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.
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