Chemistry: molecular biology and microbiology – Apparatus – Including measuring or testing
Patent
1985-06-03
1987-02-17
Focarino, Margaret A.
Chemistry: molecular biology and microbiology
Apparatus
Including measuring or testing
435299, 435801, 422236, C12M 100
Patent
active
046439730
ABSTRACT:
A unit in the form of a bubble pack for creating an anaerobic gaseous atmosphere in a bag and for indicating the presence of the anaerobic atmosphere in the bag. One bubble of the pack houses an acid-containing ampoule and also houses tablets which generate hydrogen and carbon dioxide when activated by squeezing the bubble to crush the ampoule and release the acid. Another bubble communicates with the first bubble by way of a tunnel-like bubble and serves as an expansion chamber for the gas and the released acid. Gas flows from the expansion bubble into the bag and enters still another bubble which houses an ampoule containing a redox color indicating liquid. When the latter ampoule is crushed, the liquid moistens an absorbent pad which changes colors as the atmosphere of the bag changes from aerobic to anaerobic.
REFERENCES:
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patent: 4013422 (1977-03-01), Spinner et al.
patent: 4023934 (1977-05-01), Spinner et al.
patent: 4287306 (1981-09-01), Brewer
patent: 4347222 (1982-08-01), Beall et al.
patent: 4377554 (1983-03-01), Johnson
patent: 4546086 (1985-10-01), Hounsell
Focarino Margaret A.
Marion Laboratories, Inc.
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