SH

Siebolt Hettinga

CI Central Quality Industries: 1 patents #2 of 3Top 70%
Overall (All Time): #95,138 of 4,157,543Top 3%
36
Patents All Time

Issued Patents All Time

Showing 25 most recent of 36 patents

Patent #TitleCo-InventorsDate
6217973 Plastic article of varying density 2001-04-17
6149998 Heat laminated fabric hinge and method of making same 2000-11-21
6146562 Method of injection molding an article with a cellular density distribution which gradually varies between a high density cellular exterior and a low density cellular interior 2000-11-14
6139934 Bottle closure 2000-10-31
6129870 Method for controlling skin thickness of plastic article made with controlled density 2000-10-10
6071461 Method of making a multiple-layer article having a plastic member with a surface application material effectively bonded thereto 2000-06-06
6060005 Low pressure method and apparatus for injection molding a plastic article 2000-05-09
6056902 Method and apparatus for molding a plastic article including injecting based upon a pressure-dominated control algorithm after detecting an indicia of a decrease in the surface area of the melt front 2000-05-02
5972259 Method for forming an angled plastic article of varying density 1999-10-26
5968440 Injection molded plastic article and method of molding same 1999-10-19
5945053 Extruded-in fabric hinge and method of making same 1999-08-31
5902525 Method of molding a plastic article including injecting based upon a pressure-dominated control algorithm after detecting an indicia of a decrease in the surface area of the melt front 1999-05-11
5898591 Article of manufacture having computer readable program code for molding an article and method of molding an article by providing computer readable program code Richard Osborne 1999-04-27
5853630 Low pressure method for injection molding a plastic article 1998-12-29
5788332 Seat unit and cushion 1998-08-04
5773038 Apparatus for family mold sequential molding 1998-06-30
5762852 Process for making molded-in lamina hinge 1998-06-09
5750001 Metal reinforced plastic article and method of forming same 1998-05-12
5665405 Self-contained molding apparatus and method for clamping the mold unit of an injection mold apparatus 1997-09-09
5618487 Multi-clamp mold and method for clamping an injection mold assembly 1997-04-08
5496508 Method of compressing and cooling plastic purge as it emanates from a plastic injection molding machine Peter J. Aretz 1996-03-05
5437823 Method for molding a plastic article of varied density Harold J. Buehl 1995-08-01
5422059 Method for injection molding a plastic part using a film gate 1995-06-06
5380186 Flow regulating assembly for a plastic injection machine James Ober 1995-01-10
5336460 Process for making molded-in lamina hinge 1994-08-09