William Rostoker

US Patent:

43964320, Aug 2, 1983

Filed:

Jan 11, 1982

Appl. No.:

6/338611

Inventors:

William Rostoker - Chicago IL

Assignee:

University of Illinois Foundation - Chicago IL

International Classification:

C04B 702

US Classification:

106100

Abstract:

Continuous process for converting coal to gaseous fuel with production of Portland cement as a by-product comprises the step of pelletizing a mixture of finely divided coal and limestone, heating (coking) the pellets in a reducing gas atmosphere to liberate volatile fuel products, and converting a substantial proportion of the residual carbon in the pellets to CO and hydrogen by the water-gas reaction, the inorganic constituents of the coal being simultaneously converted to Portland cement clinkers.

US Patent:

42760836, Jun 30, 1981

Filed:

Nov 1, 1979

Appl. No.:

6/090217

Inventors:

William K. Tolley - Arlington Heights IL
William C. Laughlin - Hoffman Estates IL
William Rostoker - Chicago IL

Assignee:

UOP Inc. - Des Plaines IL

International Classification:

C22B 2302
B22F 900

US Classification:

75 82

Abstract:

Metal values may be recovered from metal bearing sources which contain at least two metals, at least one of which is in the form of a sulfide, by treating the aforesaid source with a mild oxidant at an elevated temperature in the range of from about 600. degree. to about 1500. degree. C. whereby at least one metal value is converted to an oxide and at least one metal value is converted to the elemental state which contains a relatively minor amount of sulfur. Thereafter the metal compounds may be separated and recovered by conventional means.

US Patent:

48291528, May 9, 1989

Filed:

Nov 16, 1987

Appl. No.:

7/120927

Inventors:

William Rostoker - Chicago IL
Julius J. Bonini - Chicago IL
Arne R. Jarnholm - Chicago IL

Assignee:

Rostoker, Inc. - Burnham IL

International Classification:

B23K 1100

US Classification:

219 7802

Abstract:

A method for resistance welding a metallic porous body, comprised of a plurality of metallic components arranged in a three dimensional matrix so as to have interconnecting pores or voids formed between said components, to a metallic substrate. The porous body and substrate each define a faying surface. The porous body is impregnated with an electrically conductive material to a predetermined distance from its faying surface, thereby defining an impregnated zone and an unimpregnated zone. The faying surfaces of the substrate and porous body are brought into physical contact so that the unimpregnated zone is disposed between the impregnated zone and faying surface of the porous body. An electrical current is passed through the porous body and the substrate, across the faying surfaces thereby forming a metallurgical bond between the faying surfaces. In the preferred embodiment of the invention: the porous body and substrate are forcibly pressed together, during the step of passing said electrical current; the umimpregnated zone is densified; and a forge weld is formed between the components of the porous body at the faying surface of the porous body and the faying surface of the substate.

US Patent:

47939338, Dec 27, 1988

Filed:

Nov 16, 1987

Appl. No.:

7/120928

Inventors:

William Rostoker - Chicago IL
John Dvorscek - Oak Lawn IL

Assignee:

Rostoker, Inc. - Burnham IL

International Classification:

C02F 170

US Classification:

210710

Abstract:

A waste treatment method for metal hydroxide electroplating sludges. Metal hydroxide sludges from the treatment of electroplating waste waters are rendered environmentally safe. The sludges are first dewatered and heated to a temperature sufficient to cause the metal hydroxides to convert to metal oxides. Predetermined quantities of silica and soda, or sources thereof, are mixed with the metal oxides. The mixture is further heated to a temperature sufficient to cause fusion of the mixture and form a slag-like composition having the metal oxides in chemical solution. The slag-like composition is then cooled to ambient temperature. The structure of the cooled slag-like composition is predominantly crystalline, having the metal oxides in solid solution in either a precipitate phase or a silicate matrix. The slag-like composition is resistant to corrosion even in an acidic environment.

US Patent:

48029955, Feb 7, 1989

Filed:

Jun 5, 1987

Appl. No.:

7/059123

Inventors:

John Dvorscek - Oak Lawn IL
William Rostoker - Chicago IL
Arne R. Jarnholm - Chicago IL

Assignee:

Rostoker, Inc. - Burnham IL

International Classification:

B01D 1700

US Classification:

210761

Abstract:

A method for decomposing the cyanide radical in cyanide-bearing wastes or materials. The cyanide radical of cyanide compounds contained in cyanide-bearing wastes or materials is chemically decomposed. In the preferred embodiment, the cyanide-bearing waste or material and water are introduced into a closed retort. The closed retort is heated and maintained at a temperature above a critical temperature and the cyanide radical is decomposed by reaction with water. At least two new compounds are formed, one of which contains the carbon constituent and the other of which contains the nitrogen constituent of the cyanide radical. The gaseous components which form in the closed retort are vented therefrom and may be condensed. The nongaseous components which form in the closed retort are accumulated therein and removed periodically.

US Patent:

45368945, Aug 27, 1985

Filed:

Aug 4, 1983

Appl. No.:

6/520347

Inventors:

Jorge O. Galante - Oak Brook IL
William Rostoker - Chicago IL

International Classification:

A61F 104

US Classification:

623 22

Abstract:

A femoral hip prosthesis is provided with porous bony ingrowth material on each of the anterior and posterior sides. The bone ingrowth materials on each side flare or expand outwardly in the proximal direction with respect to the sides of the prosthesis, to provide a wedge shaped configuration of at least 1 millimeter increase in thickness at the upper proximal end of the porous materials from the point where the expansion begins. By impacting the prosthesis in the surgically prepared opening in the femoral canal a wedge tight fitting is achieved to assure initial stabilization of the prosthesis for a sufficiently long period of time, e. g. about six weeks or more, until bony ingrowth into the porous materials has occurred to provide long term stabilization. The distal end of the stem of the prosthesis is chamfered anteriorly and posteriorly so that the prosthesis can be used for either the right leg femur or left leg femur without impinging on the anterior bow.

US Patent:

52347214, Aug 10, 1993

Filed:

May 26, 1989

Appl. No.:

7/358549

Inventors:

William Rostoker - Homewood IL
Julius J. Bonini - Munster IN
Gary W. Klimczak - Lemont IL

Assignee:

Rostoker, Inc. - Burnham IL

International Classification:

C23C 200

US Classification:

427431

Abstract:

A method for forming a carbide coating of Group IVA, VA and VIA transition metals and their alloys. The metal to be coated is heated in a bath of molten alkali or alkaline earth metal containing carbon. There is also provided a method for preparing a metal surface for carburization by heating the metal in a nitrogen-containing atmosphere.

US Patent:

51357828, Aug 4, 1992

Filed:

Dec 6, 1990

Appl. No.:

7/622949

Inventors:

William Rostoker - Homewood IL
Gareth Rostoker - Glenwood IL
Julius J. Bonini - Munster IN

Assignee:

Rostoker, Inc. - Burnham IL

International Classification:

C23C 200

US Classification:

427435

Abstract:

Titanium and titanium alloy substrates are provided with a dense coating of a titanium silicide. The titanium silicide coating substantially increases the oxidation resistance of the substrate. The siliciding method includes the steps of: Forming a substantially molten pool of a siliciding alloy; contacting the substrate with the siliciding alloy; maintaining the substrate in contact with the siliciding alloy at a temperature at or above a minimum predetermined temperature to form a titanium silicide coating on the substrate; and separating the coated substrate from the siliciding alloy. The siliciding alloy includes a minimum effective concentration of silicon and a lithium metal flux.