Paul Gia Cheng

Address:

3541 Ellis Ln, Rosemead, CA 91770

VIN:

3TMLU4EN3AM054498

Make:

TOYOTA

Model:

TACOMA

Year:

2010

US Patent:

20130248610, Sep 26, 2013

Filed:

Mar 20, 2012

Appl. No.:

13/506017

Inventors:

Paul Cheng - City of Industry CA, US

International Classification:

B05B 15/00

US Classification:

239 1, 239289

Abstract:

A device discharges fragrance during the dispensing of toilet seat covers generally includes a retainer for holding the toilet seat covers and at least one scent reservoir. The scent reservoir is disposed in the inside of the retainer and in contact with the toilet seat covers. At least one opening is also disposed in the retainer and defines an opening for dispensing the seat covers and discharging fragrance.In the process of usage of the seat cover, a user removes the seat cover from the retainer by pulling the seat cover through the opening. The pulling of the seat cover creates friction on the scent reservoir and enables the fragrance particles to be released. The fragrance air flows out from the opening with the seat cover and disburses scented air into the ambient air.

US Patent:

51323958, Jul 21, 1992

Filed:

Jan 30, 1990

Appl. No.:

7/472198

Inventors:

Tito T. Serafini - Redondo Beach CA
Paul G. Cheng - Rancho Palos Verdes CA
Kenneth K. Ueda - Lomita CA
Ward F. Wright - Redondo Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

C08G 6926
C08G 6308
C08G 7500
C08L 6700

US Classification:

528353

Abstract:

Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or te This invention was made with Government support under F33615-88-C-5409 awarded by the Department of the Air force. The Government has certain rights in this invention.

US Patent:

51497727, Sep 22, 1992

Filed:

Jan 22, 1992

Appl. No.:

7/824090

Inventors:

Tito T. Serafini - Redondo Beach CA
Paul G. Cheng - Rancho Palos Verdes CA
Kenneth K. Ueda - Lomita CA
Ward F. Wright - Redondo Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

C08G 6926
C08G 6308
C08G 7500
C08L 6700

US Classification:

528353

Abstract:

Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or tetraalkylester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, and (c) an end cap compound. The ratio of (a), (b), and (c) is chosen so that upon heating the mixtures, low molecular weight prepolymers are formed, the prepolymers having only one end cap radical and being suitable for chain extension and crosslinking to form high molecular weight, thermally stable polyimides. Upon heating, the prepolymers form polyimide resins, which can have T. sub. g in excess of 600. degree. F. and superior physical properties.

US Patent:

50915053, Feb 25, 1992

Filed:

Jan 30, 1990

Appl. No.:

7/472036

Inventors:

Tito T. Serafini - Redondo Beach CA
Paul G. Cheng - Rancho Palos Verdes CA
Kenneth K. Ueda - Lomita CA
Ward F. Wright - Redondo Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

C08G 6926
C08G 6308
C08G 7500
C08L 6700

US Classification:

528353

Abstract:

Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or tetraalkylester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, and (c) an end cap compound. The ratio of (a), (b), and (c) is chosen so that upon heating the mixtures, low molecular weight prepolymers are formed, the prepolymers having only one end cap radical and being suitable for chain extension and crosslinking to form high molecular weight, thermally stable polyimides. Upon heating, the prepolymers form polyimide resins, which can have T. sub. g in excess of 600. degree. F. and superior physical properties.

US Patent:

51497603, Sep 22, 1992

Filed:

Jan 22, 1992

Appl. No.:

7/824089

Inventors:

Tito T. Serafini - Redondo Beach CA
Paul G. Cheng - Rancho Palos Verdes CA
Kenneth K. Ueda - Lomita CA
Ward F. Wright - Redondo Beach CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

C08G 6926
C08G 6308
C08G 7500
C08G 6700

US Classification:

528353

Abstract:

Polyimides having a high thermal and oxidative stability are prepared by reacting a mixture of monomers comprising (a) a dialkyl, trialkyl, or tetraalkylester of an aromatic tetracarboxylic acid, (b) an aromatic diamine, and (c) an end cap compound. The ratio of (a), (b), and (c) is chosen so that upon heating the mixtures, low molecular weight prepolymers are formed, the prepolymers having only one end cap radical and being suitable for chain extension and crosslinking to form high molecular weight, thermally stable polyimides. Upon heating, the prepolymers form polyimide resins, which can have T. sub. g in excess of 600. degree. F. and superior physical properties.