Assignee
VON ROLL AG
CH·66 granted patents·1,292 citations·filing 1974–1994
Top patents by PatentIndex Score
66 records- 0193US3943334AHeat weldable, thermoplastic fittingVON ROLL AG·Filed 1974·Granted Mar 9, 1976·68 cites·10 claims
- 0287US4117311AElectric welding muffVON ROLL AG·Filed 1977·Granted Sep 26, 1978·49 cites·13 claims
- 0383US4925337AManhole coveringVON ROLL AG·Filed 1988·Granted May 15, 1990·46 cites·5 claims
- 0483US4313053AWelding sleeve of thermoplastic materialVON ROLL AG·Filed 1980·Granted Jan 26, 1982·33 cites·7 claims
- 0582US5071177ALocking device for the positive holding of a cover or grate in a frameVON ROLL AG·Filed 1988·Granted Dec 10, 1991·49 cites·22 claims
- 0678US4224505AElectrically welding plastic sleeveVON ROLL AG·Filed 1978·Granted Sep 23, 1980·37 cites·12 claims
- 0777US4530521AElectrically weldable socket for joining pipe membersVON ROLL AG·Filed 1984·Granted Jul 23, 1985·58 cites·7 claims
- 0876US4463688AGrate block for a refuse incineration grateVON ROLL AG·Filed 1983·Granted Aug 7, 1984·30 cites·16 claims
- 0975US4909660AGrating with a locking mechanismVON ROLL AG·Filed 1988·Granted Mar 20, 1990·34 cites·3 claims
- 1075US4056068AProcess for conditioning flue gases in waste material incineration plants with heat utilizationVON ROLL AG·Filed 1976·Granted Nov 1, 1977·29 cites·12 claims
- 1175US4018168AIncinerator feedVON ROLL AG·Filed 1976·Granted Apr 19, 1977·34 cites·20 claims
- 1274US4861186ACovering for an opening with a cover or grating placed in a frameVON ROLL AG·Filed 1988·Granted Aug 29, 1989·34 cites·13 claims
- 1374US4206905AGate valveVON ROLL AG·Filed 1978·Granted Jun 10, 1980·37 cites·9 claims
- 1471US4952094AGround water drainVON ROLL AG·Filed 1989·Granted Aug 28, 1990·34 cites·12 claims
- 1568US4873795ACovering for a ground openingVON ROLL AG·Filed 1988·Granted Oct 17, 1989·26 cites·14 claims
- 1668US4315712ALoading method and device for feeding waste-filled containers into a rotary incineratorVON ROLL AG·Filed 1979·Granted Feb 16, 1982·24 cites·16 claims
- 1766US5056955ALocking device for coverings for manholes and other ground openingsVON ROLL AG·Filed 1990·Granted Oct 15, 1991·33 cites·20 claims
- 1865US4703150AWeldable connecting member for connecting or joining thermoplastic pipe elementsVON ROLL AG·Filed 1985·Granted Oct 27, 1987·31 cites·15 claims
- 1965US4349219AWelding muff of thermoplastic materialVON ROLL AG·Filed 1979·Granted Sep 14, 1982·24 cites·10 claims
- 2063US5045292AProcess for the removal of nitric oxides from flue gasesVON ROLL AG·Filed 1990·Granted Sep 3, 1991·29 cites·5 claims
- 2162US4325396AApparatus for cleaning a filter pressVON ROLL AG·Filed 1980·Granted Apr 20, 1982·25 cites·11 claims
- 2261US4876916ACast shafts, particularly camshaftsVON ROLL AG·Filed 1987·Granted Oct 31, 1989·18 cites·10 claims
- 2361US4269232AProtective cap for pipesVON ROLL AG·Filed 1979·Granted May 26, 1981·32 cites·5 claims
- 2460US5340232AManhole coverVON ROLL AG·Filed 1990·Granted Aug 23, 1994·22 cites·21 claims
- 2560US4188892AMethod and apparatus for removal of fly ash from a waste incinerator with liquid slag dischargeVON ROLL AG·Filed 1978·Granted Feb 19, 1980·20 cites·20 claims
- 2659US4707272AMethod for controlling and optimizing the operation of a perforated belt press for filtering slurryVON ROLL AG·Filed 1986·Granted Nov 17, 1987·32 cites·8 claims
- 2758US4648633ASocket jointVON ROLL AG·Filed 1985·Granted Mar 10, 1987·28 cites·12 claims
- 2857US4276835Amethod for processing sewage sludgeVON ROLL AG·Filed 1979·Granted Jul 7, 1981·21 cites·9 claims
- 2956US5160213ACovering for a ground openingVON ROLL AG·Filed 1990·Granted Nov 3, 1992·21 cites·7 claims
- 3054US5112270AMethod for stunning animals for slaughterVON ROLL AG·Filed 1990·Granted May 12, 1992·35 cites·26 claims
- 3154US4563278ABelt filter press with ribs for filtering a heavy liquidVON ROLL AG·Filed 1983·Granted Jan 7, 1986·14 cites·8 claims
- 3253US5246578AFilter press and cleaning means thereforVON ROLL AG·Filed 1992·Granted Sep 21, 1993·21 cites·17 claims
- 3353US4362616AApparatus for moving the filter plates of a filter pressVON ROLL AG·Filed 1981·Granted Dec 7, 1982·16 cites·7 claims
- 3452US4132640AProcess for the hygienic elimination of sewage containing salt-containing organic substancesVON ROLL AG·Filed 1977·Granted Jan 2, 1979·20 cites·13 claims
- 3551US4936703AFrame for a covering for an opening protected by a cover or gratingVON ROLL AG·Filed 1988·Granted Jun 26, 1990·15 cites·12 claims
- 3650US5230293AMethod and apparatus for controlling a refuse incineration plantVON ROLL AG·Filed 1992·Granted Jul 27, 1993·19 cites·11 claims
- 3748US4350102ACombined combustion and melting furnace for solid, pasty and liquid waste materialsVON ROLL AG·Filed 1981·Granted Sep 21, 1982·10 cites·8 claims
- 3847US4530520AElectrically weldable bushingsVON ROLL AG·Filed 1984·Granted Jul 23, 1985·18 cites·6 claims
- 3947US4317671AProcess of composting refuse or refuse/sewage sludge mixtures by thermal rettingVON ROLL AG·Filed 1980·Granted Mar 2, 1982·7 cites·23 claims
- 4046US4202280AFurnace flue apparatus for improved fly ash separationVON ROLL AG·Filed 1978·Granted May 13, 1980·12 cites·19 claims
- 4145US5367116AProcess for the disposal of flue gas residuesVON ROLL AG·Filed 1993·Granted Nov 22, 1994·15 cites·10 claims
- 4245US4031192AMethod of hygienic disposal of chlorine-containing plastic materialVON ROLL AG·Filed 1975·Granted Jun 21, 1977·7 cites·8 claims
- 4344US3934521ACombustion apparatusVON ROLL AG·Filed 1974·Granted Jan 27, 1976·8 cites·39 claims
- 4442US4243635AWaste incinerator exhaust gas treatment and apparatusVON ROLL AG·Filed 1978·Granted Jan 6, 1981·13 cites·4 claims
- 4540US3957075AFlow-sensitive pressure limiting valve for hydraulic equipmentVON ROLL AG·Filed 1975·Granted May 18, 1976·10 cites·4 claims
- 4637US4712652AElevator for transporting people and goods with an annular travelling cabinVON ROLL AG·Filed 1986·Granted Dec 15, 1987·12 cites·19 claims
- 4735US5387407AProcess for the recovery of ammonia from flue gasesVON ROLL AG·Filed 1990·Granted Feb 7, 1995·8 cites·15 claims
- 4832US4909664AArrangement for draining liquid collecting on a ground surfaceVON ROLL AG·Filed 1988·Granted Mar 20, 1990·6 cites·4 claims
- 4932US4461705AEndless chain driven rack and pinion displacement device for filter pressesVON ROLL AG·Filed 1982·Granted Jul 24, 1984·6 cites·6 claims
- 5032US4080910AProcess for cooling the flue gases in waste material incineration plants without heat utilizationVON ROLL AG·Filed 1976·Granted Mar 28, 1978·9 cites·9 claims
Showing the top 50 of 66 patent records by PatentIndex Score.
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