Jason E Maxey

US Patent:

6432224, Aug 13, 2002

Filed:

Feb 8, 2000

Appl. No.:

09/500372

Inventors:

Zoran Minevski - The Woodlands TX
Jason Maxey - College Station TX
Carl Nelson - Bryan TX
Cahit Eylem - College Station TX

Assignee:

Lynntech, Inc. - College Station TX

International Classification:

C23C 2283

US Classification:

148272, 148273, 148276, 148285, 427327, 427328, 427343

Abstract:

A conversion coating solution and process forms a stable and corrosion-resistant layer on metal substrates or layers or, more preferably, on a boehmite layer or other base conversion coating. The conversion coating process involves contacting the substrate, layer or coating with an aqueous alkali metal isomolybdate solution in order to convert the surface of the substrate, layer or coating to a stable conversion coating. The aqueous alkali metal molybdates are selected from sodium molybdate (Na MoO ), lithium molybdate (Li MoO ), potassium molybdate (K MoO ), or combinations thereof, with the most preferred alkali metal molybdate being sodium molybdate. The concentration of alkali metal molybdates in the solution is preferably less than 5% by weight. In addition to the alkali metal molybdates, the conversion coating solution may include alkaline metal passivators selected from lithium nitrate (LiNO ), sodium nitrate (NaNO ), ammonia nitrate (NH NO ), and combinations thereof; lithium chloride, potassium hexafluorozirconate (K ZrF ) or potassium hexafluorotitanate (K TiF ).

US Patent:

6471788, Oct 29, 2002

Filed:

Dec 15, 1999

Appl. No.:

09/461944

Inventors:

Zoran Minevski - The Woodlands TX
Jason Maxey - College Station TX
Carl Nelson - College Station TX
Cahit Eylem - College Station TX

Assignee:

Lynntech Coatings, Ltd. - College Station TX

International Classification:

C23C 2248

US Classification:

148273, 148284, 148287, 106 1421, 25218621, 25218633

Abstract:

A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0. 0166% and about 1. 66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25Â C. to 100Â C. for a period of time ranging from about 1 second to about 5 minutes.

US Patent:

6500276, Dec 31, 2002

Filed:

Dec 15, 1999

Appl. No.:

09/464284

Inventors:

Zoran Minevski - The Woodlands TX
Cahit Eylem - College Station TX
Jason Maxey - College Station TX
Carl Nelson - College Station TX

Assignee:

Lynntech Coatings, Ltd. - College Station TX

International Classification:

C23C 2248

US Classification:

148273, 148261, 148262, 106 1421, 25218621

Abstract:

The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula M O , where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BM O , where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMo O ) , (PMo V O ) , (MnPW O ) , (PW O ) , (SiMo O ) , (SiW O ) , (Mo O ) , (CeMo O ) and mixtures thereof.

US Patent:

6863743, Mar 8, 2005

Filed:

Dec 30, 2002

Appl. No.:

10/331963

Inventors:

Zoran Minevski - The Woodlands TX, US
Cahit Eylem - College Station TX, US
Jason Maxey - College Station TX, US
Carl Nelson - College Station TX, US

Assignee:

Lynntech Coatings, Ltd. - College Station TX

International Classification:

C23C022/60

US Classification:

148261, 148262, 148273

Abstract:

The present invention provides a conversion coating solution containing polymetalates and/or heteropolymetalates to oxidize the surface of various metal substrates. The polymetalates have the general formula MO, where M is selected from the group comprising Mo, V and W. The heteropolymetalates have the general formula BMO, where B is a heteroatom selected from P, Si, Ce, Mn or Co, and M is again selected from Mo, V, W or combinations thereof. The concentration of polymetalates and/or heteropolymetalates anions is preferably between about 1% and about 5% by weight. Examples of typical anions used include, but are not limited to, (PMoO), (PMoVO), (MnPWO), (PWO), (SiMoO), (SiWO), (MoO), (CeMoO) and mixtures thereof.

US Patent:

6946078, Sep 20, 2005

Filed:

Feb 27, 2002

Appl. No.:

10/084020

Inventors:

Zoran Minevski - The Woodlands TX, US
Jason Maxey - College Station TX, US
Carl Nelson - College Station TX, US
Dylan Taylor - College Station TX, US

Assignee:

Lynntech, Inc. - College Station TX

International Classification:

B01D011/02
B01D035/06
B03C001/00

US Classification:

210695, 210771, 210783, 210787, 210806, 2101981, 210222, 210223, 2103601, 2103801, 210396, 210400, 209215, 2092231, 209225, 198821

Abstract:

The method for separating ferrate salts from a solution comprising providing contact between the solution of essentially of aqueous hydroxide and the ferrate salts and a surface having a magnetic attraction, magnetically securing the ferrate salts to the surface; and eliminating contact between the solution and the surface. Contact is provided by immersing the surface in the solution, passing the liquid ferrate mixture over the surface, or combinations thereof. The magnetic attraction may be induced by permanent magnets, electromagnets, and combinations thereof. The apparatus for ferrate production comprises an electrochemical cell having an iron-containing anode, cathode, and an aqueous hydroxide solution in fluid communication with both the anode and the cathode, and a magnetic separator in fluid communication with the aqueous hydroxide solution for separating ferrate salts from the aqueous hydroxide solution.

US Patent:

7045024, May 16, 2006

Filed:

Sep 10, 2002

Appl. No.:

10/238924

Inventors:

Zoran Minevski - The Woodlands TX, US
Jason Maxey - College Station TX, US
Carl Nelson - College Station TX, US
Cahit Eylem - College Station TX, US

Assignee:

Lynntech Coatings, Ltd. - College Station TX

International Classification:

C23C 22/48
C23C 22/56

US Classification:

148273, 148243, 148275, 148277, 148287, 106 1411, 106 1421

Abstract:

A method employing oxide film conversion coatings prepared using ferrate (VI) as the oxidizing agent is disclosed. Metal substrates or surfaces, such as aluminum, aluminum alloys or other metals, are contacted with an aqueous solution comprising ferrate (VI) anions to form a corrosion resistant conversion coating on the surface thereof. The ferrate anion concentration is preferably between about 0. 0166% and about 1. 66% by weight. The coating process is carried out by dipping, spraying, or painting at temperatures ranging from 25 C. to 100 C. for a period of time ranging from about 1 second to about 5 minutes.

US Patent:

7045051, May 16, 2006

Filed:

Feb 27, 2002

Appl. No.:

10/084029

Inventors:

Zoran Minevski - The Woodlands TX, US
Jason Maxey - College Station TX, US
Carl Nelson - College Station TX, US
Dylan Taylor - College Station TX, US

Assignee:

Lynntech, Inc. - College Station TX

International Classification:

C25B 1/00

US Classification:

205543, 205548, 205509

Abstract:

A method for the electrochemical production of ferrate salts in an aqueous electrolyte solution comprising one or more hydroxide components. Dramatically increased yields of ferrate salts are obtained from using a mixture of sodium hydroxide and potassium hydroxide. Preferably, both sodium hydroxide and potassium hydroxide are present in concentrations greater than 5 molar, most preferably at least 10 molar, i. e. , 10 M NaOH and 10 M KOH. The anode is preferably a sacrificial anode made out of an iron-containing material to supply the iron necessary for the ferrate production reaction. The aqueous hydroxide solution, even a mixed potassium hydroxide (KOH) and sodium hydroxide (NaOH) solution, may be recycled and reused in the electrochemical cell, preferably after the extraction of the ferrate salt.

US Patent:

7314552, Jan 1, 2008

Filed:

Apr 28, 2005

Appl. No.:

11/116486

Inventors:

Zoran Minevski - The Woodlands TX, US
Jason Maxey - College Station TX, US
Carl Nelson - College Station TX, US
Dylan Taylor - College Station TX, US

Assignee:

Lynntech, Inc. - College Station TX

International Classification:

C01G 49/00
B01D 35/06
C02F 1/48

US Classification:

210223, 210695, 210222, 209213, 204242

Abstract:

The method for separating ferrate salts from a solution comprising providing contact between the solution of essentially of aqueous hydroxide and the ferrate salts and a surface having a magnetic attraction, magnetically securing the ferrate salts to the surface; and eliminating contact between the solution and the surface. Contact is provided by immersing the surface in the solution, passing the liquid ferrate mixture over the surface, or combinations thereof. The magnetic attraction may be induced by permanent magnets, electromagnets, and combinations thereof. The apparatus for ferrate production comprises an electrochemical cell having an iron-containing anode, cathode, and an aqueous hydroxide solution in fluid communication with both the anode and the cathode, and a magnetic separator in fluid communication with the aqueous hydroxide solution for separating ferrate salts from the aqueous hydroxide solution.