Gilbert W Brassell

6395050, May 28, 2002

Oct 5, 2000

09/680505

Terry J. Wickland - Evergreen CO
Michael D. Peterson - Parker CO
David E. Joseffy - Lakewood CO
Gilbert A. Brassell - Golden CO

Nuclear Filter Technology, Inc. - Golden CO

B01D 5304

553854, 55417, 96413, 96417

Vent filters for containers such as barrels which contain hazardous waste, such as transuranic (nuclear) waste, include a bore therethrough which does not intersect the material of carbon-to-carbon filter media inserts disposed within the vent filter. Each of the bores has a stainless steel tube disposed therein wherein the stainless steel tube has at an interior end a septa-type seal and at an outer end an impenetrable plug. In order to sample head gases, a syringe is used with a needle that penetrates the septa-type seal. After the needle is withdrawn, the septa-type seal closes and the impenetrable plug is replaced.

6557428, May 6, 2003

Aug 7, 2001

09/922943

Terry J. Wickland - Evergreen CO
Darold M. Popish - Golden CO
Gilbert Brassell - Golden CO
Fred L. Popish - Arvada CO
Mark A. Castagneri - Arvada CO
Michael D. Peterson - Parker CO

Nuclear Filter Technology, Inc. - Golden CO

G01N 100

7386474

A headspace gas sampling and venting method utilizes a vent port and a sampling port which are punched through the lid of a drum containing hazardous materials, such as transuranic waste. In accordance with the system, a punch having a hollow passage therethrough, which passage has a filter element therein is first inserted through the lid using a pneumatic gun. A second punch, similar to the first punch, but having a passage with a septa seal therein is thereafter inserted through the lid with the pneumatic gun. Headspace gas beneath the lid is then sampled with a needle inserted through the septa seal. Both the venting port and sampling port are configured with detachable punch points which pass through the lid and are then released from the venting and sampling ports so as to open ends of the passages therethrough for communication with the headspace. In a preferred embodiment of the invention, the punch points are held on the venting and sampling ports by annular plastic retainers which break when the ports are inserted through the drum lid, thus allowing detachable punch points to fall away.

6935199, Aug 30, 2005

Nov 20, 2002

10/299911

Terry J. Wickland - Evergreen CO, US
Darold M. Popish - Golden CO, US
Gilbert Brassell - Golden CO, US
Fred L. Popish - Arvada CO, US
Mark A. Castagneri - Arvada CO, US
Michael D. Peterson - Parker CO, US

Nuclear Filter Technology, Inc. - Golden CO

G01N001/00

7386474, 83660

A headspace gas sampling and venting method utilizes a vent port and a sampling port which are punched through the lid of a drum containing hazardous materials, such as transuranic waste. In accordance with the system, a punch having a hollow passage therethrough, which passage has a filter element therein is first inserted through the lid using a pneumatic gun. A second punch, similar to the first punch, but having a passage with a septa seal therein is thereafter inserted through the lid with the pneumatic gun. Headspace gas beneath the lid is then sampled with a needle inserted through the septa seal. Both the venting port and sampling port are configured with detachable punch points which pass through the lid and are then released from the venting and sampling ports so as to open ends of the passages therethrough for communication with the headspace. In a preferred embodiment of the invention, the punch points are held on the venting and sampling ports by annular plastic retainers which break when the ports are inserted through the drum lid, thus allowing detachable punch points to fall away.

6948391, Sep 27, 2005

Mar 21, 2003

10/393290

Gilbert Brassell - Golden CO, US
Terry J. Wickland - Evergreen CO, US
Darold M. Popish - Golden CO, US

Nuclear Filter Technology - Golden CO

G01N001/14

7386384, 7386474

A probe with an integral filtered vent and sampling port has a hollow shaft configured as a drill bit which in use passes through the lid of a drum containing waste products within a liner. The hollow shaft has a penetrating tip and at lest two radial bores, one of which is positioned to open to the space within the liner and the other of which is positioned to open to the space above the liner and between the liner and drum lid. The shaft has a head with a pocket which contains a filter element, the head also having a radial sampling port with a septa seal. In order to sample head space gases, a hypodermic needle is pushed through the septa seal into the longitudinal bore of the hollow shaft, and then withdrawn, allowing the septa seal to close behind the needle. The probe is especially useful for sampling nuclear waste stored within drums having liners. This is because the probe has a first radial port adjacent the penetrating tip thereof which samples gas within the liner and a second radial port disposed between the liner and lid for sampling gas which has escaped past the liner.

43327516, Jun 1, 1982

Mar 13, 1980

6/129868

Gilbert W. Brassell - Lenoir City TN
John Lewis - Oak Ridge TN
Gary W. Weber - Amherst NY

The United States of America as represented by the United States
Department of Energy - Washington DC

B29C 2500
B29C 700

264 28

The present invention relates to a method for fabricating ultra-thin films of pyrolytic carbon. Pyrolytic carbon is vapor deposited onto a concave surface of a heated substrate to a total uniform thickness in the range of about 0. 1 to 1. 0 micrometer. The carbon film on the substrate is provided with a layer of adherent polymeric resin. The resulting composite film of pyrolytic carbon and polymeric resin is then easily separated from the substrate by shrinking the polymeric resin coating with thermally induced forces.

47725087, Sep 20, 1988

Jan 24, 1986

6/822164

Gilbert W. Brassell - Golden CO

B32B 702
B32B 900
B01D 4600

428218

A carbon bonded carbon fiber composite having a surface area greater than about 10 m. sup. 2 /g, and a compressive strength of about 20 psi or higher provides excellent filtering capacity in an activated carbon able to withstand heretofore intolerable environmental disturbances.

49575228, Sep 18, 1990

Jun 6, 1989

7/362151

Gilbert W. Brassell - Golden CO

B01D 5304

55316

Performance of filters is improved by covering a surface thereof with a material which is permeable to gas but impermeable to liquids, e. g. , Gortex. RTM.

57674221, Jun 16, 1998

Oct 2, 1996

8/725021

Gilbert W. Brassell - Lakewood CO
John L. Warren - Lakewood CO
Charles E. Wickland - Tabernash CO
Harold J. Sanchez - Lakewood CO
Mark A. Castagneri - Lakewood CO

NFT Incorporated - Lakewood CO

G01N 110

7386474

Transuranic waste generated at Department of Energy operations have been packaged to a large extent in unvented fifty-five gallon steel drums and have been stored with the intention of future retrieval. There are safety concerns regarding these drums because of a potential presence of hydrogen and methane generated by radiolysis of hydrogenous wastes and/or of traces of combustible volatile organic compounds contained in original waste materials. Methods and apparatus are provided for penetrating the packed drums and drum liner lids and for sampling and analyzing headspace gases as well as for purging undesirable gas mixtures and installing high efficiency particulate air filter vents. The steps of the method are performed by automated apparatus which is configured to isolate the drums having contents being tested from the surrounding environment and for inserting vents with filters concurrently with performing the tests.