Willis Lee Winstrom

US Patent:

6562615, May 13, 2003

Filed:

Jun 5, 2000

Appl. No.:

09/587410

Inventors:

Willis L. Winstrom - Omaha NE

Assignee:

Pennfield Oil Company - Omaha NE

International Classification:

C12M 112

US Classification:

4352891, 4352972, 435813, 552206, 424442

Abstract:

The present invention provides improved chlortetracycline-containing animal feed compositions and processes and apparatuses for their preparation. In certain embodiments, raw fermentation broth comprising chlortetracycline is divided into two portions. The first portion is mixed with a compound that complexes chlortetracycline. The second portion is acidified and the solids are removed. The acidified liquid is treated with a complexing agent to produced a chlortetracycline complex. The first and second portions thus treated are then mixed and the mixture is passed on to a filter press or other means for separation of the solids to produce a wet cake comprising complexed chlortetracycline.

US Patent:

6761899, Jul 13, 2004

Filed:

Jul 9, 1999

Appl. No.:

09/350474

Inventors:

Andrew Lee Winstrom - Omaha NE
Willis L. Winstrom - Omaha NE

Assignee:

Pennfield Oil Company - Omaha NE

International Classification:

A23K 117

US Classification:

424442, 424438, 424409, 424410, 514152

Abstract:

A medicated animal feed additive in a solid particulate or granular form having improved resistance to powdering and good fracture toughness is provided. The animal feed additive according to the present invention does require a compression or compacting step to achieve its solid structural form. The present invention also provides a method of producing animal feed compositions. In a further embodiment, the present invention relates to a method of combating microbial infection in animals comprising orally administering to said animals a prophylactic or therapeutic amount of an animal comestible composition comprising a medicated feed supplement according to the present invention.

US Patent:

6773717, Aug 10, 2004

Filed:

Mar 17, 2003

Appl. No.:

10/390453

Inventors:

Willis L. Winstrom - Omaha NE

Assignee:

Pennfield Oil Company - Omaha NE

International Classification:

A23K 117

US Classification:

424442, 424405, 424409, 424410, 424417, 424116, 424464, 424489, 426635, 514152, 514153

Abstract:

The present invention provides improved chlortetracycline-containing animal feed compositions and processes and apparatuses for their preparation. In certain embodiments, raw fermentation broth comprising chlortetracycline is divided into two portions. The first portion is mixed with a compound that complexes chlortetracycline. The second portion is acidified and the solids are removed. The acidified liquid is treated with a complexing agent to produced a chlortetracycline complex. The first and second portions thus treated are then mixed and the mixture is passed on to a filter press or other means for separation of the solids to produce a wet cake comprising complexed chlortetracycline. In alternative embodiments, the second portion may be acidified and filtered and admixed with the first portion prior to the complexing step. The resulting mixture is passed on to a filter press or other means for separation of the solids. In still further embodiments, the complexing steps are replaced with neutralizing or basification steps to yield the free base form of chlortetracycline.

US Patent:

6844006, Jan 18, 2005

Filed:

Jun 13, 2001

Appl. No.:

09/880738

Inventors:

Willis L. Winstrom - Omaha NE, US

Assignee:

Pennfield Oil Company - Omaha NE

International Classification:

A23K 117
A61K 3165

US Classification:

424442, 424438, 424409, 424410, 514152, 426 53

Abstract:

The present invention provides improved chlortetracycline-containing animal feed compositions and processes and apparatuses for their preparation. In certain embodiments, raw fermentation broth comprising chlortetracycline is divided into two portions. The first portion is mixed with a compound that complexes chlortetracycline. The second portion is acidified and the solids are removed. The acidified liquid is treated with a complexing agent to produced a chlortetracycline complex. The first and second portions thus treated are then mixed and the mixture is passed on to a filter press or other means for separation of the solids to produce a wet cake comprising complexed chlortetracycline. In alternative embodiments, the second portion may be acidified and filtered and admixed with the first portion prior to the complexing step. The resulting mixture is passed on to a filter press or other means for separation of the solids. In still further embodiments, the complexing steps are replaced with neutralizing or basification steps to yield the free base form of chlortetracycline.

US Patent:

7504112, Mar 17, 2009

Filed:

Dec 2, 2004

Appl. No.:

11/001735

Inventors:

Willis L. Winstrom - Omaha NE, US

Assignee:

Pennfield Oil Company - Omaha NE

International Classification:

A01N 63/02

US Classification:

424410, 424409, 424417, 424438, 424442, 426 2, 426 53, 426 54, 435 41

Abstract:

The present invention provides improved chlortetracycline-containing animal feed compositions and processes and apparatuses for their preparation. In certain embodiments, raw fermentation broth comprising chlortetracycline is divided into two portions. The first portion is mixed with a compound that complexes chlortetracycline. The second portion is acidified and the solids are removed. The acidified liquid is treated with a complexing agent to produced a chlortetracycline complex. The first and second portions thus treated are then mixed and the mixture is passed on to a filter press or other means for separation of the solids to produce a wet cake comprising complexed chlortetracycline. In alternative embodiments, the second portion may be acidified and filtered and admixed with the first portion prior to the complexing step. The resulting mixture is passed on to a filter press or other means for separation of the solids. In still further embodiments, the complexing steps are replaced with neutralizing or basification steps to yield the free base form of chlortetracycline.

US Patent:

6506402, Jan 14, 2003

Filed:

Jun 5, 2000

Appl. No.:

09/587411

Inventors:

Willis L. Winstrom - Omaha NE

Assignee:

Pennfield Oil Company - Omaha NE

International Classification:

A61F 1300

US Classification:

424442, 426633, 426 53, 426 54, 435 48

Abstract:

The present invention provides improved chlortetracycline-containing animal feed compositions and processes and apparatuses for their preparation. In certain embodiments, raw fermentation broth comprising chlortetracycline is divided into two portions. The first portion is mixed with a compound that complexes chlortetracycline. The second portion is acidified and the solids are removed. The acidified liquid is treated with a complexing agent to produced a chlortetracycline complex. The first and second portions thus treated are then mixed and the mixture is passed on to a filter press or other means for separation of the solids to produce a wet cake comprising complexed chlortetracycline. In alternative embodiments, the second portion may be acidified and filtered and admixed with the first portion prior to the complexing step. The resulting mixture is passed on to a filter press or other means for separation of the solids. In still further embodiments, the complexing steps are replaced with neutralizing or basification steps to yield the free base form of chlortetracycline.