Surgery – Respiratory method or device – Ozone or ion generation
Patent
1974-07-08
1976-09-28
Michell, Robert W.
Surgery
Respiratory method or device
Ozone or ion generation
137197, 734254P, A61M 100
Patent
active
039825388
ABSTRACT:
A safety valve which may be used in a pipette or in medical or biological equipment such as collection bottles, employs a carrier which is inserted in a flow line and contains a material which swells in the presence of an unwanted fluid to block the line and provide protection against contamination.
REFERENCES:
patent: 2348831 (1944-05-01), Mathis
patent: 2850033 (1958-09-01), Hartle
patent: 3285296 (1966-11-01), Ishimaro et al.
patent: 3719197 (1973-03-01), Pannier, Jr. et al.
Layton Henry S.
Michell Robert W.
N.V. Internationale Octrooi Maatschappij "Octropa"
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