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Class Information
Number: 71/902
Name: Chemistry: fertilizers > Nitrification inhibition
Description: Art collection involving the prevention of the nitrification or denitrification activity of growth media bacteria.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6488734 |
Nitrification inhibitors, and the use of polyacids which contain a nitrification inhibitor for the treatment of inorganic fertilizers |
Dec. 3, 2002 |
| 6336949 |
Slow release urea fertilizer composition and a process for the preparation of the said composition |
Jan. 8, 2002 |
| 6331198 |
Composition useful as nitrification inhibiting additive for ammonia producing fertilizers |
Dec. 18, 2001 |
| 6139596 |
Nitrification inhibitors and the use of polyacids to treat mineral fertilizers containing a nitrification inhibitor |
Oct. 31, 2000 |
| 6066190 |
Combination of active ingredients for inhibiting or controlling nitrification |
May. 23, 2000 |
| 5951736 |
Combinations of active ingredients for inhibiting or controlling nitrification |
Sep. 14, 1999 |
| 5741345 |
Combination of active ingredients for inhibiting or controlling ammonia nitrification in arable topsoil and subsoil |
Apr. 21, 1998 |
| 5698003 |
Formulation for fertilizer additive concentrate |
Dec. 16, 1997 |
| 5637131 |
Agent combinations to inhibit or control nitrification of ammonia nitrogen in cultivated soils and substrates |
Jun. 10, 1997 |
| 5549728 |
Urea-containing fertilizer with reduced rate of ammonia release |
Aug. 27, 1996 |
| 5482529 |
Fertilizing preparation improving the extraction of phosphorus for plants |
Jan. 9, 1996 |
| 5435821 |
Controlled release vegetation enhancement agents coated with sulfonated polymers, method of production and prcesses of use |
Jul. 25, 1995 |
| 5364438 |
Fluid urea-containing fertilizer |
Nov. 15, 1994 |
| 5352265 |
Granular urea-based fertilizer |
Oct. 4, 1994 |
| 5261939 |
Nitrification-inhibiting agent |
Nov. 16, 1993 |
| 5147441 |
Biological product for soil improvement and method of application to soil |
Sep. 15, 1992 |
| 5024689 |
Nitrogen fertilizer |
Jun. 18, 1991 |
| 5022912 |
Methods for fertilizing with ammoniacal fertilizers |
Jun. 11, 1991 |
| 4975107 |
Soil treating method and composition for conserving nitrogen in naturally alkaline soil |
Dec. 4, 1990 |
| 4969946 |
Soil treating method and composition for conserving nitrogen in naturally alkaline soil |
Nov. 13, 1990 |
| 4954156 |
N,N-dihalo-2-imidazolidinones and N-halo-2-oxazolidinones as urease and nitrification inhibitors |
Sep. 4, 1990 |
| 4932991 |
Thiopyridine-N-oxides, thiopyridines, and thiopyrimidines as urease inhibitors |
Jun. 12, 1990 |
| 4932992 |
Dual purpose urease and nitrification inhibitors |
Jun. 12, 1990 |
| 4925476 |
Azole hemiaminal derivatives and their use as nitrification inhibitors |
May. 15, 1990 |
| 4808206 |
Microcapsules and methods for their preparation |
Feb. 28, 1989 |
| 4746349 |
Method and compositions for suppressing the nitrification of ammonium in plant growth medium |
May. 24, 1988 |
| 4740233 |
Substituted 1,2,4-triazolo[1,5-a]-pyrimidine-2-sulfonamides and compositions and methods of controlling undesired vegetation and suppressing the nitrification of ammonium nitrogen in soil |
Apr. 26, 1988 |
| 4696693 |
Oxidized sulfur derivatives of diaminophosphinyl compounds as urease inhibitors and urease inhibited urea based fertilizer compositions |
Sep. 29, 1987 |
| 4676822 |
Fluid fertilizers containing thiophosphoryl triamide |
Jun. 30, 1987 |
| 4673429 |
Nitrification-inhibiting 1-hydroxypyrazole derivatives |
Jun. 16, 1987 |
| 4670038 |
Cyclotriphosphazatriene-derivatives as soil urease activity inhibitors |
Jun. 2, 1987 |
| 4602927 |
4-alkylimidazole derivatives and their use as nitrification inhibitors |
Jul. 29, 1986 |
| 4576625 |
Fertilizers containing urea with urease inhibitors |
Mar. 18, 1986 |
| H25 |
Thiophosphoryl triamide as a urease inhibitor |
Feb. 4, 1986 |
| 4559076 |
Nitrogen fertilization |
Dec. 17, 1985 |
| 4552581 |
Method of inhibiting nitrification of ammonium nitrogen |
Nov. 12, 1985 |
| 4551167 |
Method of soil nitrification inhibition by application of a stabilized fumigant composition |
Nov. 5, 1985 |
| 4551166 |
Nitrogen fertilizer and process for its manufacture |
Nov. 5, 1985 |
| 4550173 |
Ditriazolylvinyl phenyl ketones |
Oct. 29, 1985 |
| 4545802 |
Soil treating method and composition for conserving nitrogen in soil |
Oct. 8, 1985 |
| 4545803 |
Soil treating method and composition for conserving nitrogen in soil |
Oct. 8, 1985 |
| 4540428 |
Phosphorotriamidate urease inhibitors and urease inhibited urea based fertilizer compositions |
Sep. 10, 1985 |
| 4539037 |
Urease inhibited urea based fertilizer compositions containing N-aryl-N-aliphatic phosphorotriamide compounds |
Sep. 3, 1985 |
| 4537614 |
S-aryl and S-aliphatic diamidophosphorothiolates as urease inhibitors and urease inhibited urea based fertilizer compositions |
Aug. 27, 1985 |
| 4530714 |
N-aliphatic and N,N-aliphatic phosphoric triamide urease inhibitors and urease inhibited urea based fertilizer compositions |
Jul. 23, 1985 |
| 4528020 |
Urease inhibited urea based fertilizer compositions |
Jul. 9, 1985 |
| 4523940 |
Soil treating method and composition for conserving nitrogen in soil |
Jun. 18, 1985 |
| 4522642 |
Soil treating method and composition for conserving nitrogen in soil |
Jun. 11, 1985 |
| 4519831 |
Method of converting sewage sludge to fertilizer |
May. 28, 1985 |
| 4518413 |
Poly-phosphorodiamide urease inhibitors and urease inhibited urea based fertilizer compositions |
May. 21, 1985 |
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