Luis A Lema

US Patent:

39353451, Jan 27, 1976

Filed:

Aug 20, 1974

Appl. No.:

5/499077

Inventors:

Luis E. Lema - Milford MA

Assignee:

Unitrode Corporation - Watertown MA

International Classification:

C23C 302

US Classification:

427383

Abstract:

A method of electroless plating together with electroless plating solutions for plating the substrate of a transition metal capable of forming metal peroxides such as molybdenum or tungsten with a layer of metal plate such as chromium, cobalt, nickel or rhodium. The plating process features an oxidation and reduction reaction in which unstable surface oxides on the substrate of the transition metal are replaced by the desired metal plate. The method of the invention provides an oxygen impervious plate which protects against oxidation of the metal substrate and eliminates oxide migration as well as providing an improved metal-to-metal plate bond.

US Patent:

52020266, Apr 13, 1993

Filed:

Apr 3, 1992

Appl. No.:

7/862689

Inventors:

Luis E. Lema - North Attleboro MA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B01D 5324

US Classification:

2105121

Abstract:

A gas/liquid separator system has an outer enclosing tank filled with a dsting packing material. The tank has a gas outlet port and a liquid outlet port located at its top and bottom, respectively. At least one cylindrical, centrifugal force gas/liquid separator is vertically aligned and centrally located within the tank and is surrounded by the packing material. The cylindrical separator receives a gas/liquid mixture, separates the mixture into respective substantially gas and substantially liquid components, and allows the substantially gas components to exit its gas escape port and the substantially liquid components to exit its liquid escape port. The packing material in the tank further separates the substantially gas and liquid components as they rise and fall, respectively, through the packing material. An inflow line introduces the mixture into the cylindrical separator. The inflow line is upwardly inclined in a direction of flow of the mixture at a point where the inflow line communicates with the cylindrical separator.

US Patent:

52038912, Apr 20, 1993

Filed:

Apr 3, 1992

Appl. No.:

7/862709

Inventors:

Luis E. Lema - North Attleboro MA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B01D 4516
B04C 513

US Classification:

55205

Abstract:

A gas/liquid separator which includes a hollow cylindrical separator body ving: 1) an inlet port for receiving a tangential inflow of a gas/liquid mixture, and 2) an outlet port for allowing liquid separated from the mixture to tangentially exit the cylindrical separator body. The inlet port and outlet port are located such that they face 90. degree. apart from one another. A hollow cylindrical vortex finder is positioned concentrically within the cylindrical separator body which allows the primary and secondary gas flows to exit as stipulated.

US Patent:

57334854, Mar 31, 1998

Filed:

Aug 26, 1996

Appl. No.:

8/703234

Inventors:

Luis E. Lema - North Attleboro MA
Thomas A. Galib - Portsmouth RI

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

B32B 3500

US Classification:

264 36

Abstract:

The present invention relates to a method for eliminating surface irregulties on the wraparound window of a torpedo nose array. The method broadly comprises the steps of preheating an oven to a temperature in the range of from about room temperature to about 160. degree. F. , placing the nose array with the surface irregularities in the preheated oven, applying a vacuum at a pressure of up to about 10 mm of mercury, and maintaining the object in the oven under the conditions of temperature and pressure for a time sufficient to cause polymerization at the surface of the object and removal of gas bubbles, waves and blisters from the surface of the nose array. The method further comprises introducing an anhydrous gas such as nitrogen into the oven during the vacuum applying step.

US Patent:

56289740, May 13, 1997

Filed:

Jul 7, 1995

Appl. No.:

8/499244

Inventors:

Luis E. Lema - North Attleboro MA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

C01D 1500

US Classification:

4231795

Abstract:

A process is provided for treating the solid reaction by-products of lith and sulfur hexafluoride. Lithium in the by-product solid waste is converted to lithium hydroxide. Lithium sulfide in the by-product is converted to lithium hydroxide. Lithium sulfide in the by-product is reacted with an acid to form a water soluble salt and hydrogen sulfide. The hydrogen sulfide is converted to an alkali metal sulfate. Solid aluminum oxide and lithium fluoride are recovered as a feed in the production of aluminum. Remaining lithium salts in solution are converted to lithium carbonate.