Method of forming a compost filter sock
US11123661B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2017 |
| Grant date | Sep 21, 2021 |
| Priority date | — |
| Expiry date | Jan 26, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hybrid filtration sock comprises a mesh tube filled with a blended filler comprising 60%-90% fibrous volumizing filler and 10%-40% woody organic filler. The fibrous volumizing filler 12 includes straw, grasses, pine straw, corn stalks, natural fibers and weeds and combinations thereof. The woody organic filler is ground or chipped wood based material from land clearing, yard waste, pallets and clean wood debris or clean wood scraps, comprising a PH of between 5.0 and 8.0, with a particle size wherein 99% passes a 2 in (50 mm) sieve and a maximum of 43% passes a ⅜ in (9.5 mm) sieve, and <3.5% by dry weight of inert or foreign man made materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.