The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 23, 1991
Filed:
Oct. 03, 1988
Applicant:
Inventors:
Bernard Kafka, Rantigny, FR;
Michel Baufume, Barbery, FR;
Assignee:
Isover Saint-Gobain, Aubervilliers, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A01G / ;
U.S. Cl.
CPC ...
47 64 ; 47 87 ; 47 59 ;
Abstract
Substrates for soil-free culturing are formed from a felt of mineral fibres having a hydroretentivity gradient such that the hydroretentivity decreases in the direction of gravity. The hydroretentivity gradient may be brought about by a gradient in the fineness of the fibres such that the average diameter of the fibres increases in the direction of gravity or the density of the fibres.