Michael Geoffrey Tate

US Patent:

46132805, Sep 23, 1986

Filed:

Sep 21, 1984

Appl. No.:

6/653036

Inventors:

Michael J. Tate - Stratford CT

Assignee:

Avco Corporation - Stratford CT

International Classification:

F01D 2512
F01D 2100

US Classification:

415 17

Abstract:

A turbine engine is constructed to passively modulate the flow of cooling air into the shroud. Sealing rings are disposed relative to the cooling air inlets in the shroud such that pressure and temperature variations in the engine will cause the cooling air inlets to be either fully opened, completely blocked by the sealing ring, or modulating therebetween in accordance with the cooling needs of the shroud.

US Patent:

20220411305, Dec 29, 2022

Filed:

Jul 8, 2022

Appl. No.:

17/861058

Inventors:

- Richmond, CA
Michael John Tate - Oregon OH, US
Narain Hariharan - South Jordan UT, US

International Classification:

C02F 11/145
C02F 1/66
C10G 1/04
C02F 1/52
B09C 1/08

Abstract:

Methods and systems for reducing greenhouse gas emissions from sediments containing organic materials via treatment with lime are disclosed herein. In some embodiments, the method comprises (i) providing sediments comprising a first pH less than 10.0, fermentable organic materials, and microbes configured to produce carbon dioxide and/or methane via degradation of the organic material; (ii) adding a coagulant comprising lime to the sediment to produce a mixture comprising a second pH of at least 11.0 and excess soluble calcium ions; and (iii) after adding the coagulant, forming a buffer comprising soluble sodium and calcium bicarbonates within the mixture by enabling the excess soluble sodium and calcium ions to react with carbon dioxide. Forming the buffer can comprise decreasing the pH of the mixture from the second pH to a third pH of 8.0 or greater.

US Patent:

20220195306, Jun 23, 2022

Filed:

Dec 23, 2021

Appl. No.:

17/560884

Inventors:

- Richmond, CA
Michael John Tate - Oregon OH, US
Jared Ira Leikam - West Jordan UT, US
Jesse Wayne Fox - West Valley City UT, US
Narain Hariharan - South Jordan UT, US

International Classification:

C10G 1/04
C04B 18/04
C02F 11/145
C04B 18/12

Abstract:

Methods and systems for calcining dewatered tailings and/or mine waste are disclosed herein. In some embodiments, the method comprises (i) processing dewatered tailings comprising clay minerals, (ii) calcining the processed tailings to produced calcined tailings, and (iii) altering a composition and/or one or more characteristics of the calcined tailings to produce a cementitious product. Altering the composition can include blending the calcined tailings with one or more additives, such as lime, dolomitic lime, lime kiln dust, argillaceous limestone, limestone, pulverized quicklime, ground calcium carbonate, quicklime, gypsum, natural pozzolans, artificial pozzolans, water, flow aids, or the like.

US Patent:

20210347666, Nov 11, 2021

Filed:

May 5, 2021

Appl. No.:

17/308365

Inventors:

- Richmond, CA
Michael John Tate - Oregon OH, US

International Classification:

C02F 11/145
C02F 1/66

Abstract:

Methods and systems for reducing greenhouse gas emissions from sediments containing organic materials via treatment with lime are disclosed herein. In some embodiments, the method comprises (i) providing sediments comprising a first pH less than 10.0, fermentable organic materials, and microbes configured to produce carbon dioxide and/or methane via degradation of the organic material; (ii) adding a coagulant comprising lime to the sediment to produce a mixture comprising a second pH of at least 11.0 and excess soluble calcium ions; and (iii) after adding the coagulant, forming a buffer comprising soluble sodium and calcium bicarbonates within the mixture by enabling the excess soluble sodium and calcium ions to react with carbon dioxide. Forming the buffer can comprise decreasing the pH of the mixture from the second pH to a third pH of 8.0 or greater.

US Patent:

20210292198, Sep 23, 2021

Filed:

May 10, 2021

Appl. No.:

17/316633

Inventors:

- Richmond, CA
Michael John Tate - Oregon OH, US
Jared Ira Leikam - West Jordan UT, US
Nikolas Andrei Romaniuk - Alberta, CA

International Classification:

C02F 1/52
C02F 1/38
C02F 1/00

Abstract:

Methods and systems for treating oil sands tailings streams using multiple dosages of lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 3-40% solids by total weight, combining the tailings stream with a first dosage of lime to produce a first mixture having a pH of less than 12.0, and then combining the first mixture with a polymer to produce a second mixture. In some embodiments, the method can further include combining the second mixture with a second dosage of lime to produce a third mixture having a pH greater than 12.0, and dewatering the third mixture in a centrifuge unit and/or a pressure filtration unit to produce a product stream having 55% or more solids by weight.