Neno T Nenov, 81312 Garrison Cir, Port Barrington, IL 60010

6663341, Dec 16, 2003

Feb 19, 2002

10/076411

Alfred Peter Evans - East Amherst NY
Neno Todorov Nenov - Williamsville NY
Gregory William Henzler - East Amherst NY
Jeffert John Nowobilski - Orchard Park NY
Robert Leroy Baker - Williamsville NY

Praxair Technology, Inc. - Danbury CT

F04D 2900

415 26, 4151692, 184 61, 210DIG 5

A process fluid recycle system for compressor assemblies to recycle process fluid vapor flowing from one or more compressors to gear case(s) through shaft seal(s). The flowing process fluid is recycled back to the low pressure inlet of the compressor assembly by way of a recycle conduit. Coalescing filters are provided to separate oil mist from the process fluid vapor. Oil vapor and water vapor can also be removed, where necessary, by suitable oil and water vapor traps. During startup and shutdown or other times when low pressure transients occur that could cause a back flow of gear oil from the gear case into the compressor(s) by way of the shaft seal(s), an anti-back flow compressor is operated to ensure that the pressure within the gear case will be less than within the compressor.

4384725, May 24, 1983

May 24, 1982

6/381845

Neno T. Nenov - Williamsville NY

Union Carbide Corporation - Danbury CT

F16J 1516

277 3

A clearance-type seal for use in rotary fluid handling machinery for preventing lubricant from leaking into working fluid by flowing by capillary action along a fixed surface wherein a coating which is not wetted by the lubricant is placed on the fixed surface of the machinery such that any lubricant which may flow onto the coating is caused to bead up and is thus easily swept away by flow of seal gas.

4900165, Feb 13, 1990

Aug 15, 1988

7/232173

Leslie C. Kun - Grand Island NY
Neno T. Nenov - Williamsville NY

Union Carbide Corporation - Danbury CT

F16C 2702

384220

A bearing support system providing axial thrust load control of bearing supporting a rotating element, by retaining the bearings with a slotted inner ring and supporting the inner ring with a radially spaced outer ring by means of a plurality of circumferentially spaced supports which are radially stiff but axially flexible.

5228298, Jul 20, 1993

Apr 16, 1992

7/868869

Leslie C. Kun - Williamsville NY
Neno T. Nenov - Williamsville NY

Praxair Technology, Inc. - Danbury CT

F25D 2500

62 39

An improved helical dry screw expander particularly suited for cryogenic service and its use in a cryogenic rectification system. The improved helical dry screw expander is particularly advantageous in a cryogenic waste expansion cycle particularly for nitrogen production.

5799505, Sep 1, 1998

Jul 28, 1997

8/901350

Dante Patrick Bonaquist - Grand Island NY
Nancy Rose Cribbin - Buffalo NY
Joseph Alfred Weber - Cheektowaga NY
John Fredric Billingham - Getzville NY
Neno Todorov Nenov - Williamsville NY

Praxair Technology, Inc. - Danbury CT

F25J 300

62613

A system for producing cryogenic liquefied industrial gas, especially useful in conjunction with a non-cryogenic industrial gas production facility, wherein the output of the industrial gas production facility is pressurized, a portion passed to the use point, and another portion is condensed against a turboexpanded stream which is also taken from the pressurized gas.

4682643, Jul 28, 1987

Oct 3, 1985

6/783761

David L. Bernhardt - Canton MI
Neno T. Nenov - Williamsville NY

Nu Con Corporation - Livonia MI

B22C 904

164 34

An investment casting process employs a low-cost plastic pattern manufactured by machining. A mold is cast around the plastic pattern following which the pattern is removed from the mold to leave a mold cavity which molten metal or the like may be poured to produce a finished part. Reusable plastic patterns may be formed by casing silastic rubber. The silastic rubber patterns may be mechanically separated from the mold without damaging the pattern.

5348456, Sep 20, 1994

Apr 26, 1993

8/051923

Leslie C. Kun - Williamsville NY
Neno T. Nenov - Williamsville NY

Praxair Technology, Inc. - Danbury CT

F01C 116
F01C 1900
F01C 2102
F01C 2104

418 95

An improved helical dry screw expander particularly suited for cryogenic service and its use in a cryogenic rectification system. The improved helical dry screw expander is particularly advantageous in a cryogenic waste expansion cycle particularly for nitrogen production.

5924307, Jul 20, 1999

May 19, 1997

8/858632

Neno Todorov Nenov - Williamsville NY

Praxair Technology, Inc. - Danbury CT

F25J 304

62643

A compressor assembly for cryogenic gas separation wherein the assembly comprises a compressor, an expansion turbine and an electric motor integrally connected via a gear drive, and processes for using the compressor assembly.