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 |
| 7119081 | Oestrogen-17-sulphamates as inhibitors of steroid sulphatase There is provided a compound of Formula I wherein X is a ring system; R1 is any one of a sulphamate group, a phosphonate group, a thiophosphonate group, a sulphonate group or a sulphonamide group; R | 10/10/2006 |
| 6812358 | Process for making estra-4,9(10)-diene steroids A novel process for making estra-4,9(10)-diene-3,17-dione steroids from readily available 19-nor-androst-4-ene-3-one steroids by a straightforward three-step process. Products of this process are important intermediates in the preparation of biologically active subs... | 11/02/2004 |
| 6767903 | New7α, 17α-bis-alkylated testosterone derivatives and their use in long-term therapy of androgen-dependent diseases The invention relates to new 7α, 17α, 17β-substituted testosterone derivatives of general formula (I) and their use as pure antiandrogens for the long-term therapy of androgen-dependent diseases, notably for the long-term antiandrogen therapy of prostate carcinom... | 07/27/2004 |
| 6610866 | Stereoselective synthesis of 24-hydroxylated compounds useful for the preparation of aminosterols, vitamin D analogs, and other compounds A method is described for stereoselectively reducing an unsaturated alkyl ketone substituent attached to a fused ring base. In this method, the unsaturated alkyl ketone reacts with a chiral oxazaborolidine reagent. This reaction stereoselectively reduces ... | 08/26/2003 |
| 6596885 | 19-Nor steroids having a thiocarbonated chain in position 11beta, their preparation process and the intermediates of this process, their use as medicaments and compositions Novel compounds having a formula selected from the group consisting of ##STR1## wherein the substituents are defined as in the specification which are intermediates for the production of vinyl compounds having a remarkable anti-estrogenic and anti-prolife... | 07/22/2003 |
| 6534490 | Unsaturated 14, 15-cyclopropanoandrostanes, method for the production thereof and pharmaceutical preparations containing said compounds Described are new, unsaturated 14,15-cyclopropano-androstanes of general formula (I) and their pharmaceutically acceptable salts, a process for their production and pharmaceutical preparations that contain these compounds. The compounds are characterized ... | 03/18/2003 |
| 6476012 | Estradiol-16-carboxylic acid esters as locally active estrogens The present invention relates to analogs of estradiol, which, in their most preferred embodiment, act as locally active estrogens without significant systemic action. A series of 16-carboxylic acid substituted steroids and their esters is presented... | 11/05/2002 |
| 6462211 | 4-halogenated steroids, their preparation process and intermediates, their use as medicaments and the pharmaceutical compositions containing them A subject of the invention is the compounds of formula (I): ##STR1## in which X is a halogen atom, D represents the remainder of an optionally substituted pentagonal or hexagonal ring and optionally carrying an unsaturation, R1, R2, ... | 10/08/2002 |
| 6437158 | Testosterone derivative The invention is drawn to (7a, 17b)-7-methyl-17-(1-oxoundecyl)oxy-estr-4-en-3-one, (MENT undecanoate), their pharmaceutical formulation and method of use is described. Unexpected results of the said compound compared with testosterone undecanoate is ... | 08/20/2002 |
| 6433200 | Intermediates for preparation of 16-ene-vitamin D derivatives Intermediates for the preparation of a vitamin D derivative have the following formulas: ##STR1## wherein R9 and R10 may be the same or different and each represents a hydrogen atom or a protecting group, and in Formula (5) the ... | 08/13/2002 |
| 6388109 | 14,15-cyclopropano steroids of the 19-norandrostane series, method for the production thereof and pharmaceutical preparations containing said compounds Described are new 14,15-cyclopropano steroids of the 19-norandrostane series of general formula (I) and their pharmaceutically acceptable salts, a process for their production and pharmaceutical preparations that contain these compounds. The compounds are... | 05/14/2002 |
| 6326503 | 16-ENE-vitamin D derivatives A compound having the formula (4): wherein ##STR1## X is oxygen or sulfur, R9 and R10 are each a hydrogen or a protecting group, and R11 is an aliphatic hydrocarbon, a --COR12 group where R12 is alkyl... | 12/04/2001 |
| 6110906 | Androgen derivatives for use in the inhibition of sex steroid activity Methods for treating sex steroid-dependent diseases by inhibiting sex steroid activity include administration of novel compounds which include an androgenic nucleus substituted at a ring carbon with at least one substituent specified herein. Such compound... | 08/29/2000 |
| 5994568 | Estrenes for inducing hypothalamic effects The invention relates to estrene steroids, which bind to neuroepithelial receptors. The steroid is preferably administered in the form of a pharmaceutical composition containing one or more pharmaceutically acceptable carriers.... | 11/30/1999 |
| 5986115 | 7-(.xi.-aminoalkyl)-estratrienes, process for their production, pharmaceutical preparations which contain these 7-(.xi.-aminoalkyl)-estratrienes as well as their use for the production of pharmaceutical agents This invention describes new, substituted 7-(.xi.-aminoalkyl)-estratrienes of general formula I ##STR1## in which side chain SK is a radical of partial formula ##STR2## as well as their physiologically compatible addition salts with organ... | 11/16/1999 |
| 5763426 | Crystalline form of a vitamin D analogue The present invention relates to calcipotriol hydrate--a new crystalline form of calcipotriol--with superior technical properties and with superior stability.... | 06/09/1998 |
| 5739302 | Manufacture and use of novel glycosides of catechol estrogens There are described novel glycosides of catechol estrogen, a method of preparing the same, and a medicament comprising one of the glycosides as an active ingredient. The glycosides are shown by the formula of ##STR1## wherein X is carbonyl group or ... | 04/14/1998 |
| 5429934 | Process for the production of 20-methyl-5,7-pregnadiene-3ଲ,21-diol derivatives using mycobacterium 20 -Methyl-5,7-pregnadiene-3ଲ,21-diol derivatives of general formula I ##STR1## in which R1 means a hydrogen atom or a lower alkyl group and R2 means a lower alkyl group or R1 and R2 together represent a tetram... | 07/04/1995 |
| 5405944 | Glycosides of catechol estrogens There are described novel glycosides of catechol estrogen, a method of preparing the same, and a medicament comprising one of the glycosides as an active ingredient. The glycosides are shown by the formula of ##STR1## wherein X is carbonyl group or ... | 04/11/1995 |
| 5364847 | Inhibitors of sex steroid biosynthesis and methods for their production and use Certain steroidal and non-steroidal compounds have been found to inhibit androgen and estrogen formation. Such inhibition may aid in the reduction of the activity of these hormones and may be useful in the treatment of diseases where, for example, inhibit... | 11/15/1994 |
| 5208263 | Anti-androgen compounds Disclosed are novel classes of anti-androgen including dihydrophenanthrene derivatives, their method of synthesis and their use in treating disorders associated with excessive androgenic activities.... | 05/04/1993 |
| 5182381 | Intermediates for 3-keto-19-nor-Ɗ4,9 -steroids Novel 3-keto-19-nor-Ɗ4,9 -steroids of the formula ##STR1## and their non-toxic, pharmaceutically acceptable acid addition salts possessing a remarkable antiglucocorticoidal activity.... | 01/26/1993 |
| 5132299 | 11ଲ-phenyl-4,9,15-estratrienes, their manufacture and pharmaceutical preparations containing same New 11ଲ phenyl-4,9,15-estratrienes of formula I ##STR1## are described, where X implies an oxygen atom or a hydroxyimino grouping N~OH, R1 stands for a hydrogen atom or a methyl group, R2 implies a hydrogen atom, an alkyl radic... | 07/21/1992 |
| 5086190 | Method of fluorinating by using N-fluoropyridinium pyridine heptafluorodiborate The present invention provides a novel compound represented as ##STR1## The present novel compound is prepared by reacting fluorine with pyridine-boron trifluoride and is useful as a fluorinating agent in the fluorination of organic compounds.... | 02/04/1992 |
| 4885117 | Process for the preparation of (Z)-17-halovinyl steroids (Z)-17-halovinyl steroids of general Formula I ##STR1## wherein . . . . is a single bond or a double bond, V is a carbon-to-carbon bond or a methylene group, R1 is a hydrogen atom or a methyl group, X is a chlorine atom, a bromine atom or an ... | 12/05/1989 |