Did You Know...
...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
PatentStorm News
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 |
| 8173845 | Process for producing 3-methylthiopropanal A process is provided capable of producing 3-methylthiopropanal with subgeneration of high-boiling impurities being favorably inhibited. The process for producing 3-methylthiopropanal, includes reacting acrolein with methylmercaptan in the presence of a triallylamin... | 05/08/2012 |
| 8101803 | Process for the addition of thiolates to α,β-unsaturated carbonyl or sulfonyl compounds Alkylthio substituted aldehydes, ketones, esters and sulfones are prepared by reacting α,β-unsaturated carbonyl and sulfonyl compounds with a sodium or potassium thiolate in the presence of a alkane carboxylic acid and water. ... | 01/24/2012 |
| 7799953 | Method for producing 3-methylthiopropanal A 3-methylthiopropanal is produced by a method comprising the step of supplying an acrolein and a methyl mercaptan together or sequentially with an acidic compound and a basic compound into a reaction system to react the acrolein with the methyl mercaptan, wherein t... | 09/21/2010 |
| 7476767 | Alpha-hydroxy sulfonate aldehydes, germicidal compositions containing the alpha-hydroxy sulfonate aldehydes, or mixtures of alpha-hydroxy sulfonate aldehydes and phthalaldehydes, and methods of using the compounds or compositions for disinfection or sterilization Disclosed herein are α-Hydroxy sulfonate aldehydes and synthesis methods therefor. Germicidal compositions including the α-hydroxy sulfonate aldehydes, are also disclosed. In one aspect, a germicidal composition may include a diluent, and a germicidally effective ... | 01/13/2009 |
| 7402705 | Production of 3- (alkylthio) propanal The invention relates to a process for the production of 3-(alkylthio)propanal from glycerol using catalysts. ... | 07/22/2008 |
| 7256315 | Process for the production of 3-methylthiopropanal Process for the Production of 3-methylthiopropanal. A process for the production of 3-methylthiopropanal which reacting reaction medium comprising methyl mercaptan and acrolein in the presence of a catalyst comprising an organic base characterised in that the organi... | 08/14/2007 |
| 7241925 | Method for producing halogen-substituted aromatic aldehyde In the production method of the invention, a halogen-substituted aromatic compound is reacted with carbon monoxide in the presence of hydrogen fluoride and boron trifluoride into a corresponding halogen-substituted aromatic aldehyde. By the use of hydrogen fluoride ... | 07/10/2007 |
| 7199270 | Method for the separation of methyl mercaptan from reaction gas mixtures The invention relates to a method for the separation of methyl mercaptan from reaction gas mixtures obtained by means of the catalytic conversion of H2S with methanol, by means of converting the methyl mercaptan into MMP in the presence of the byproducts with acrole... | 04/03/2007 |
| 7144557 | Multitube reactor, vapor phase catalytic oxidation method using the multitube reactor, and start up method applied to the multitube reactor A multitube reactor, wherein tubes having smaller tolerance between a nominal size and actual sizes are used as reaction tubes to stably perform a high yield reaction for a long period, a catalyst is filled into the reaction tubes so that the catalyst layer peak tem... | 12/05/2006 |
| 7119233 | Method for preparing 3-(methylthio)propanal A method for preparing 3-(methylthio)propanal and 2-hydroxy-4-(methylthio)butanenitrile by catalyzed addition of methylmercaptan to acrolein and hydrogen cyanide to 3-(methylthio)propanal. ... | 10/10/2006 |
| 7049472 | Bis(3-alkoxyalkan-2-OL) sulfides, sulfones, and sulfoxides: new surface active agents Compositions containing surfactant compounds according to formula (I) ROCH2CH(OH)CR1R2ZCR1R2CH(OH)CH2OR, (I) wherein Z is S, SO, or SO2, can have a range of equilib... | 05/23/2006 |
| 6924391 | Alpha-amino,-thio,-oxo substituted ketones as phospholipase inhibitors Inhibitors of the cytosolic phospholypase A2 enzymes are provided which are of use in controlling a wide variety of inflammatory diseases. The inhibitors of the present invention have the general formula wherein X, Z, ... | 08/02/2005 |
| 6903239 | Fluorinated benzaldehydes The present invention relates to fluorinated benzaldehydes, to a process for preparing them and also to the use of the fluorinated benzaldehydes for preparing active ingredients, especially in medicaments and agrochemicals. ... | 06/07/2005 |
| 6713524 | Reactive polymers The invention relates to novel reactive polymers of formula wherein the variables are as defined in the claims. The polymers of the invention are useful for the modification of material surfaces and are particularly suit... | 03/30/2004 |
| 6630578 | Thioether derivatives, their method for production and use Novel dendritic molecules are provided which respond immediately by emission of light when stimulated with light or electric energy, and are useful, for example, as switching material of memory. The dendritic molecules have a core, a branch structure comp... | 10/07/2003 |
| 6465694 | Method for preparation of polyethylene glycol aldehyde derivatives Aldehyde derivatives of polyethylene glycols and methods of making thereof are disclosed. These aldehyde derivatives can be used to make polyethylene glycol-hydrazines, polyethylene glycol-thiols, polyethylene glycol amines, and branched polyethylene glyc... | 10/15/2002 |
| 6379590 | Method for making unsymmetrically substituted fluorenyl compounds for nonlinear optical applications A new method for producing unsymmetrically substituted fluorenyl compounds, one step of which is the preparation of 2,7-disubstituted fluoren-9-one derivatives via the nucleophilic substitution of a compound of the formula D ##STR1## wherein A' is se... | 04/30/2002 |
| 6326519 | Diallylic sulfides and processes for preparing the same Diallylic sulfides represented by Formula I ##STR1## wherein: R1 and R2 are independently chosen from the group consisting of --CHO, --CH2 Cl, --CH2 Br, --CH2 I, --CH2 OH, CH2 OS... | 12/04/2001 |
| 6225505 | Trifluoro methylthiomethyl benzene derivatives and process for production same The present invention lies in a process for producing a trifluoromethylthiomethylbenzene derivative represented by the following general formula (2): ##STR1## (wherein R is a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkoxyca... | 05/01/2001 |
| 6187963 | Processes for the manufacture of acrolein derivatives Processes are disclosed for the conversion of propylene to an acrolein derivative by converting propylene to acrolein and converting acrolein to the acrolein derivative. The processes utilize oxygen and recycle propane to the acrolein reactor. Process fee... | 02/13/2001 |
| 6121496 | Aromatic thioether acylation method The present invention relates to a process for the acylation of an aromatic thioether. In its preferred variant, the invention resides in a process for the condensation of acetic anhydride or acetyl chloride with thioanisole. The process for the acylation... | 09/19/2000 |
| 6057481 | Processes for the manufacture of methylmercaptopropanal Processes are disclosed for the conversion of propylene to methylmercaptopropanal by converting propylene to acrolein and converting acrolein to methylmercaptopropanal. The processes utilize oxygen and recycle propane to the acrolein reactor. Process feed... | 05/02/2000 |
| 6031138 | Process for the preparation of 3-(methylthio) propanal A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium contains 3-(methylthio)propanal, methyl mercaptan and a catalys... | 02/29/2000 |
| 6025526 | Synthesis of substituted mercapto-benzaldehydes Disclosed is a composition of (1) a substituted benzaldehyde having the general formula ##STR1## where X is a leaving group in the ortho or para position, (2) a mercaptide having the general formula MSR' in an amount about stoichiometric to about ... | 02/15/2000 |
| 5973200 | Process for the preparation of 2-hydroxy-4-(methylthio) butanoic acid or methionine by mercaptan addition A process for the free-radical addition of a mercaptan to a nonconjugated olefinic substrate having a terminal carbon-carbon double bond is disclosed. 2-Hydroxy-4-(ethylthio)butanoic acid (HMBA) or methionine can be prepared using this method. The nonconj... | 10/26/1999 |
| 5952386 | Dihalopropene compounds, insecticides containing them as active ingredients, and intermediates for their production The present invention provides dihalopropene compounds of the general formula: ##STR1## wherein R1 is C1 -C10 alkyl or the like; L is C(.dbd.O)NH or the like; R2, R3 and R4 are indepen... | 09/14/1999 |
| 5948936 | Method for production of sulfide group-containing thiol compound A method for the production of a sulfide group-containing thiol compound which comprises causing alkylene sulfide to react with a thiol compound in the presence of at least one basic catalyst selected from the group consisting of basic ion-exchange resins... | 09/07/1999 |
| 5925794 | Process for the preparation of 3-(methylthio)propanal A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium contains 3-(methylthio)propanal, methyl mercaptan and a catalys... | 07/20/1999 |
| 5919985 | Method for production of sulfide group-containing thiol compound An object is to provide a method for the production of a sulfide group-containing thiol compound which comprises using a solvent capable of effecting the ring-opening addition reaction of an alkylene sulfide to a thiol compound without inducing the alkyle... | 07/06/1999 |
| 5912388 | Preparation of aldehydes or ketones from alcohols A process for preparing an aldehyde or ketone comprising reacting a primary or secondary alcohol with oxygen in the presence of a base, a catalytic amount of a copper salt and a suitable lignad under anhydrous conditions.... | 06/15/1999 |
| 5905171 | Process for the preparation of 3-(methylthio)propanal A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium contains 3-(methylthio)propanal, methyl mercaptan and a catalys... | 05/18/1999 |
| 5897750 | Separation of acetone from isopropanol-water mixtures by extractive distillation Acetone cannot be separated from a mixture of isopropanol and water because of the closeness of their boiling points. Acetone can be easily separated from isopropanol and water by extractive distillation. Effective extractive agents are 1-nitropropane, 3-... | 04/27/1999 |
| 5866596 | 3,4-diaryloxazolone derivatives, their methods of preparation and their uses in therapeutics The present invention relates to the derivatives of formula: ##STR1## and to their use in therapeutics, especially as drugs with anti-inflammatory and analgesic properties.... | 02/02/1999 |
| 5808164 | Process for producing aromatic sulfides A process which can be used to produce an aromatic sulfide compound having the formula of (R4-n)(Xn)(W)Ar--S--R' is provided. The process comprises contacting, in the presence of a surfactant, a halo-substituted aromatic compound in ... | 09/15/1998 |
| 5744647 | Process for the preparation of 3-(methylthio) propanal A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium contains 3-(methylthio)propanal, methyl mercaptan and a catalys... | 04/28/1998 |
| 5663409 | Process for the preparation of 3-(methylthio) propanal and 2-hydroxy-4-(methylthio) butanenitrile Catalytic processes for the preparation of 3-(methylthio)propanal and 2-hydroxy-4-(methylthio)butanenitrile using novel addition catalysts are disclosed. The novel addition catalysts include: nicotinamide, imidazole, benzimidazole, 2-fluoropyridine, poly-... | 09/02/1997 |
| 5637766 | Process for the preparation of 3-(methylthio) propanal A process for the continuous preparation of 3-(methylthio)propanal. A liquid reaction medium is contacted with a gaseous acrolein feed stream in a gas/liquid contact zone. The reaction medium contains 3-(methylthio)propanal, methyl mercaptan and a catalys... | 06/10/1997 |
| 5618981 | Process for producing aromatic sulfides A process which can be used to produce an aromatic sulfide compound having the formula of (R4-n)(Xn)(W)Ar--S--R' is provided. The process comprises contacting, in the presence of a surfactant, a halo-substituted aromatic compound in ... | 04/08/1997 |
| 5610198 | Anti-mycobacterial compositions and their use for the treatment of tuberculosis and related diseases Compounds, pharmaceutical compositions, and methods for the treatment of mycobacterial diseases, such as tuberculosis and leprosy, are provided. Use of the compounds for promoting an antiseptic condition of a surface are also included. Some of the preferr... | 03/11/1997 |
| 5534557 | Onium salt, photopolymerization initiator, energy ray-curing composition containing the initiator, and cured product The composition of the present invention is excellent in compatibility, transparency and curability and give a cured coat of excellent gloss and of less smell, and cured products of excellent properties can be obtained by curing the composition. The prese... | 07/09/1996 |
