An aircraft having vertical takeoff and landing capability provided with at least first and second laterally extending paddle wheels rotatable on a central axis perpendicular to the longitudinal axis of the aircraft fuselage and between its nose and tail.
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7432399 | Diols formed by ring-opening of epoxies A polyol monomer comprising the formula: R1 and R3 are —H, aliphatic, aromatic, or ether; R2 is aliphatic, aromatic, ester, ether, or acrylic, and R1 contains a hydroxyl group, ... | 10/07/2008 |
| 7288681 | 2-nitratoethyl oxirane, poly(2-nitratoethyl oxirane) and preparation method thereof A synthesis of an energetic prepolymer used as a high-energy binder for an insensitive and high performance explosive is disclosed. More specifically, provided are a novel compound 2-nitratoethyl oxirane expressed by formula III, a novel compound poly(2-nitratoethyl... | 10/30/2007 |
| 7223803 | Polyethylene (glycol) derivatives with proximal reactive groups An activated, substantially water soluble poly(ethylene glycol) is provided having of a linear or branched poly(ethylene glycol) backbone and at least one terminus linked to the backbone through a hydrolytically stable linkage, wherein the terminus is branched and h... | 05/29/2007 |
| 7135600 | Phenethanolamine derivatives for treatment of respiratory diseases The present invention relates to novel compounds of Formula (I), to a process for their manufacture, to pharmaceutical compositions containing them, and to their use in therapy, in particular their use in the prophylaxis and treatment of respiratory diseases. ... | 11/14/2006 |
| 7030278 | Polyethylene(Glycol) derivatives with proximal reactive groups An activated, substantially water soluble poly(ethylene glycol) is provided having of a linear or branched poly(ethylene glycol) backbone and at least one terminus linked to the backbone through a hydrolytically stable linkage, wherein the terminus is branched and h... | 04/18/2006 |
| 6984759 | Process for the preparation of perfluoropolyethers having aldehyde, alcohol, amine end groups by catalytic reduction Process for the perfluoropolyether preparation having reactive end groups —CH2NH2, —CHO, —CH2OH, by reduction of the corresponding perfluoropolyethers having —CN, —COCl, —CHO end groups by using gaseous hydrogen in the pr... | 01/10/2006 |
| 6649780 | Cationic lipids Cationic lipids are provided which are useful in the preparation of liposomes and other lipid vesicle carriers. The lipids of the invention are particularly useful as carriers of nucleic acids and other negatively charged substances, for delivery to cells... | 11/18/2003 |
| 6608230 | Single-stage method for producing -hydroxy ethers by oxidizing C=C unsaturated compounds with hydroperoxides A single-stage method for producing -hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with ... | 08/19/2003 |
| 6458837 | Lipophilic diesters of chelating agents The invention discloses stable diesters of chelating agents of divalent metal ions, processes for their preparation and pharmaceutical compositions thereof. Most preferred compounds according to the present invention are stable lipophilic diesters compris... | 10/01/2002 |
| 6437025 | Poly(ethylene glycol) derivatives with proximal reactive groups An activated, substantially water soluble poly(ethylene glycol) is provided having of a linear or branched poly(ethylene glycol) backbone and at least one terminus linked to the backbone through a hydrolytically stable linkage, wherein the terminus is bra... | 08/20/2002 |
| 6380439 | Single-stage method for producing -hydroxy ethers by oxidizing C=C-unsaturated compounds with hydroperoxides A single-stage method for producing -hydroxy ethers by oxidizing olefinic substrates with organic hydroperoxides and opening the resultant oxirane ring by means of monovalent or polyvalent alcohols wherein a molybdenum compound in combination with ... | 04/30/2002 |
| 6372927 | Process for preparing alkylene oxide adducts The process for preparing an alkylene oxide adduct, including the steps of feeding an organic compound having active hydrogen and an alkylene oxide to a reaction column packed with a solid catalyst, and carrying out addition reaction of the organic compou... | 04/16/2002 |
| 6362254 | Poly(ethylene glycol) derivatives with proximal reactive groups An activated, substantially water soluble poly(ethylene glycol) is provided having of a linear or branched poly(ethylene glycol) backbone and at least one terminus linked to the backbone through a hydrolytically stable linkage, wherein the terminus is bra... | 03/26/2002 |
| 6191315 | Haze free polyether polyol compositions and a method for their preparation Most generally, the invention provides a method for making a neutralized polyether polyol, comprising the steps of a) Polymerizing one or more alkylene oxides in the presence of an alkaline catalyst to form a polyalkylene oxide intermediate; and b) Neutralizin... | 02/20/2001 |
| 6133211 | Block copolymers, their preparation and their use as lubricants Block copolyethers having general formula (I): RX--(CH2 --CHR1 --O--)x --(--CH2 CHR2 --O--)y --(--CH2 --CHR3 --O--)z --R4 wherein: R is selected from H, al... | 10/17/2000 |
| 6037496 | 3-{N-[2-(N',N'-dimethylamino ethoxy)ethyl]-N-methylamino}propionamide for the production of polyurethanes 3-{N-[2-(N',N'-dimethylamino ethoxy)ethyl]-N-methylamino}propionamide is a new compound which is useful as a catalyst in the production of polyurethane foams.... | 03/14/2000 |
| 6037455 | Propoxyphene derivatives and protein and polypeptide propoxyphene derivative conjugates and labels The present invention is directed to novel propoxyphene derivatives which are synthesized for the covalent attachment to antigens (proteins or polypeptides) for the preparation of antibodies or receptors to propoxyphene and propoxyphene metabolites. The r... | 03/14/2000 |
| 5871675 | Crosslinked tinted polymers The invention relates to a novel process for the production of tinted mouldings, in particular tinted contact lenses, in which a crosslinkable tinted polymer comprising units containing a crosslinkable group and units containing a reactive dye radical is ... | 02/16/1999 |
| 5869715 | Polyfunctional cationic cytofectins For use in transporting biologically active species into and through membrane barriers, a cationic amine compound is utilized that has the general structure: ##STR1## wherein R4 and R5 are a pair of same or different lipoyl ... | 02/09/1999 |
| 5801260 | Carbonothioate phospholipid analogs as substrate of phospholipases and lipases Novel substrates of phospholipases, lysophospholipases and lipases are disclosed.... | 09/01/1998 |
| 5708092 | Functionalized chain extended initiators for anionic polymerization A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Qn --Z--OA(R1 R2 R3) wherein M is defined as an alkali metal, selected from the group consis... | 01/13/1998 |
| 5616745 | Lipopolyamines, their preparation and their use New lipopolyamines of general formula (I), their salts, their preparation and their use. ##STR1## n=1 to 5 and m=2 to 6 R represents a radical ##STR2## (R1 and R2 : aliphatic radical containing 12 to 22 carbon atoms; R... | 04/01/1997 |
| 5491261 | Poly-perfluoroalkyl-substituted alcohols and acids, and derivatives thereof Di-, tri- and poly-perfluoroalkyl-substituted alcohols and acids and derivatives thereof are described which are prepared from perfluoroalkyl iodides and di-, tri- or polyallyl alcohols or acids. These compounds contain two or more perfluoroalkyl-iodoalky... | 02/13/1996 |
| 5468841 | Polymerization of energetic, cyclic ether monomers using boron trifluoride tetrahydrofuranate The present invention provides an improved method of carrying out cationic polymerization of cyclic ether monomers substituted with high-energy, electron-withdrawing pendant groups (e.g., BAMO and NMMO). Such cyclic ether monomers are polymerized with an ... | 11/21/1995 |
| 5380777 | Polyglycidyl nitrate plasticizers This invention is first, a difunctional poly(glycidyl nitrate) oligomer (PGN oligomer), second, nitrated PGN oligomer and third, the use of the nitrated PGN oligomer as a plasticizer, particularly as a plasticizer for binders used in and/or as energetic f... | 01/10/1995 |
| 5326829 | Process for the production of activated polyethers Disclosed herein is a method of preparing an activated polyether polyol by reacting an aminoalcohol with a polyether terminated with a leaving group.... | 07/05/1994 |
| 5290912 | Process for producing a polyoxyalkylene compound The present invention has an object of producing a polyoxyalkylene compound by ring-opening polymerization of an alkylene oxide to a certain specific highly hydrophobic initiator. The present invention provides a process for producing a polyoxyalkylene co... | 03/01/1994 |
| 5258544 | Synthesis of aldehydes useful in the preparations of HMG-CoA reductase inhibitors Disclosed is a process for the preparation of 2-aryl-1-cyclohexene-1-carboxaldehydes from 1-arylcyclohexenes which are intermediates for trans-6-[(2-arylsubstituted cycloalkenyl and substituted cycloalkyl)alkenyl and alkyl]-3,4,5,6-tetrahydro-2H-pyran-2-o... | 11/02/1993 |
| 5017718 | Process for preparing polyfluoroalkyl-substituted compounds A process for preparing a perfluoroalkyl-substituted compound is disclosed. The process comprises reacting a halopolyfluoroalkane having 1 to 20 carbon atoms with a compound selected from the group consisting of (1) a substituted or unsubstituted ethylene... | 05/21/1991 |
| 4855508 | Energetic diethers and process for their preparation The invention comprises a novel preparation of energetically substituted diether compounds and novel diether compounds not previously reported. In one embodiment certain isomeric forms of dibromoalkanes are converted to corresponding isomers of bromoalkyl... | 08/08/1989 |
| 4745208 | 2,2,2-trinitroethyl 2-nitroxyethyl ether and a method of preparation 2,2,2-trinitroethyl 2-nitroxyethyl ether (TNEN), C(NO2)3 CH2 CH2 CH2 ONO2, which is prepared by the following reaction sequence: 2,2,2-trinitroethyl 2-nitroxyethyl ether is useful an an energetic... | 05/17/1988 |
| 4727199 | Heterogeneous alkoxylation using anion-bound metal oxides Active-hydrogen compounds, for example, primary and secondary alcohols or diols, are alkoxylated, for example, ethoxylated, using solid anion-bound metal oxide catalysts, such as, zirconium oxysulfate catalyst. Hydrous zicronium oxide is treated with solu... | 02/23/1988 |
| 4594430 | Synthesis of geminal dinitro compounds Geminal dinitro compounds are prepared by reacting an organic nitro compound having a replaceable hydrogen on the carbon to which the nitro group is attached with a source of nitrite ions in the presence of an oxidizing agent and a catalytic amount of an ... | 06/10/1986 |
| 4433179 | Process for the preparation of di- and poly-allyl ethers A process for the preparation of allyl ethers of the formula in which R and n are as defined in claim 1, by reacting hydroxy compounds of the formula with allyl chloride or allyl bromide by phase transfer catalysis, 0.8 to 5 mols of allyl chloride or allyl bro... | 02/21/1984 |
| 4426540 | Synthesis of vinyl ethers Vinyl ethers are prepared by reacting divinyl ether with a primary alcohol in the presence of a catalytic amount of red mercuric oxide and trifluoroacetic acid. The vinyl ethers so produced are particularly useful as monomers which can be polymerized into... | 01/17/1984 |
| 4424398 | Process for preparation of energetic plasticizers A process for synthesizing energetic ethers, esters and acetals is disclosed that comprises reacting certain alcohols with certain alkenes or alkynes in the presence of mercuric or mercurous sulfate. The products obtained are particularly useful as plasti... | 01/03/1984 |
| 4341712 | Fluorodinitro compounds Fluorodinitro compounds are proposed as new compositions of matter which are useful as energetic ingredients for propellant and explosive formulations.... | 07/27/1982 |
| 4282387 | Process for preparing polyols The invention describes an improved process for preparing polyols by reacting a mono-epoxy compound such as propylene oxide with a hydroxyl-containing initiator compound such as glycerine in the presence of a catalyst, the improvement being that the catal... | 08/04/1981 |
| 3931257 | Polyene compounds Novel 9-substituted phenyl- or cyclohex-1-en-1-yl-3,7-dimethyl-nona-2,4,6-trienoic acids or derivatives thereof, -trienal or -trienol derivatives are described. The subject compounds are useful in the treatment of certain dermatoses and inflammatory ... | 01/06/1976 |