David W Carlson

Address:

803 Poe Ave, Ames, IA 50014

VIN:

KL1TD566X8B014196

Make:

CHEVROLET

Model:

AVEO

Year:

2008

US Patent:

8450094, May 28, 2013

Filed:

Mar 3, 2010

Appl. No.:

12/717002

Inventors:

Neelakantam V. Narendranath - Sioux Falls SD, US
David Charles Carlson - Yankton SD, US

Assignee:

Poet Research, Inc. - Sioux Falls SD

International Classification:

C12P 7/10
C12P 7/08
C12P 7/06
C12P 7/00

US Classification:

435161, 435132

Abstract:

A system and method for managing an ethanologen for use in biorefinery is disclosed. The method for propagating ethanologen for use in the production of a fermentation product from biomass omprises the steps of providing a medium for propagation of ethanologen and supplying a first cell mass of ethanologen to the medium. A first cell mass of ethanologen is propagated into a larger second cell mass of ethanologen. The system for propagating ethanologen for use in the production of a fermentation product from biomass comprises a first stage comprising a first vessel configured to maintain a medium comprising ethanologen and a second stage comprising a second vessel configured to maintain a medium supplied from the first stage.

US Patent:

20100227369, Sep 9, 2010

Filed:

Mar 3, 2010

Appl. No.:

12/717015

Inventors:

Neelakantam V. Narendranath - Sioux Falls SD, US
David Charles Carlson - Yankton SD, US

International Classification:

C12P 7/10
C12M 1/16

US Classification:

435165, 4353031

Abstract:

A biorefinery and a system for producing a fermentation product from biomass are disclosed. The biorefinery comprises a preparation system to prepare the biomass into prepared biomass; a pre-treatment system to pre-treat the prepared biomass with a dilute acid for separation into a first component from which pentose can accessed for fermentation and a second component from which hexose can be made available for fermentation; a first treatment system to treat the first component into a treated first component by removing removed components from the first component; a first fermentation system to produce a first fermentation product from the pentose; a distillation system to recover ethanol from the first fermentation product; and a treatment system to process removed components. The biomass comprises lignocellulosic material, which comprises at least one of corn cobs, corn plant husks, corn plant leaves and corn plant stalks.

US Patent:

41129270, Sep 12, 1978

Filed:

Apr 6, 1977

Appl. No.:

5/785174

Inventors:

David L. Carlson - Ames IA

Assignee:

Renco Corporation - Minneapolis MN

International Classification:

A61B 1000

US Classification:

128 2V

Abstract:

A pulsed ultrasonic detection system particularly adapted for detection of biological tissue includes a probe for placement against the body, apparatus for transmitting ultrasonic energy into the body and for receiving return pulses, signal processing circuits and a cathode ray tube display for displaying the return pulses as a function of time. A gating signal is generated after a predetermined time delay from each transmitted pulse, and the time delay and the duration of the gating signal are selected to correspond to the timing of a particular expected return pulse. Return pulses are gated into an audible signal device by a switching device, but only during the time interval thus defined by the gating signal. If a return pulse of sufficient amplitude occurs during the gated interval, the audible signal device is energized.

US Patent:

43590560, Nov 16, 1982

Filed:

Jan 8, 1981

Appl. No.:

6/223481

Inventors:

David L. Carlson - Ames IA

Assignee:

Renco Corporation - Minneapolis MN

International Classification:

A61B 1000

US Classification:

128660

Abstract:

An automatic digital backfat meter. An apparatus and method primarily for measuring the thickness of backfat in an animal which automatically adjusts sensitivity and notifies the user when a proper reading is obtained. The transducer (62) produces pulses which pass amplifier (64), threshold detector (68), and are counted in counter (74). If two counts are received, indicator (76) is activated. If two counts are not received, the cycle is repeated and the amplifier (64) has its gain increased by sensitivity control (66) in a stepwise increment until the first fat layer is detected. Time delay (78) prevents the first echo from being counted at counter (74).

US Patent:

56853076, Nov 11, 1997

Filed:

Feb 28, 1995

Appl. No.:

8/395844

Inventors:

Kyle H. Holland - Lincoln NE
David L. Carlson - Ames IA

Assignee:

Iowa State University Research Foundation, Inc. - Ames IA

International Classification:

A61B 800

US Classification:

12866001

Abstract:

A method and apparatus for tissue characterization of animals using ultrasound wherein the apparatus generally comprises a hand-held ultrasound transducer array, a power source, a data acquisition unit and a communications means for coupling the hand-held ultrasound transducer array to the data acquisition unit. Display means and input means are provided for the control of the device by a user. The method includes gathering data concerning the animal tissue by using the apparatus to generate and receive ultrasound signals into and from the animal tissue and then processing the data which are gathered. This processing includes analyses which determine whether or not the hand-held ultrasound transducer array was positioned correctly relative to the animal tissue as well as the fat percentage and marbleization of the tissue.

US Patent:

47007117, Oct 20, 1987

Filed:

Nov 22, 1985

Appl. No.:

6/801080

Inventors:

David L. Carlson - Ames IA

Assignee:

Renco Corporation - Minneapolis MN

International Classification:

A61B 1000

US Classification:

128660

Abstract:

An ultrasonic sounding apparatus is described for measuring backfat and determining pregnancy in animals, having a plurality of self-test features to ensure integrity of the measurements. In the preferred embodiment, a hand-held ultrasonic device is described for detecting increased amounts of amniotic fluid in an animal's uterus for an indication of pregnancy. Every two and one half seconds the hand-held ultrasonic device emits a small tone indicating that the transducer is in correct contact with the body of the animal. The generation of this skin contact tone is performed using the same ultrasonic circuitry that is used to detect the amniotic fluid, thereby providing the dual function of circuit self-test and skin contact test. In addition, the device includes a power-up confidence test to test the components of the circuit and indicate by an audible tone that everything is working properly. This power-up confidence test also uses the same ultrasonic circuitry that performs the detection of amniotic fluid.

US Patent:

43590551, Nov 16, 1982

Filed:

Jun 23, 1980

Appl. No.:

6/162319

Inventors:

David L. Carlson - Ames IA

Assignee:

Renco Corporation - Minneapolis MN

International Classification:

A61B 1000

US Classification:

128660

Abstract:

An automatic digital backfat meter. An apparatus and method primarily for measuring the thickness of backfat in an animal which automatically adjusts sensitivity and notifies the user when a proper reading is obtained. The transducer (62) produces pulses which pass amplifier (64), threshold detector (68), and are counted in counter (74). If two counts are received, indicator (76) is activated. If two counts are not received, the cycle is repeated and the amplifier (64) has its gain increased by sensitivity control (66) in a stepwise increment until indicator light (76) is activated. Time delay (78) prevents the first echo from being counted at counter (74).

US Patent:

46712895, Jun 9, 1987

Filed:

Nov 8, 1985

Appl. No.:

6/796748

Inventors:

James D. Gainsley - St. Louis Park MN
David M. Vikre - Coon Rapids MN
Jack E. Larsen - Champlin MN
William F. Hursh - Minneapolis MN
David L. Carlson - Ames IA

Assignee:

Renco Corporation - Minneapolis MN

International Classification:

A61B 1000

US Classification:

128660

Abstract:

A housing is disclosed for an apparatus for determining pregnancy in animals which includes a pressure activated switch. The housing includes a housing portion formed from integrally molded synthetic plastic which is selected to have a rigidity which varies with the thickness of the material. The handle includes walls which define a chamber for receiving components of the apparatus including a pressure activated switch. The walls are selected to have material thickness sufficient for the walls to be rigid in response to a pressure applied by an operator's hand. A digit engaging portion of one of the walls is provided with a reduced thickness sufficient for the digit engaging portion to flex into the chamber in response to a pressure applied by an operator's hand and returned to a rest position when pressure is withdrawn. The pressure activated switch is included within the chamber and has a pressure activated element opposing the digit engaging portion.