Indicators for ethylene oxide

Details Indicators for ethylene oxide Indicators for ethylene oxide

1981-03-06

1985-01-22

Turk, Arnold

Chemistry: analytical and immunological testing

Process or composition for sterility or package integrity test

422 57, 422 58, 427 2, 436165, G01N 2178

Patent

active

044952910

ABSTRACT:
A device for giving a visual indication of the amount of residual ethylene oxide present in ethylene oxide treated solid hospital articles and other health devices. The amount of residual ethylene oxide is indicated by the difference in color exhibited by different sensitized areas of the device in the form of an opaque dark colored support member having bonded to its surface a thin film of a cholesteric liquid crystal composition in a solid film-forming binder. The film is made by laying down on the surface of the support member a solution or dispersion of liquid crystals which exhibits a change in color when in contact with ethylene oxide at a temperature from 60.degree. to 100.degree. F. in a solution of the solid binder, then evaporating the solvent. As prepared, the film is in a form adapted to be packaged with goods to be subjected to sterilization with ethylene oxide, a portion of the film being sealed within a transparent enclosure the walls of which possess a permeability to ethylene oxide no greater than that of the material of the treated goods.

REFERENCES:
patent: 2998306 (1961-08-01), Huyck et al.
patent: 3409404 (1968-11-01), Fergason
patent: 4015591 (1977-04-01), Suzuki et al.
patent: 4045383 (1977-08-01), Koff
patent: 4271121 (1981-06-01), Diller et al.
patent: 4285697 (1981-08-01), Neary
Brown, Glenn H., "Liquid Crystals", Industrial Research, May 1966, pp. 53-58.

Affiliated with

Also associated with

Rating

Indicators for ethylene oxide does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Indicators for ethylene oxide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indicators for ethylene oxide will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-567263