Donald Charles Zipperian

US Patent:

20060227458, Oct 12, 2006

Filed:

Apr 8, 2005

Appl. No.:

11/102905

Inventors:

Donald Zipperian - Tucson AZ, US

Assignee:

Pace Technologies Corporation - Tucson AZ

International Classification:

G11B 5/10

US Classification:

360128000

Abstract:

Corrosion inhibitor compositions and methods useful in finishing, grinding, cleaning, and other operations involving materials used in the manufacture of magnetic reading/writing heads and magnetic storage media. The compositions contain at least one azole compound, are soluble in ethylene glycol, propylene glycol, glycerin and isopropyl alcohol, and provide corrosion resistance for magnetic metals, such as manganese, iron, nickel, and cobalt, as well as magnetic alloys and magnetic layered stacks containing manganese, iron, nickel, cobalt, chromium, iridium, ruthenium, zirconium, and tantalum.

US Patent:

43942580, Jul 19, 1983

Filed:

Jun 25, 1981

Appl. No.:

6/276809

Inventors:

Donald E. Zipperian - Tucson AZ

Assignee:

The Diester Concentrator Co., Inc. - Fort Wayne IN

International Classification:

B03D 124

US Classification:

209170

Abstract:

The invention relates to the concentration of particulate matter by froth flotation and in particular to improvements leading to the conservation of water. The apparatus includes an upstanding flotation compartment adapted to contain a relatively quiescent body of aqueous pulp. Aqueous pulp is introduced into and float fraction is collected from the upper portion of the flotation compartment, and hydraulic and aeration compartments are disposed near the bottom of the flotation compartment for aerating the water therein. A water-collecting compartment connected to the bottom of the hydraulic and aeration compartments is adapted to receive water from the latter. A tailings-discharge duct centrally of the flotation compartment extends through the hydraulic, aeration and water collection compartments to discharge fluidized tailings. The water-collecting compartment is connected to drain into a water-replenishing reservoir having an outlet leading to a pump which in turn is connected back to the hydraulic and aeration compartments. The reservoir is adapted to receive other water from a suitable source.

US Patent:

50789210, Jan 7, 1992

Filed:

Jul 12, 1990

Appl. No.:

7/551932

Inventors:

Donald E. Zipperian - Tucson AZ

Assignee:

The Deister Concentrator Company, Inc. - Fort Wayne IN

International Classification:

B01F 304

US Classification:

261122

Abstract:

A column flotation cell includes a fluid vessel, an exteriorly mounted microbubble generator, conduits for conducting a pressurized mixture of bubbles and liquid from the generator to the vessel, features for inhibiting the coalescence and enlargement of the bubbles prior to their introduction into the vessel, and an arrangement for introducing the bubble/liquid mixture into the vessel and for distributing the mixture uniformly throughout the vessel cross-section. Coalescence and enlargement of the bubbles are inhibited by limiting the length of the mixture-conducting conduits, and by designing the conduits so as to provide a substantially uniform and continuous flow diameter. The uniform and continuous nature of the flow diameter reduces local disturbances of fluid flow which would otherwise occur at discontinuities in the flow path, tending to cause coalescence and enlargement of the bubbles. The inside diameter of the conduit on the downstream end is not greater than the inside diameter on the upstream end so as to maintain the pressure and velocity of the mixture flow substantially constant. A plurality of conduits are preferably used for conducting the mixture from the bubble generator to the vessel.

US Patent:

52288862, Jul 20, 1993

Filed:

Aug 30, 1991

Appl. No.:

7/753654

Inventors:

Donald C. Zipperian - Tucson AZ

Assignee:

Buehler, Ltd. - Lake Bluff IL

International Classification:

B24D 300

US Classification:

51293

Abstract:

A mechanochemical polishing abrasive and a process for using the mechanochemical polishing abrasive to polish the surface of a hardened workpiece cheaply and efficiently. The mechanochemical polishing abrasive comprises a slurry of colloidal silica and a mechanical abrasive selected from one or more of the materials in the group comprising Fe. sub. 2 O. sub. 3, Fe. sub. 3 O. sub. 4, MgO, BaCO. sub. 3, CaCO. sub. 3, MnO. sub. 2, CeO, SiO. sub. 2, CeO. sub. 2, Cr. sub. 2 O. sub. 3, and Al. sub. 2 O. sub. 3.

US Patent:

49717316, Nov 20, 1990

Filed:

Dec 1, 1989

Appl. No.:

7/444727

Inventors:

Donald E. Zipperian - Tucson AZ

Assignee:

Deister Concentrator Company, Inc. - Fort Wayne IN

International Classification:

B01F 304

US Classification:

261 81

Abstract:

A method and apparatus for generating microbubbles in a flowing liquid stream for use in a froth flotation system. The system utilizes a microbubble generator having a tubular housing with an inlet end and an outlet end. Located coaxially within the housing is an inner member with an elongated, tapered, exterior surface. A porous tubular sleeve is mounted between the housing and the inner member coaxially therewith to define with the cylindrical interior surface of the housing an elongated air chamber of annular cross section. The porous sleeve has a cylindrical inner surface that defines with the exterior surface of the inner member an elongated liquid flow chamber of thin, annular cross section. An aqueous liquid is supplied to the liquid flow chamber at a relatively high flow rate and air under pressure is supplied to the air chamber so that air is forced radially inwardly through the porous sleeve to be diffused in the form of microbubbles in the flowing stream.

US Patent:

40409503, Aug 9, 1977

Filed:

Jun 6, 1975

Appl. No.:

5/584685

Inventors:

Donald Edwin Zipperian - Tuscon AZ
James Allen Jones - Tuscon AZ
Thomas Brian Buza - Tuscon AZ

Assignee:

American Cyanamid Company - Stamford CT

International Classification:

B03D 102

US Classification:

209166

Abstract:

A process for flotation of copper sulfide values from copper bearing ores wherein a collector that comprises an aqueous solution of a salt of a dialkyl thiophosphate and an N-alkyl O-alkyl thionocarbamate dissolved therein, is employed.

US Patent:

46171134, Oct 14, 1986

Filed:

Dec 18, 1984

Appl. No.:

6/683008

Inventors:

John A. Christophersen - Fort Wayne IN
Fred J. Marquardt - Fort Wayne IN
Donald E. Zipperian - Tucson AZ

Assignee:

Deister Concentrator Company, Inc. - Fort Wayne IN

International Classification:

B03D 114

US Classification:

209170

Abstract:

Improvements in flotation separating systems of the type employing small rising air bubbles to induce ascension of certain types of particles in a flotation compartment while other particle types descend toward the bottom of the compartment include a bubble passing, particle blocking barrier forming the bottom of the compartment separating the compartment from a source of air bubbles while allowing the introduction of a uniform distribution of air bubbles into the compartment in the form of a gently sloped conical plate having a plurality of aerated water passing apertures and an array of downwardly extending pocket forming baffles for limiting bubble migration along the slope of the lower plate surface. The baffles are generally configured as radially and circumferentially extending baffle portions. Particles are prevented from passing through the plate apertures by introducing additional sealing water flowing toward the barrier from beneath by way of a plurality of inwardly extending water supply pipes opening downwardly at their innermost ends.

US Patent:

47357096, Apr 5, 1988

Filed:

Jan 21, 1987

Appl. No.:

7/005916

Inventors:

Donald E. Zipperian - Tucson AZ

Assignee:

Deister Concentrator Company, Inc. - Fort Wayne IN

International Classification:

B03D 1024

US Classification:

209164

Abstract:

A froth flotation system for separating a mineral fraction from an aqueous pulp containing a mixture of mineral and gangue particles. The aqueous pulp is supplied to a pulp-filled vessel (or column) wherein a froth is formed on the surface of the pulp and collected in a launder. Gas bubbles are introduced into the pulp in the vessel by two different means to generate the froth. In accordance with one means, water is aspirated into a stream of pressurized gas (air) to form a stream of aerated water which is injected into the lower portion of the pulp-filled vessel. In accordance, the other means, a second stream of pressurized gas (air), is sparged through a porous wall of one or more micro-diffusers located within the vessel. The dual means for generating bubbles produces a significantly higher level of mineral separation than can be achieved from either means separately.