Chun Ming Li

7135792, Nov 14, 2006

May 11, 2005

11/127469

Thomas J. Devaney - Watchung NJ, US
Chun Li - Plainview NY, US

Dexter Magnetic Technologies, Inc. - Fremont CA

H02K 41/00

310 12

An embodiment of the invention is a particular arrangement of permanent magnets that generates a higher strength and more uniform magnetic field than existing permanent magnet arrangements for a voice coil motor. The permanent magnet arrangement of an embodiment is based on the Halbach arrangement of permanent magnets. The increased magnetic field strength and uniformity allows for a voice coil motor that is both capable of higher frequency actuations as well as more uniform force over the full stroke of the actuation.

49804499, Dec 25, 1990

Jul 14, 1988

7/219290

Joachim B. Kohn - Highland Park NJ
Chun Li - Piscataway NJ

Rutgers, The State University - Piscataway NJ

C08G 7300
C08G 6540

528211

Novel polyiminocarbonates having molecular weights exceeding 70,000 daltons. Novel solution polymerization and interfacial polymerization processes for the preparation of polyiminocarbonates in which cyanate compounds are reacted with diphenol compounds in the presence of a strong base catalyst.

51400944, Aug 18, 1992

Jul 13, 1990

7/553224

Joachim B. Kohn - Highland Park NJ
Chun Li - Piscataway NJ

Rutgers, The State University - Piscataway NJ

C08G 7300
C08G 6540

528211

Novel polyiminocarbonates having molecular weights exceeding 70,000 daltons. Novel solution polymerization and interfacial polymerization processes for the preparation of polyiminocarbonates in which cyanate compounds are reacted with diphenol compounds in the presence of a strong base catalyst.

52645371, Nov 23, 1993

Mar 5, 1992

7/846603

Joachim B. Kohn - Highland Park NJ
Chun Li - Piscataway NJ

Rutgers, The State University - Piscataway NJ

C08G 7300

528211

Novel polyiminocarbonates having molecular weights exceeding 70,000 daltons. Novel solution polymerization and interfacial polymerization processes for the preparation of polyiminocarbonates in which cyanate compounds are reacted with diphenol compounds in the presence of a strong base catalyst.

52429970, Sep 7, 1993

Nov 19, 1992

7/978787

Joachim B. Kohn - Highland Park NJ
Chun Li - Piscataway NJ

Rutgers, The State University of New Jersey - New Brunswick NJ

C08G 6700

525534

Poly(N-phenyl urethanes) and methods of preparing same by heating poly(N-phenyl iminocarbonates) to a temperature above 250. degree. C. so that the backbone of the polyiminocarbonate rearranges to form the poly(N-phenyl urethane). Poly(N-substituted iminocarbonates and methods of preparing same by suspending a dialkaline diphenol in an aprotic solvent at a basic pH and adding to the suspension an N-substituted iminophosgene. Methods for making heat-stable articles by forming an article from a poly(N-phenyl iminocarbonate) while heating the article to a temperature above about 250. degree. C. so that the poly(N-phenyl iminocarbonate) rearranges to form a poly(N-phenyl urethane).