Preservation of Douglas fir needles
US4248734A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1980 |
| Grant date | Feb 3, 1981 |
| Priority date | — |
| Expiry date | Jan 14, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N3/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A solution and process for preserving Douglas Fir needles while preventing shedding thereof from the branch to which they are naturally attached, producing a natural looking product suitable for display purposes. The branches, with attached needles, are immersed in a solution comprising (in amounts per liter of solution): PA0 300-500 ml water PA0 200-300 ml ethyl alcohol PA0 0-75 ml ethylene glycol PA0 50-75 ml propionic acid PA0 0-20 ml glycerin PA0 100-150 ml formalin PA0 50-175 ml propylene glycol PA0 40-75 gms citric acid PA0 1-7 gms magnesium sulphate PA0 15-25 gms cupric sulphate PA0 5-10 gms sodium sulphite PA0 0-10 gms seaweed extract, for a period of up to about two weeks and subsequently air dried.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.