Donald A Stoltenberg Deceased419 Ashland Ave, Park Ridge, IL 60068

4033873, Jul 5, 1977

May 14, 1973

5/359646

Donald A. Stoltenberg - Park Ridge IL

Pureco Systems, Inc. - Rosemont IL

B01D 3518

210186

The gasket-engaging sealing rim of the solids collection vessel of a filtration apparatus is provided with means for cooling its gasket-engaging surface to a stream condensing temperature, and means is provided to direct a flow of steam or other source of water vapor over the gasket-engaging surface while the surface is disengaged from the gasket during discharge of filtered solids, thereby wetting the surface while it is exposed to the atmosphere. This wetting of the surface prevents the accumulation of solids on the surface by the evaporative drying thereon of filtrate solutions, which may come in contact with the surface during the filtration operation.

5341597, Aug 30, 1994

Jan 22, 1993

8/008557

Donald A. Stoltenberg - Park Ridge IL

E05F 1100

49199

A power operated door which fits into a wall opening with an outer surface flush with the outer wall surface and displaceable upwardly to a horizontal open position by tilting the top of the door inwardly and then sliding it in vertical and horizontal tracks to the open position. A first drive mechanism on the door tilts it about a lower bearing and a second drive mechanism drives the door upwardly and downwardly by means of flexible connectors which pull upwardly and downwardly on the bottom of the door.

5572829, Nov 12, 1996

Jun 29, 1995

8/498244

Donald A. Stoltenberg - Park Ridge IL

E05D 1518

49200

A power operated garage door of the type having a single section movable from a vertical closed position to a horizontal open position at the ceiling of the garage by cables which pull the door open and closed and are secured to the door by extensions of the journal bearings for pivotally supporting the lower edge of the door.