WILLIAM S KARN
Engineers in Pittsburgh, PA

2012028, Nov 15, 2012

May 9, 2011

13/068313

William Snyder Karn - Bellevue PA, US

B32B 27/00, C08L 33/20, C08K 3/34, C08J 9/06, C08J 9/35

428500, 521 89, 521 86

Subject is rocket foam. This letters patent is for construction of a space craft from acrylonitrile foam polymer. The new art involves making a polymer sheet plasticized with sulfur dioxide gas. The plasticize sheet is drape formed and then heated to drive off the gas leaving a rigid foamed polymer shape. The sheet during plasticize step is given a thin adherent layer of sand mingled in acrylonitrile polymer powder. Thermal heating during rocket reentry orbit generates a skin layer of carbide. The carbide protects against flame temperature air, to prevent combustion of the underlying carbon foam structure. A variation is to make the acrylonitrile polymer as a latex paint and apply such paint to a screen form geometry.

4284492, Aug 18, 1981

Dec 5, 1979

6/100486

William S. Karn - Pittsburgh PA

B01D 1302

204299R

The disclosed apparatus is a combined reverse osmosis electrodialysis assembly having osmotic membranes of anionic-cationic bilaminate ion-exchange composition and having electrodes supplying electrical current which effects water-splitting at the membrane faces to produce acidity in osmotic feed stream to prevent salt precipitation. Periodic current reversal inhibits membrane pore plugging and fouling. Heat sealing of membranes and spiral wound array are useful design variants.

4225413, Sep 30, 1980

May 24, 1979

6/041937

William S. Karn - Pittsburgh PA

B01D 1302

204301

Two ion selective semipermeable membranes, such as are used in electrodialysis cell assemblies, are joined to one another at their edges so as to form a pouch with ion permeable walls. The membranes are provided with end flow ports into the pouch region. The pouch is wound into a spiral so as to resemble a spiral wound reverse osmosis module. A central hub electrode and a peripheral cylindrical electrode are provided. With suitable electrolyte streams the system operates as an electrodialysis cell assembly.

4197206, Apr 8, 1980

Sep 13, 1978

5/941966

William S. Karn - Ben Avon PA

B10D 3100

210321A

An ion selective semipermeable membrane such as is used in electrodialysis cell assemblies is fabricated with an unreacted border region of a polymer film which is heat sealable to itself and to other materials of similar composition. Within the border region are sealed two flow port connections to pass ionic process liquid across the face of the membrane. The border regions of one membrane are heat seal bonded at the edge to the border regions of a subsequent membrane in a sequence to form an electrodialysis cell assembly accordion bellows like in configuration. The flow ports communicate with the compartments so formed. Membranes produced by chlorosulfonation of polyethylene are especially suitable for heat sealing.

4263017, Apr 21, 1981

Jan 30, 1980

6/116938

William S. Karn - Pittsburgh PA

B01D 5322, B01D 3100

55 16

The permeable membrane assemblies disclosed in this application utilize the bi-leaf edge membrane concept and the lay-flat tubing connector concept presented in prior and pending patents for ionic systems. Herein these concepts are shown and claimed for their utility in transfer systems in general including selective transfer of gaseous fluids and liquid fluids whether ionic or not as well as for transfer of heat. As before the concepts offer advantages of simplicity and reliability and offer economical assembly in leak free equipment. Countercurrent flow of the fluids is obtained. Hydrogen separation from mixed gases is one application. The full range of dialysis and fluid to fluid extraction processes are prospective candidates for these design concepts.