Liquid purification or separation – Processes – Separating
Patent
1991-11-08
1992-12-08
Theisen, Mary Lynn
Liquid purification or separation
Processes
Separating
137312, 141 86, 141 88, 210232, 210248, 2104331, 222108, B67D 533, B01D 3514
Patent
active
051695413
ABSTRACT:
Apparatus and methods are described for inhibiting the unintentional spillage of hazardous materials, particularly while changing filters or other storage media in environments such as service station fuel dispensers and other fuel depots. A preferred embodiment includes mechanisms for permanently attaching such apparatus and securing the same against unintended rotational or translational displacement, as well as collecting and diverting mechanisms and mechanisms to inhibit the improper removal of such filters or storage media.
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patent: 4676281 (1987-06-01), Nord
patent: 4877155 (1989-10-01), Tull
patent: 4901693 (1990-02-01), Degrazia, Jr.
patent: 4913813 (1990-04-01), Covarrubias et al.
patent: 4929356 (1990-05-01), Todd
patent: 5030345 (1991-07-01), Thomas
patent: 5058774 (1991-10-01), Hartman et al.
Drodge Joseph
Groves D. Arlon
Theisen Mary Lynn
Welex Environmental, Inc.
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