Inventor · disambiguated record
Siebolt Hettinga
Also filed as: HETTINGA SIEBOLT
38 granted patents·949 citations·filing 1976–1999
98Inventor score
Top patents by PatentIndex Score
38 records- 0193US4350193APower tool accessory tableCENTRAL QUALITY IND INC·Filed 1980·Granted Sep 21, 1982·67 cites·13 claims
- 0292US4743323AMethod of molding a composite articleHETTINGA SIEBOLT·Filed 1986·Granted May 10, 1988·74 cites·10 claims
- 0389US4307057AMethod for aligning an injection mold with a nozzle at the mold injection stationHETTINGA SIEBOLT·Filed 1980·Granted Dec 22, 1981·31 cites·6 claims
- 0488US5853630ALow pressure method for injection molding a plastic articleHETTINGA SIEBOLT·Filed 1997·Granted Dec 29, 1998·54 cites·21 claims
- 0586US6056902AMethod 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 frontFiled 1998·Granted May 2, 2000·45 cites·12 claims
- 0684US5788332ASeat unit and cushionFiled 1996·Granted Aug 4, 1998·69 cites·27 claims
- 0783US6129870AMethod for controlling skin thickness of plastic article made with controlled densityFiled 1997·Granted Oct 10, 2000·47 cites·16 claims
- 0881US5945053AExtruded-in fabric hinge and method of making sameFiled 1998·Granted Aug 31, 1999·49 cites·12 claims
- 0980US5898591AArticle of manufacture having computer readable program code for molding an article and method of molding an article by providing computer readable program codeFiled 1996·Granted Apr 27, 1999·46 cites·31 claims
- 1080US5773038AApparatus for family mold sequential moldingFiled 1995·Granted Jun 30, 1998·44 cites·15 claims
- 1179US4397806AMethod and apparatus for mold injectionHETTINGA SIEBOLT·Filed 1981·Granted Aug 9, 1983·15 cites·3 claims
- 1277US4613475AClamping structure and method for clamping the mold unit of a mold injection apparatusHETTINGA SIEBOLT·Filed 1985·Granted Sep 23, 1986·37 cites·5 claims
- 1373US5902525AMethod 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 frontFiled 1996·Granted May 11, 1999·27 cites·38 claims
- 1473US4125490AMethod of forming dimensionally stable foamed articles of polyvinyl aromatic resins and resultant productHETTINGA SIEBOLT·Filed 1976·Granted Nov 14, 1978·25 cites·9 claims
- 1572US5139714AProcess for injection molding a hollow plastic articleHETTINGA SIEBOLT·Filed 1991·Granted Aug 18, 1992·32 cites·27 claims
- 1670US5336460AProcess for making molded-in lamina hingeHETTINGA SIEBOLT·Filed 1993·Granted Aug 9, 1994·30 cites·12 claims
- 1768US5275764AMethod of molding a vehicle lamp assemblyHETTINGA SIEBOLT·Filed 1991·Granted Jan 4, 1994·34 cites·10 claims
- 1866USD282847STilt and rotate base for a display monitorHETTINGA SIEBOLT·Filed 1983·Granted Mar 4, 1986·9 cites·1 claims
- 1960US6149998AHeat laminated fabric hinge and method of making sameFiled 1998·Granted Nov 21, 2000·26 cites·26 claims
- 2060US6146562AMethod of injection molding an article with a cellular density distribution which gradually varies between a high density cellular exterior and a low density cellular interiorFiled 1998·Granted Nov 14, 2000·19 cites·18 claims
- 2158US5618487AMulti-clamp mold and method for clamping an injection mold assemblyFiled 1995·Granted Apr 8, 1997·19 cites·4 claims
- 2257US6060005ALow pressure method and apparatus for injection molding a plastic articleFiled 1998·Granted May 9, 2000·14 cites·8 claims
- 2353US5762852AProcess for making molded-in lamina hingeFiled 1994·Granted Jun 9, 1998·19 cites·8 claims
- 2451US5437823AMethod for molding a plastic article of varied densityFiled 1993·Granted Aug 1, 1995·20 cites·8 claims
- 2551US5151237AMethod of injection molding a flat deformable laminateHETTINGA SIEBOLT·Filed 1990·Granted Sep 29, 1992·15 cites·5 claims
- 2650US5972259AMethod for forming an angled plastic article of varying densityFiled 1995·Granted Oct 26, 1999·11 cites·17 claims
- 2747US6139934ABottle closureFiled 1998·Granted Oct 31, 2000·11 cites·20 claims
- 2847US5422059AMethod for injection molding a plastic part using a film gateFiled 1993·Granted Jun 6, 1995·12 cites·17 claims
- 2943US5380186AFlow regulating assembly for a plastic injection machineFiled 1992·Granted Jan 10, 1995·16 cites·12 claims
- 3037USD247877SSquareFOAM MOLDING CORP OF IOWA·Filed 1976·Granted May 16, 1978·2 cites·1 claims
- 3136US5968440AInjection molded plastic article and method of molding sameFiled 1996·Granted Oct 19, 1999·5 cites·24 claims
- 3236US5665405ASelf-contained molding apparatus and method for clamping the mold unit of an injection mold apparatusFiled 1995·Granted Sep 9, 1997·5 cites·34 claims
- 3336US5496508AMethod of compressing and cooling plastic purge as it emanates from a plastic injection molding machineFiled 1994·Granted Mar 5, 1996·8 cites·15 claims
- 3436US5110532AMethod for molding a laminateHETTINGA SIEBOLT·Filed 1991·Granted May 5, 1992·6 cites·4 claims
- 3534US5750001AMetal reinforced plastic article and method of forming sameFiled 1996·Granted May 12, 1998·3 cites·25 claims
- 3631US6217973B1Plastic article of varying densityFiled 1999·Granted Apr 17, 2001·1 cites·6 claims
- 3730US6071461AMethod of making a multiple-layer article having a plastic member with a surface application material effectively bonded theretoFiled 1996·Granted Jun 6, 2000·0 cites·11 claims
- 3826US4286731ASoap leaf sheet dispenserPARACHEM CORP·Filed 1980·Granted Sep 1, 1981·2 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →