Gerald Scott Nelson

US Patent:

52796370, Jan 18, 1994

Filed:

Oct 23, 1990

Appl. No.:

7/601906

Inventors:

Bart T. Lynam - Edmonds WA
Gerald F. Nelson - Portland OR
David H. Meese - Portland OR
Ronald V. Peterson - Seattle WA
Michael G. Ruby - Seattle WA
Alan White - Portland OR

Assignee:

PCL Environmental Inc. - Bellevue WA
Sludge Management, Inc. - Seattle WA
Riedel Waste Systems, Inc. - Portland OR

International Classification:

C05F 700
C02F 1100

US Classification:

71 12

Abstract:

A method of converting industrial, domestic or other sludge, into a pelletized or granular fertilizer, as well as a sludge converter for practicing the method. The sludge is dewatered to form sludge cake solids which are dried in a dryer, and then sorted with a sorter into a sorted product comprising oversized, undersized, and standard sized product. A portion of the sorted product is recycled for mixing and sizing in a mixer with the dewatered sludge cake solids. To control dust and odors, cyclones and a condenser remove a substantial portion of the gaseous particulate matter and condensable gases from the converter, and any remaining noncondensates are burned in the heat source flame. A waste oil burning heat source supplies heat energy to the dryer. The heat source exhaust gas by-products are filtered in a bag house using a conditioner additive, such as lime or sodium bicarbonate, which may be reclaimed and supplied to the standard sized product to serve as a pelletizing binder, to enhance the fertilizer nutrient value, or to enhance the fertilizer shelf life.

US Patent:

47637919, Aug 16, 1988

Filed:

Nov 3, 1987

Appl. No.:

7/120240

Inventors:

George E. Halverson - White Bear Lake MN
Gerald A. Nelson - New Brighton MN

Assignee:

Excel Dental Studios, Inc. - Minneapolis MN

International Classification:

B65D 6900
A61B 1902

US Classification:

206570

Abstract:

A dental impression kit to assist the dentist or a dental technician in the making of dental impressions preparatory to the formation of a mold and the manufacture of a crown or full or partial dentures. The kit contains a compact and orderly arranged array of items necessary or desirable in formation of dental impression. Such items include a selection of upper and lower dental impression trays, dental impression material base and catalyst, adhesive, polish, instructions and a mixing pad. From the kit, the dentist is able to select the appropriate type and size of impression tray, mix the impression base and material on a mixing pad, prepare the tray with the adhesive and then fill it with the impression material and take the dental impression, all the while having instructions at hand if necessary. The finished dentures can be polished using the polish kit. Secondary inventory control cases complement the primary case by making inventory available as items from the primary case are depleted.

US Patent:

54289068, Jul 4, 1995

Filed:

Jan 5, 1994

Appl. No.:

8/177439

Inventors:

Bart T. Lynam - Edmonds WA
Gerald F. Nelson - Portland OR
David H. Meese - Portland OR
Ronald V. Peterson - Seattle WA
Michael G. Ruby - Seattle WA
Alan White - Portland OR

Assignee:

PCL Environmental, Inc. - Bellevue WA
Sludge Management, Inc. - Seattle WA

International Classification:

F26B 700

US Classification:

34379

Abstract:

A method of converting industrial, domestic or other sludge, into a pelletized or granular fertilizer, as well as a sludge converter for practicing the method. The sludge is dewatered to form sludge cake solids which are dried in a dryer, and then sorted with a sorter into a sorted product comprising oversized, undersized, and standard sized product. A portion of the sorted product is recycled for mixing and sizing in a mixer with the dewatered sludge cake solids. To control dust and odors, cyclones and a condenser remove a substantial portion of the gaseous particulate matter and condensable gases from the converter, and any remaining noncondensates are burned in the heat source flame. A waste oil burning heat source supplies heat energy to the dryer. The heat source exhaust gas by-products are filtered in a bag house using a conditioner additive, such as lime or sodium bicarbonate, which may be reclaimed and supplied to the standard sized product to serve as a pelletizing binder, to enhance the fertilizer nutrient value, or to enhance the fertilizer shelf life.