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| Number | Title | Issue Date |
| 6710085 | Methods for enhancing plant growth using diacyl ureas The present invention is directed to new compositions of matter comprising the reaction products of a carboxylic acid and a urea having the formula: where R1, R2, R3 and R4 are... | 03/23/2004 |
| 6284921 | Method for preparing a fertilizer An oligomethylene urea product usable as a fertilizer can be more efficiently prepared in several steps by: a) introducing at least urea and an aqueous solution of formaldehyde in the overall molar ratio of urea to formaldehyde of the step 1:1-2:1 into a ... | 09/04/2001 |
| 6084129 | Process for reducing the residual free ammonia emissions from an urea production plant A process for reducing the residual free ammonia emissions from an urea production plant comprises the step of feeding a gas flow comprising carbon dioxide (8) to a melt urea flow (3) coming from the concentration section (13) of the plant.... | 07/04/2000 |
| 6040273 | Diformylurea and reaction products of urea and carboxylic acids The present invention is directed to new compositions of matter comprising the reaction products of a carboxylic acid and a urea having the formula ##STR1## where R1, R2, R3 and R4 are the same or different and ... | 03/21/2000 |
| 5763364 | Thixotropic aqueous plant protection agent suspensions The invention relates to thixotropic aqueous suspension concentrates of plant protection agents. The invention furthermore relates to the use of these agents in plant protection and the use of saponites as auxiliaries in the preparation of plant protectio... | 06/09/1998 |
| 5716591 | Process for producing calcium nitrate-urea adduct Calcium nitrate-urea adduct, a product having the formula Ca(NO3)2.4CO(NH2)2 !, is obtained by means of a process which basically consists of the following steps: mixing molten urea and calcium nitrate; feeding the... | 02/10/1998 |
| 5686647 | Process for the preparation of urea Process for the preparation of urea, wherein in a first step ammonia and carbon dioxide react in suitable conditions so as to form a first mixture containing a quantity of urea, wherein in one or more subsequent steps ammonia and carbon dioxide are remove... | 11/11/1997 |
| 5635447 | Polyorganic acids and their analogues to enhance herbicide effectiveness A herbicide composition which comprises a herbicide and a small but herbicide absorption enhancing effective amount of a water soluble, non-aromatic polyorganic acid or a salt or copolymer thereof such as polyaspartic acid.... | 06/03/1997 |
| 5628810 | Method and composition for increasing the protein content of grains The present invention describes a protein guarantor composition and its application, in particular to improving the protein content of cereals. The protein guarantor composition containing urea as nitrogen source and incorporating deacylated chitin proves... | 05/13/1997 |
| 5527961 | Process for reducing the ammonia content of a gaseous effluent from urea production plants A process for neutralizing the ammonia present in the molten urea originating from the concentration section of a plant for its production, comprising adding to the molten urea a small quantity of an acid.... | 06/18/1996 |
| 5374608 | Compositions containing adducts and surfactants Compositions containing one or more surfactants in combination with sulfuric acid and one or more of certain chalcogen-containing compounds in which the chalcogen compound/H2 SO4 molar ratio is below 2. These compositions contain the... | 12/20/1994 |
| 5149355 | Adduct compositions Compositions containing sulfuric acid and one or more of certain chalcogen-containing compounds in which the chalcogen compound/H2 SO4 molar ratio is below 2 contain the mono-adduct of sulfuric acid which is catalytically active for ... | 09/22/1992 |
| 5055127 | Vegetation control with monourea sulfuric acid Methods for controlling vegetation are disclosed which involve contacting the foliage of the vegetation with an aqueous solution containing urea and sulfuric acid. The molar ratio of urea to sulfuric acid preferably is within the range of about 1/4 to abo... | 10/08/1991 |
| 5035737 | Herbicide compositions Certain urea-sulfuric acid components, comprised of urea and sulfuric acid in a 1/4 to 7/4 molar ratio, contain a monourea adduct of sulfuric acid, which is catalytically active for promoting organic chemical reactions. The invention provides methods empl... | 07/30/1991 |
| 5034046 | Method for controlling vegetation Methods for controlling vegetation are disclosed which involve contacting the foliage of the vegetation with an aqueous solution containing urea and sulfuric acid. The molar ratio of urea to sulfuric acid preferably is within the range of about 1/4 to abo... | 07/23/1991 |
| 4976775 | Plant male sterilant A plant male sterilant which comprises as an active ingredient an effective amount of a threonine derivative having the formula (I): ##STR1## where R1 is a C1 to C2 alkyl group; R2 is a hydrogen atom, a C | 12/11/1990 |
| 4966620 | Methods for facilitating the harvest of food crops Methods are provided for facilitating the harvest of food crops by applying to the crop foliage an amount of an aqueous solution containing a combination of urea and sulfuric acid in which the urea/H2 SO4 molar ratio is within the ra... | 10/30/1990 |
| 4935048 | Cellulosic compositions and methods for treating cellulosic materials Cellulosic materials are physically and/or chemically modified by contact with a combination of urea and sulfuric acid in which at least 25 percent of the sulfuric acid is present as the monourea adduct of sulfuric acid. The cellulosic materials thus trea... | 06/19/1990 |
| 4931061 | Plant seed compositions Plant seeds are beneficiated by contacting them with an aqueous solution of a urea-sulfuric acid component containing the monourea adduct of sulfuric acid. The molar ratio of urea to sulfuric acid in the aqueous solution is preferably within the range of ... | 06/05/1990 |
| 4931079 | Scarifying plant seeds Plant seeds are beneficiated by contacting them with an aqueous solution of a urea-sulfuric acid component containing the monourea adduct of sulfuric acid. The molar ratio of urea to sulfuric acid in the aqueous solution is preferably within the range of ... | 06/05/1990 |
| 4923894 | Polymeric microparticles having pesticidal activity Polymeric microparticles having bound therewith a pesticide are disclosed. The microparticles are prepared by polymerizing a mixture of ethylenically unsaturated monomers. Active substances may be bound to the microparticles by introducing an ethylenicall... | 05/08/1990 |
| 4872902 | Cyclohexanediones and their use as plant growth regulators The invention relates to the novel cyclohexanediones of formula I ##STR1## in which R is hydrogen or C1 -C6 -alkyl, A is R2, OR3 or NR3 R4, R2 is C1 -C6 -alkyl t... | 10/10/1989 |
| 4834788 | Plant seed compositions and methods for treating plant seeds Plant seeds are beneficiated by contacting them with an aqueous solution of a urea-sulfuric acid component containing the monourea adduct of sulfuric acid. The molar ratio of urea to sulfuric acid in the aqueous solution is preferably within the range of ... | 05/30/1989 |
| 4818269 | Cellulosic compositions and methods for treating cellulosic materials Cellulosic materials are physically and/or chemically modified by contact with a combination of urea and sulfuric acid in which at least 25 percent of the sulfuric acid is present as the monourea adduct of sulfuric acid. The cellulosic materials thus trea... | 04/04/1989 |
| 4714493 | Isothiourea herbicidal composition This invention relates to the herbicide N,N'-(N''-isopropylcarbamyl,N'''-isopropylcarbamyl)-S-ethylisothiourea, its use and process for making the same.... | 12/22/1987 |
| 4405355 | N-Alkyl or alkoxy-N'-substituted hydrocarbyl urea Compounds of the formula ##STR1## wherein R is aliphatic hydrocarbyl, alicyclic hydrocarbyl or aryl suitably substituted, if desired, or a heterocyclic group, R1 is hydrogen or alkyl, R2 is alkyl or alkoxy, R3 is ... | 09/20/1983 |
| 4297130 | Method for increasing the number of pods in legumes by foliar feeding Method for the foliar feeding of leguminous plants wherein a nonburning nitrogenous plant food is applied to the foliage of the plant at a critical life-cycle period to increase substantially the quantity and to enhance the quality of seeds produced there... | 10/27/1981 |
| 4239526 | Substituted ureas as sugarcane ripeners Sucrose yield of sugarcane is increased by treating the cane crop a few weeks prior to harvest with a ripening agent comprising a substituted urea.... | 12/16/1980 |
| 4200450 | N-Alkyl or alkoxy-N'-substituted hydrocarbyl urea Compounds of the formula ##STR1## wherein R is aliphatic hydrocarbyl, alicyclic hydrocarbyl or aryl suitably substituted, if desired, or a heterocyclic group, R1 is hydrogen or alkyl, R2 is alkyl or alkoxy, R3 is ... | 04/29/1980 |
| 4066440 | Symmetrical alkynyl ureas Disclosed are symmetrical alkynyl ureas, such as N,N'-bis-(3-methyl-1-butyn-3-yl)urea, their manufacture by the reaction of a chloroformate such as beta-fluoroethyl chloroformate with alkynes such as 3-amino-3-methyl-1-butyne, and their use to control cer... | 01/03/1978 |
| 4013446 | Method for preventing creasing in citrus fruit The invention relates to a method for a significant reduction of creasing in citrus fruit. The method consists in applying an aqueous solution of urea phosphate to the citrus fruit. The urea phosphate can be applied alone or together with other convention... | 03/22/1977 |
| 4008071 | Adducts of carbamoyl sulphoxides Novel adducts of a carbamoyl sulphoxide and urea having the formula ##STR1## and adducts of the said carbamoyl sulphoxide and an organic compound having the grouping ##STR2## wherein R is substituted or unsubstituted aryl, alkyl or alkenyl; R | 02/15/1977 |
| 3989500 | Method of regulating plant growth A method of improving the yield of plants, particularly crop plants, such as legumes and cotton, by the application to the plants of an effective amount of at least one compound selected from the group consisting of substituted thioureas having the formul... | 11/02/1976 |
| 3975180 | Crystalline adducts of carbamoyl sulphoxides and urea in a 1:3 ratio Novel crystalline adducts of a carbamoyl sulphoxide and urea have the formula ##EQU1## wherein R is substituted or unsubstituted aryl, alkyl or alkenyl; R1 and R2, which may be the same or different, are H, substituted or u... | 08/17/1976 |
