Preservation of Douglas fir needles
Patent 4248734 Issued on February 3, 1981. Estimated Expiration Date: 
January 14, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 14, 2000. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References2567929 InventorsAssigneeApplicationNo. 06/112147 filed on 01/14/1980US Classes:252/400.53, Nickel, iron, cobalt, copper, manganese, mercury, or cadmium containing427/4, PLANT MEMBER OR ANIMAL SPECIMEN COATING428/13, DISPLAY IN FRAME OR TRANSPARENT CASING; OR DIORAMA INCLUDING OR IMITATIVE OF A REAL OBJECT428/17, Flora428/22, Including naturally occurring article504/114COMPOSITIONS FOR PRESERVATION OR MAINTENANCE OF CUT FLOWERSExaminersPrimary: Silverberg, SamAttorney, Agent or FirmInternational ClassA01N 3/00 (20060101)Foreign Application Priority Data1979-01-30 CAAbstractA 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):300-500 ml water200-300 ml ethyl alcohol0-75 ml ethylene glycol50-75 ml propionic acid0-20 ml glycerin100-150 ml formalin50-175 ml propylene glycol40-75 gms citric acid1-7 gms magnesium sulphate15-25 gms cupric sulphate5-10 gms sodium sulphite0-10 gms seaweed extract,for a period of up to about two weeks and subsequently air dried. | |
