Anionic polymers composed of dicarboxylic acids and uses thereof
US6756461B2 · kind B2 · utility
10Cited by
6References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2003 |
| Grant date | Jun 29, 2004 |
| Priority date | — |
| Expiry date | May 15, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2809
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Biodegradable anionic polymers are disclosed which include recurring polymeric subunits preferably made up of dicarboxylic monomers such as maleic anhydride, itaconic anhydride or citraconic anhydride. Free radical polymerization is used in the synthesis of the polymers. The polymers may be complexed with ions and/or mixed with fertilizers or seeds to yield agriculturally useful compositions. The preferred products of the invention may be applied foliarly or to the earth adjacent growing plants in order to enhance nutrient uptake by the plants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.