Assignee
WERNER & PFLEIDERER
DE·118 granted patents·3,003 citations·filing 1974–1996
Top patents by PatentIndex Score
118 records- 0198US4544279AApparatus for mixing and proportioning several mixing componentsWERNER & PFLEIDERER·Filed 1984·Granted Oct 1, 1985·106 cites·2 claims
- 0298US4498783AProcess for mixing and proportioning several mixing componentsWERNER & PFLEIDERER·Filed 1982·Granted Feb 12, 1985·127 cites·3 claims
- 0395US4213747AMethod of and apparatus for controlling the viscosity of molten plastics material which is to be mouldedWERNER & PFLEIDERER·Filed 1978·Granted Jul 22, 1980·98 cites·9 claims
- 0494US4684488AMethod and apparatus for controlled supply of color concentrates into an extruder to obtain a plastic product of desired colorationWERNER & PFLEIDERER·Filed 1986·Granted Aug 4, 1987·86 cites·7 claims
- 0594US4361100AProcedure and installation for the incinerating of sludgeWERNER & PFLEIDERER·Filed 1981·Granted Nov 30, 1982·93 cites·15 claims
- 0692US5318358AScrew kneader for plastic material having a controlling mixing sectionWERNER & PFLEIDERER·Filed 1992·Granted Jun 7, 1994·105 cites·12 claims
- 0792US4321026ADevice for granulating plastic strandsWERNER & PFLEIDERER·Filed 1979·Granted Mar 23, 1982·60 cites·10 claims
- 0890US5879602AApparatus and method for impregnating fibrous strands with plastic materialWERNER & PFLEIDERER·Filed 1996·Granted Mar 9, 1999·62 cites·22 claims
- 0990US4824256ACo-rotating twin-screw kneaders with kneading disksWERNER & PFLEIDERER·Filed 1986·Granted Apr 25, 1989·81 cites·9 claims
- 1087US4760129AProcess for preparing highly viscous polyhexamethyleneadipamideWERNER & PFLEIDERER·Filed 1986·Granted Jul 26, 1988·60 cites·11 claims
- 1187US4234259AMixing apparatus for kneading of plastic substancesWERNER & PFLEIDERER·Filed 1979·Granted Nov 18, 1980·57 cites·8 claims
- 1286US5110275AExtruder for the preparation of plastic material with the introduction of at least one fibre strandWERNER & PFLEIDERER·Filed 1991·Granted May 5, 1992·66 cites·10 claims
- 1386US4468256AProcess for the hydrolysis of cellulose from vegetable raw materials to glucose and apparatus for performing the processWERNER & PFLEIDERER·Filed 1981·Granted Aug 28, 1984·37 cites·14 claims
- 1485US5098586AMethod for the gentle separation of granulate and waterWERNER & PFLEIDERER·Filed 1990·Granted Mar 24, 1992·53 cites·15 claims
- 1585US4708746AMethod the hydrolytic splitting of acid treated comminuted crude cellulose with steamWERNER & PFLEIDERER·Filed 1984·Granted Nov 24, 1987·34 cites·1 claims
- 1683US4984977AScrew-type extruder having a starting valve and throttleWERNER & PFLEIDERER·Filed 1989·Granted Jan 15, 1991·53 cites·6 claims
- 1782US5080845AMethod of removing impurities from polymeric synthetic plastics materials and an apparatus for carrying out the methodWERNER & PFLEIDERER·Filed 1989·Granted Jan 14, 1992·40 cites·2 claims
- 1880US4938605AApparatus and method for mixing and continuous extrusion of a plastic massWERNER & PFLEIDERER·Filed 1988·Granted Jul 3, 1990·41 cites·16 claims
- 1980US4900156ATwin screw extruder with thread-free mixing zonesWERNER & PFLEIDERER·Filed 1988·Granted Feb 13, 1990·40 cites·9 claims
- 2080US4107787AScrew extruder for continuously processing and degasing of elastomers and polymers having a viscosity of more than 1,000 poiseWERNER & PFLEIDERER·Filed 1977·Granted Aug 15, 1978·42 cites·10 claims
- 2178US4455091AProcess for regulating the mixing process of rubber mixtures in an internal mixerWERNER & PFLEIDERER·Filed 1981·Granted Jun 19, 1984·44 cites·4 claims
- 2278US4084263AKneading and mixing machineWERNER & PFLEIDERER·Filed 1977·Granted Apr 11, 1978·32 cites·4 claims
- 2376US5187880ACentrifugal dryer for separation of surface water from plastic granulesWERNER & PFLEIDERER·Filed 1992·Granted Feb 23, 1993·26 cites·13 claims
- 2476US4786514AMethod and apparatus for extruding a food productWERNER & PFLEIDERER·Filed 1987·Granted Nov 22, 1988·36 cites·13 claims
- 2576US4395212AScreen-change device for extrudersWERNER & PFLEIDERER·Filed 1981·Granted Jul 26, 1983·29 cites·9 claims
- 2675US5573332AScrew element for a screw-like extrusion machineWERNER & PFLEIDERER·Filed 1996·Granted Nov 12, 1996·33 cites·14 claims
- 2775US5338112AProcess and apparatus for two stage treatment of plastic materialsWERNER & PFLEIDERER·Filed 1992·Granted Aug 16, 1994·40 cites·19 claims
- 2874US5332308AProcess and apparatus for production of plastics containing additivesWERNER & PFLEIDERER·Filed 1992·Granted Jul 26, 1994·37 cites·12 claims
- 2974US5232649AMethod of removing liquids from solidsWERNER & PFLEIDERER·Filed 1992·Granted Aug 3, 1993·41 cites·14 claims
- 3074US4764100APerforated plate for the underwater granulating of extruded strands of thermoplastic materialWERNER & PFLEIDERER·Filed 1986·Granted Aug 16, 1988·34 cites·13 claims
- 3173US5309947AApparatus for lining an inside wall of a sewer pipeWERNER & PFLEIDERER·Filed 1992·Granted May 10, 1994·43 cites·18 claims
- 3273US4931229AMethod and apparatus for protecting a screw extruder producing strand-shaped explosives and propellantsWERNER & PFLEIDERER·Filed 1989·Granted Jun 5, 1990·22 cites·19 claims
- 3373US4877390ADegassification device for a screw extruder which processes plastic materialWERNER & PFLEIDERER·Filed 1988·Granted Oct 31, 1989·31 cites·14 claims
- 3473US4255161AApparatus for introducing solid fuels into a pressure gasification reactorWERNER & PFLEIDERER·Filed 1979·Granted Mar 10, 1981·16 cites·11 claims
- 3573US4058297AInternal mixerWERNER & PFLEIDERER·Filed 1975·Granted Nov 15, 1977·24 cites·5 claims
- 3672US4570359AApparatus for the dewatering and drying of plastic granulateWERNER & PFLEIDERER·Filed 1984·Granted Feb 18, 1986·24 cites·14 claims
- 3771US5593227ATwin-shaft screw-type extruding machine having mixing elements with wingsWERNER & PFLEIDERER·Filed 1995·Granted Jan 14, 1997·31 cites·14 claims
- 3871US4354814AExtruder with a sheet extrusion head and an associated calenderWERNER & PFLEIDERER·Filed 1980·Granted Oct 19, 1982·32 cites·7 claims
- 3971US4036540AScrew extruder housingWERNER & PFLEIDERER·Filed 1975·Granted Jul 19, 1977·27 cites·8 claims
- 4070US5335991APlastic melt extruder having an adjustable throttling gap of non-uniform widthWERNER & PFLEIDERER·Filed 1993·Granted Aug 9, 1994·29 cites·14 claims
- 4170US5203256AContinuous fermenting chamber for dough productsWERNER & PFLEIDERER·Filed 1992·Granted Apr 20, 1993·47 cites·15 claims
- 4270US4208574ATemperature controllable heater plate for moldsWERNER & PFLEIDERER·Filed 1978·Granted Jun 17, 1980·22 cites·6 claims
- 4369US5139345ATemperature sensor for mixing and kneading machinesWERNER & PFLEIDERER·Filed 1991·Granted Aug 18, 1992·33 cites·18 claims
- 4467US5679380AUnderwater pelletizing die plateWERNER & PFLEIDERER·Filed 1996·Granted Oct 21, 1997·29 cites·16 claims
- 4566US4028027AScrew housing for a screw machineWERNER & PFLEIDERER·Filed 1975·Granted Jun 7, 1977·24 cites·10 claims
- 4665US4934916APerforated plate for the underwater granulating of plastic strandsWERNER & PFLEIDERER·Filed 1989·Granted Jun 19, 1990·22 cites·15 claims
- 4764US4850835ACooling device for plastic granulateWERNER & PFLEIDERER·Filed 1987·Granted Jul 25, 1989·20 cites·15 claims
- 4863US4861615AMethods for preparing chocolate mixturesWERNER & PFLEIDERER·Filed 1987·Granted Aug 29, 1989·37 cites·15 claims
- 4963US4597870AFilter device for a screw extruderWERNER & PFLEIDERER·Filed 1985·Granted Jul 1, 1986·23 cites·11 claims
- 5063US4437766AMixer having two feed worms defining upper and lower mixing regions with an intermediate equilibrium zoneWERNER & PFLEIDERER·Filed 1982·Granted Mar 20, 1984·32 cites·7 claims
Showing the top 50 of 118 patent records by PatentIndex Score.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →