Chemistry: analytical and immunological testing – Composition for standardization – calibration – simulation,...
Patent
1994-05-20
1995-04-25
Housel, James C.
Chemistry: analytical and immunological testing
Composition for standardization, calibration, simulation,...
422 56, 435299, C12M 116
Patent
active
054098386
ABSTRACT:
The present invention provides a culture device for growing microorganisms having a self supporting substrate coated with a cold-water soluble dry powder which is a mixture of gelling agents and nutrients and a transparent cover sheet having a layer of a water-soluble pressure sensitive adhesive containing indicator dyes on a surface adjacent to the substrate wherein the improvement includes either adding a sufficient amount of a water-insoluble organic acid to the adhesive or including a sufficient amount of acrylic acid as a comonomer in the adhesive in order to inhibit or prevent a premature color change of the indicator dyes.
REFERENCES:
patent: Re24906 (1960-12-01), Ulrich
patent: 3867258 (1975-03-01), Forgione
patent: 4476226 (1984-10-01), Hansen et al.
patent: 4565783 (1986-01-01), Hansen et al.
patent: 4895745 (1990-01-01), Vesley et al.
patent: 5089413 (1992-02-01), Nelson et al.
patent: 5232838 (1993-08-01), Nelson et al.
Fred et al., "The Reduction of 2,3,5-Triphenyltetrazolium Chloride by Penicillium chrysogenum", Science, vol. 109, pp. 169-170, Feb. 18, 1949.
Busse Paul W.
Freed Rachel Heather
Griswold Gary L.
Housel James C.
Kirn Walter N.
LandOfFree
Use of acid to stabilize indicator dyes in acrylate adhesives does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Use of acid to stabilize indicator dyes in acrylate adhesives, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Use of acid to stabilize indicator dyes in acrylate adhesives will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1567186