Steven R Platt

US Patent:

42631440, Apr 21, 1981

Filed:

Dec 10, 1979

Appl. No.:

6/101983

Inventors:

Steven G. Platt - El Sobrante CA

Assignee:

The United States of America as represented by the Secretary of
Agriculture - Washington DC

International Classification:

B01D 1508

US Classification:

210658

Abstract:

A device and method are described for collecting and transferring particulate material. The device includes a housing with a porous member and means for connecting the housing to a vacuum attached thereto. A plunger, slidably mounted in the housing, opens and closes fluid-flow communication between the vacuum source and the porous member. In operation the porous member with a vacuum applied to one side thereof is contacted with first a porous filamentary filter and then with the particulate material. The particulate material detachably adheres to the filter and can be transferred to a collection area. The device and method of the invention are specifically suited for collecting and transferring adsorbent chromatographic fractions.

US Patent:

61257710, Oct 3, 2000

Filed:

Jan 13, 1999

Appl. No.:

9/229978

Inventors:

Steven H. Platt - Emeryville CA
Robert W. Platt - Seattle WA

Assignee:

David L. Garrison PS - Seattle WA

International Classification:

A47B 300

US Classification:

108115

Abstract:

A conformally folding table comprises a surface assembly and a support member adapted to pivotally attach the surface assembly to a structure such as a post or mast. The surface assembly comprises a plurality of surface members and is adapted, upon being pivoted into a stowed position, to fold or "wrap," by means of relative rotations between adjacent surface members, around the structure and into close conformance with it, so as to allow storage of the table in a minimum of space. When the table is to be used, the table is pivoted away from the structure into a deployed position and the surface members are unfolded or "unwrapped" to form a flat table surface. Preferred embodiments of the table also comprise one or more legs for stability and a lateral support member to help support the surface members in forming a flat table surface.