Assignee
HPM CORP
US·39 granted patents·895 citations·filing 1974–1998
Top patents by PatentIndex Score
39 records- 0194US4816197AAdaptive process control for injection moldingHPM CORP·Filed 1988·Granted Mar 28, 1989·102 cites·15 claims
- 0291US4173417AExtrusion apparatus and methodHPM CORP·Filed 1978·Granted Nov 6, 1979·63 cites·20 claims
- 0389US4277182AExtruder with short cycle multichannel wave screwHPM CORP·Filed 1979·Granted Jul 7, 1981·56 cites·19 claims
- 0488US4125585AProcess employing coextrusion feedblockHPM CORP·Filed 1976·Granted Nov 14, 1978·52 cites·11 claims
- 0584US4208175ACoextrusion feedblock and processHPM CORP·Filed 1978·Granted Jun 17, 1980·42 cites·5 claims
- 0684US4146601AInjection molding process controlHPM CORP·Filed 1974·Granted Mar 27, 1979·40 cites·11 claims
- 0778US5035509AMulti-channel extrusion screw with a zig-zag undercut barrierHPM CORP·Filed 1990·Granted Jul 30, 1991·42 cites·16 claims
- 0876US4161380AInjection molding process controlHPM CORP·Filed 1978·Granted Jul 17, 1979·30 cites·12 claims
- 0971US4074362AVented injection molding machineHPM CORP·Filed 1976·Granted Feb 14, 1978·27 cites·9 claims
- 1070US4299792AInjection molding process utilizing low shear screwHPM CORP·Filed 1980·Granted Nov 10, 1981·28 cites·5 claims
- 1169US6056430APlasticating apparatus having a multichannel wave screw with a cross channel solids transitionHPM CORP·Filed 1998·Granted May 2, 2000·37 cites·25 claims
- 1269US4387834ACombination thermoplastic and glass loaded thermosetting injection molding machine and method for operating sameHPM CORP·Filed 1980·Granted Jun 14, 1983·28 cites·7 claims
- 1369US4306848AInjection molding apparatus having low shear screwHPM CORP·Filed 1980·Granted Dec 22, 1981·29 cites·9 claims
- 1468US4850217AAdaptive process control for injection moldingHPM CORP·Filed 1988·Granted Jul 25, 1989·26 cites·2 claims
- 1566US4285600AInjection molding machine with multichannel wave screwHPM CORP·Filed 1979·Granted Aug 25, 1981·21 cites·26 claims
- 1663US4925313AMixing screw for extrusion and injection moldingHPM CORP·Filed 1988·Granted May 15, 1990·22 cites·16 claims
- 1763US4112519AVented injection molding machine and methodHPM CORP·Filed 1976·Granted Sep 5, 1978·18 cites·9 claims
- 1861US4356140AExtrusion method with short cycle multichannel wave screwHPM CORP·Filed 1981·Granted Oct 26, 1982·22 cites·2 claims
- 1959US5219590ATriple channel wave screwHPM CORP·Filed 1991·Granted Jun 15, 1993·19 cites·20 claims
- 2055US4997358AApparatus for reconfiguring finishing rolls in a plastic sheet fabrication sheetlineHPM CORP·Filed 1989·Granted Mar 5, 1991·17 cites·15 claims
- 2155US4362205ARotor die casting methodHPM CORP·Filed 1981·Granted Dec 7, 1982·9 cites·19 claims
- 2253US4886106ADie cast machine with a turretHPM CORP·Filed 1988·Granted Dec 12, 1989·15 cites·17 claims
- 2351US5375992ATriple channel wave screwHPM CORP·Filed 1993·Granted Dec 27, 1994·14 cites·20 claims
- 2450US5565224AElectric injection molding machineHPM CORP·Filed 1995·Granted Oct 15, 1996·13 cites·20 claims
- 2548US6132075AMultichannel wave screw with a slush channel barrier sectionHPM CORP·Filed 1998·Granted Oct 17, 2000·15 cites·20 claims
- 2645US6179600B1Process and device for hydraulic drive of injection molding machinesHPM CORP·Filed 1995·Granted Jan 30, 2001·9 cites·3 claims
- 2745US4363768AMethod of injection molding employing multichannel wave screwHPM CORP·Filed 1981·Granted Dec 14, 1982·11 cites·3 claims
- 2844US5529478ADevice for hydraulic drive of injection molding machinesHPM CORP·Filed 1994·Granted Jun 25, 1996·9 cites·12 claims
- 2944US4042660AMottled appearance injection molding methodsHPM CORP·Filed 1976·Granted Aug 16, 1977·9 cites·1 claims
- 3041US4421467AInjection molding machine diagnostic systemHPM CORP·Filed 1982·Granted Dec 20, 1983·14 cites·15 claims
- 3141US4271895AAutomatic part loader unit for multi-cavity rotor die and method of operationHPM CORP·Filed 1980·Granted Jun 9, 1981·5 cites·20 claims
- 3240US4030186AMethod for facilitating access to the mold halves of a molding machineHPM CORP·Filed 1975·Granted Jun 21, 1977·8 cites·4 claims
- 3337US4342717AInjection moulding method and apparatus with mould runner reservoir and shot extensionHPM CORP·Filed 1980·Granted Aug 3, 1982·10 cites·1 claims
- 3436US6234659B1Surge suppressor for vented injection molding machine screwHPM CORP·Filed 1998·Granted May 22, 2001·8 cites·13 claims
- 3536US4280972ACombination thermoplastic and glass loaded thermosetting injection molding machine and method for operating sameHPM CORP·Filed 1979·Granted Jul 28, 1981·5 cites·7 claims
- 3634US5397526AMethod for reconfiguring finishing rolls in a plastic sheet fabrication sheetlineHPM CORP·Filed 1994·Granted Mar 14, 1995·7 cites·5 claims
- 3734US4240781AInjection molding machine having dual tonnage traversing cylinderHPM CORP·Filed 1978·Granted Dec 23, 1980·7 cites·11 claims
- 3830US4628983AMethod and apparatus for making hollow sheel cores with controlled gas flowHPM CORP·Filed 1985·Granted Dec 16, 1986·3 cites·27 claims
- 3925US4312828AMethod for opening die sectionsHPM CORP·Filed 1980·Granted Jan 26, 1982·3 cites·3 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →