Inventor · disambiguated record
Rainer Gras
Also filed as: GRAS RAINER · OBENDORF JOHANN
65 granted patents·872 citations·filing 1978–2003
99Inventor score
Top patents by PatentIndex Score
65 records- 0196US4483798APolyaddition products containing uretidione groups and process for their preparationHUELS CHEMISCHE WERKE AG·Filed 1981·Granted Nov 20, 1984·53 cites·13 claims
- 0293US4215165AMethod for coating of glass surfacesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Jul 29, 1980·57 cites·19 claims
- 0392US4463154APolyurethane powder enamels free of cleavage products as well as enamel coatings produced from such powdersHUELS CHEMISCHE WERKE AG·Filed 1983·Granted Jul 31, 1984·59 cites·14 claims
- 0492US4413079APowder enamels free of blocking agentsHUELS CHEMISCHE WERKE AG·Filed 1981·Granted Nov 1, 1983·59 cites·11 claims
- 0588US6613861B2Polyaddition products containing hydroxyl and uretdione groups, process for their preparation, their use for the production of highly reactive polyurethane powder coatings which are free from elimination products, and the polyurethane powder coatings produced accordinglyHUELS CHEMISCHE WERKE AG·Filed 2001·Granted Sep 2, 2003·21 cites·28 claims
- 0688US4246380APowdery polyurethane lacquers based on polyester resins and blocked isocyanatesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Jan 20, 1981·48 cites·10 claims
- 0782US4306051AIsocyanurate group-and terminally blocked isocyanate group-containing compoundsHUELS CHEMISCHE WERKE AG·Filed 1980·Granted Dec 15, 1981·11 cites·17 claims
- 0881US6916897B2Polyaddition products containing hydroxyl and uretdione groups, process for their preparation, their use for the production of highly reactive polyurethane powder coatings which are free from elimination products, and the polyurethane powder coatings produced accordinglyDEGUSSA·Filed 2003·Granted Jul 12, 2005·12 cites·24 claims
- 0981US6908980B2Polyaddition products containing hydroxyl and uretdione groups, process for their preparation, their use for the production of highly reactive polyurethane powder coatings which are free from elimination products, and the polyurethane powder coatings produced accordinglyDEGUSSA·Filed 2003·Granted Jun 21, 2005·12 cites·55 claims
- 1081US4925974AProcess for producing blocked, urea group-containing polyisocyanatesHUELS CHEMISCHE WERKE AG·Filed 1988·Granted May 15, 1990·26 cites·20 claims
- 1181US4268554AProcess for the coating of glass surfacesGRAS RAINER·Filed 1978·Granted May 19, 1981·30 cites·16 claims
- 1281US4200725AMethod of producing blocked polyisocyanates by reaction of an imidazoline with an isocyanateHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Apr 29, 1980·10 cites·24 claims
- 1380US4302351ACompounds containing isocyanuric groups and terminally blocked isocyanate groupsHUELS CHEMISCHE WERKE AG·Filed 1980·Granted Nov 24, 1981·26 cites·5 claims
- 1475US4355058APowdery coating media and their useHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Oct 19, 1982·22 cites·10 claims
- 1573US5633336APolyamines containing urea groups and process for their preparationHUELS CHEMISCHE WERKE AG·Filed 1995·Granted May 27, 1997·16 cites·11 claims
- 1673US5173560ACold-curing solvent free, duroplastic polyurethane-polyurea compoundsHUELS CHEMISCHE WERKE AG·Filed 1991·Granted Dec 22, 1992·19 cites·15 claims
- 1773US4782128APolyurethane powder coating compositions which yield a matte surface after settingHUELS CHEMISCHE WERKE AG·Filed 1988·Granted Nov 1, 1988·18 cites·7 claims
- 1871US4246132AIsocyanurate group-and terminally-blocked isocyanate group-containing mixturesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Jan 20, 1981·14 cites·17 claims
- 1970US5859164AUretdione-functional polyaddition compounds, a process for their preparation, and their useHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Jan 12, 1999·21 cites·16 claims
- 2070US5646228AProcess for the preparation of blocked polyisocyanates, and their use in polyurethane coating systemsHUELS CHEMISCHE WERKE AG·Filed 1995·Granted Jul 8, 1997·17 cites·16 claims
- 2170US4210687AMethod for the coating of glass surfacesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Jul 1, 1980·31 cites·9 claims
- 2269US4313876AProduction of isophoronediisocyanate adducts containing free NCO-grops and NCO-groups end blocked with ε-caprolactamHUELS CHEMISCHE WERKE AG·Filed 1980·Granted Feb 2, 1982·18 cites·5 claims
- 2367US5847067AUretdione-functional polyisocyanates, a process for their preparation, and their useHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Dec 8, 1998·19 cites·9 claims
- 2466US4658005AStorage-stabile polyurethane resin powder enamels or varnishesHUELS CHEMISCHE WERKE AG·Filed 1985·Granted Apr 14, 1987·14 cites·6 claims
- 2564US4500696APowder surface coatingsHUELS CHEMISCHE WERKE AG·Filed 1984·Granted Feb 19, 1985·14 cites·14 claims
- 2662US6051675ABlocked polyisocyanates, a process for their preparation, and their useHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Apr 18, 2000·12 cites·4 claims
- 2759US5541279AProcess for the preparation of blocked polyisocyanates, and their use in polyurethane coating systemsHUELS CHEMISCHE WERKE AG·Filed 1994·Granted Jul 30, 1996·8 cites·11 claims
- 2859US4528355APowder varnishes based on partially blocked isophorone diisocyanate isocyanurate and hydroxyl group containing polyester, and method for producing matte coatingsHUELS CHEMISCHE WERKE AG·Filed 1984·Granted Jul 9, 1985·12 cites·14 claims
- 2958US5153296AEpoxide resin mixtures which harden at room temperatureHUELS CHEMISCHE WERKE AG·Filed 1991·Granted Oct 6, 1992·10 cites·11 claims
- 3058US4920173APUR powder paints for matt coatingsHUELS CHEMISCHE WERKE AG·Filed 1988·Granted Apr 24, 1990·10 cites·23 claims
- 3158US4354014APowdered coating compositions having good storage stability and production of sameHUELS CHEMISCHE WERKE AG·Filed 1980·Granted Oct 12, 1982·12 cites·6 claims
- 3257US6437074B1Blocked polyisocyanates, a process for their preparation, and their useDEGUSSA·Filed 2000·Granted Aug 20, 2002·2 cites·1 claims
- 3357US5331078ABlocked highly functional polyisocyanate adducts, a process for the preparation thereof and the use thereofHUELS CHEMISCHE WERKE AG·Filed 1992·Granted Jul 19, 1994·9 cites·18 claims
- 3457US4383076ASingle component enamels based on blocked polyisocyanurate polyisocyanatesWOLF ELMAR·Filed 1980·Granted May 10, 1983·12 cites·8 claims
- 3555US4649067AOne-component baking enamelsHUELS CHEMISCHE WERKE AG·Filed 1984·Granted Mar 10, 1987·10 cites·16 claims
- 3655US4258186AProcess for the preparation of blocked polyisocyanatesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Mar 24, 1981·10 cites·16 claims
- 3750US6166164ABlocked polyisocyanates, a process for their preparation, and their useHUELS CHEMISCHE WERKE AG·Filed 1999·Granted Dec 26, 2000·7 cites·9 claims
- 3850US4256788AProcess for the coating of glass surfacesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Mar 17, 1981·9 cites·18 claims
- 3949US5719240ACompounds containing cyclic amidine and uretdione groups, a process for their preparation and the use thereofHUELS CHEMISCHE WERKE AG·Filed 1996·Granted Feb 17, 1998·9 cites·14 claims
- 4049US4500697AMixture of substances suitable for use as a powder varnish or binder for powder varnishesHUELS CHEMISCHE WERKE AG·Filed 1984·Granted Feb 19, 1985·8 cites·12 claims
- 4149US4430474AStoving enamel containing blocked isocyanatesHUELS CHEMISCHE WERKE AG·Filed 1981·Granted Feb 7, 1984·8 cites·5 claims
- 4248US5218040ALight-stabile, reactive two-component pur paints which cure at room temperatureHUELS CHEMISCHE WERKE AG·Filed 1991·Granted Jun 8, 1993·6 cites·7 claims
- 4347US4242248AStorage-stable baking lacquers prepared from polyisocyanates blocked with cyclic amidinesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Dec 30, 1980·6 cites·7 claims
- 4444US4255551ACoating materials and their application prepared from polyisocyanates blocked with imidazolinesHUELS CHEMISCHE WERKE AG·Filed 1978·Granted Mar 10, 1981·6 cites·14 claims
- 4543US5728795AProcess for the preparation of blocked polyisocyanates, and their use in polyurethane coating systemsHUELS CHEMISCHE WERKE AG·Filed 1996·Granted Mar 17, 1998·5 cites·2 claims
- 4642US5852154ACold-curing, low-solvent or solvent-free 2-component polyurethane/polyurea compositionsHUELS CHEMISCHE WERKE AG·Filed 1996·Granted Dec 22, 1998·6 cites·4 claims
- 4742US4879356AMethod of manufacturing single-component polyurethane baking enamelsHUELS CHEMISCHE WERKE AG·Filed 1988·Granted Nov 7, 1989·4 cites·18 claims
- 4840US5955558ABlocked polyisocyanates with built-in HALS stabilizerHUELS CHEMISCHE WERKE AG·Filed 1997·Granted Sep 21, 1999·4 cites·18 claims
- 4940US5750727APolyisocyanates containing uretdione groupsHUELS CHEMISCHE WERKE AG·Filed 1996·Granted May 12, 1998·4 cites·8 claims
- 5040US5608016ASalts of pyromellitic acid, and their use as epoxy resin curing agentsHUELS CHEMISCHE WERKE AG·Filed 1996·Granted Mar 4, 1997·1 cites·5 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Rainer Gras files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →