| Patent Number |
Title Of Patent |
Date Issued |
| 6254655 |
Processes for preparing granular composite fertilizer compositions and products produced thereby |
July 3, 2001 |
| Granular composite fertilizer compositions are prepared by applying a liquid mixture of urea and formaldehyde to a dry substrate such as a phosphorus source, a potassium source, a secondary nutrient source, a micronutrient source or mixtures thereof and reacting the liquid mixture in |
| 6039781 |
Precoated controlled release fertilizers and processes for their preparation |
March 21, 2000 |
| A controlled release fertilizer formed from nutrient granules having intermediate or precoat layers of organic oil, such as raw linseed oil, prior to application of a polymeric, encapsulating coat. The precoat may also contain a binding agent, such as a fine clay, and a drier. The new |
| 5466274 |
Abrasion resistant coatings for fertilizers |
November 14, 1995 |
| Polymer topcoated sulfur coated fertilizer compositions are provided which exhibit slow release characteristics and are abrasion resistant, free flowing, non-smearing and essentially dustless products. |
| 5405426 |
Processes for the preparation of sulfur coated fertilizers and products produced thereby |
April 11, 1995 |
| Extended residual, controlled release sulfur coated fertilizers having polymeric topcoats applied over a sulfur coating layer are prepared wherein the sulfur coating contains a sufficient amount of a crystalline sulfur allotrope in combination with at least a minimal level of carbon |
| 5219465 |
Sulfur coated fertilizers and process for the preparation thereof |
June 15, 1993 |
| Extended residual, controlled release sulfur coated fertilizer products having polymeric topcoats applied thereover are provided which release the fertilizer at a diffusion controlled rate essentially linearly over time. Processes are also provided for preparation of such products. |
| 5102440 |
Granular slow release fertilizer composition and process |
April 7, 1992 |
| A carrierless granular slow release fertilizer composition is prepared by spraying a urea-formaldehyde resin composition having a U/F molar ratio ranging from 2.4 to 13.3 onto finely divided solid particulate raw materials and cooling the resulting sprayed product to solidify the resin |
| 4954154 |
Controlled release fertilizer gel composition and process for its production |
September 4, 1990 |
| Methylene diurea, either alone or as a component of methylene urea polymers acts as a gelling agent for producing a gel composition capable of suspending particles which are insoluble in a liquid medium. Methylene diurea as the gelling agent in a liquid medium can be used to obtain novel |
| 4411683 |
Process of preparing solid controlled release fertilizer composition |
October 25, 1983 |
| Process of preparing a solid controlled release urea-formaldehyde fertilizer composition comprising preparing an aqueous mixture of urea, formaldehyde and ammonia, heating the mixture, acidifying the mixture to initiate methylene urea polymerization and heating to complete methylene |
| 4378238 |
Controlled release particulate fertilizer composition |
March 29, 1983 |
| A controlled release particulate fertilizer composition prepared by the reaction of urea and formaldehyde comprising polymeric nitrogen in the form of methylene urea polymers of varying chain length. The majority of the polymeric nitrogen consists of short chain polymers selected from th |
