclosed method of producing optical fiber comprises providing a silica-based glass rod of diameter D that comprises a core region of effective diameter d surrounded by cladding material (D/d typcially>2) and a silica-based porous jacketing tube, inserting the glass core rod into the porous tub ...


8
Leonard G Cohen, David W Johnson Jr, John B MacChesney: Optical fiber with depressed index outer cladding. American Telephone and Telegraph Company AT&T Bell Laboratories, Eugen E Pacher, September 8, 1987: US04691990 (27 worldwide citation)

Single mode and multimode silica-based optical fibers having a down-doped outer cladding are disclosed. The outer cladding material is derived from a preexisting silica tube that comprises an amount of index-lowering dopant, typically F or B, sufficient to result in an effective refractive index of ...


9
David W Johnson Jr, John B MacChesney, Eliezer M Rabinovich, Eva M Vogel: Fabrication of high-silica glass article. American Telephone and Telegraph Company AT&T Bell Laboratories, Eugen E Pacher, November 17, 1987: US04707174 (21 worldwide citation)

Incorporation of fluorine into a porous silica body, such as an unsintered body produced by a sol-gel method, by VAD or OVPO, reduces or eliminates bubble or pore formation upon re-heating of the glass formed by sintering of the porous material. Effective fluorine concentrations are between 0.01 and ...


10
David W Johnson Jr, John B MacChesney, Eleizer M Rabinovich: Sintered high-silica glass and articles comprising same. AT&T Bell Laboratories, Eugen E Pacher, August 12, 1986: US04605428 (21 worldwide citation)

High silica glass is formed by sintering a dried gel. The gel has a pore size distribution such that at most about 5% of the total pore volume is contributed by pores having an effective pore diameter greater than about 0.5 .mu.m, and such that at least 10% of the total pore volume is contributed by ...