JAMES ALBERT ACCUNTIUS
Pilots at Cielo Dr, Georgetown, TX

6410087, Jun 25, 2002

Nov 1, 1999

09/431520

David S. Wilde - Round Rock TX
Michael R. Emken - Pflugerville TX
James A. Accuntius - Georgetown TX

Medical Carbon Research Institute, LLC - Austin TX

C23C 1600

4272491, 427 215, 427213, 427248, 4272555

Pyrolytic carbon of extremely uniform crystalline characteristics and essentially free of discontinuities is obtained in a fluidized bed coater by creating an asymmetric recirculation of the fluidized bed within the high temperature coating chamber. Through the use of any of a variety of gas injection schemes, fluidizing/coating gas mixtures are injected through the three-dimensionally curved concave bottom surface of the coater to create a pattern where the fluidized bed ascends within about one-half of the volume of the coater and then spills over to become a descending bed in the other half.

5284676, Feb 8, 1994

Nov 18, 1991

7/793588

James A. Accuntius - Georgetown TX
David S. Wilde - Austin TX

Carbon Implants, Inc. - Austin TX

B05D 700

427 8

Precise control of pyrocarbon being coated upon an object in a fluidized particle bed is achieved by monitoring the pressure difference between a region above the bed and a region in the lower portion of or just below the bed. Measurement of such pressure differential has been found to be truly representative of bed size in such a coater, and bed size is recognized to be a most important factor in achieving the desired characteristics of the substance being deposited. By adjusting bed size in response to changes in the pressure difference being monitored, a substantially constant bed size is readily achieved; alternatively, the pressure difference can be caused to gradually change in accord with a predetermined program. In either instance, adjustments are effected by adding additional particles to the bed or by changing the rate at which particles are withdrawn, and precise coating characteristics, e. g. thicknesses within very close tolerances, are achievable.

5332337, Jul 26, 1994

Jan 14, 1992

7/821472

David S. Wilde - Austin TX
Billie F. Hightower - Austin TX
James A. Accuntius - Georgetown TX

Carbon Implants, Inc. - Austin TX

B65G 5366

406 24

A particle feeding device and method for fluidized bed coaters that has no moving parts. It preferably provides for constant flow of purge gas into the fluidized bed coater and has a feedback control means for monitoring and precisely controlling the flow of particles into the coater. The particle feeding device includes a supply of granular material in communication with a generally horizontal passageway and a delivery conduit for feeding granular material into a desired location, such as a fluidized bed coater. The amount of granular material remaining in the supply is periodically determined and pulses of gas are periodically discharged through said generally horizontal passageway so as to blow granular material into said delivery conduit in a manner so as to feed the precise amount of granular material for predetermined periods of time.

5328713, Jul 12, 1994

Mar 16, 1993

8/032627

Michael R. Emken - Austin TX
James A. Accuntius - Georgetown TX
David S. Wilde - Austin TX

Carbon Implants, Inc. - Austin TX

C23C 1652

427 8

Precise control of pyrocarbon being coated upon an object in a fluidized particle bed is achieved by monitoring the weight change of the fluidized particle bed over a period of time. Measurement of such weight change is truly representative of bed size in such a coater, which is a most important factor in achieving the desired characteristics of the pyrocarbon being deposited. By monitoring the bed size by repeatedly determining such changes in the weight, compensating adjustments are made by either adding additional particles to the bed or by changing the rate at which particles are withdrawn so that precise coating characteristics are achieved, and coatings can be deposited within very close thickness tolerances.

2005024, Nov 3, 2005

Dec 20, 2004

11/018559

Jack Bokros - Austin TX, US
Robert More - Austin TX, US
James Accuntius - Georgetown TX, US

Medical Carbon Research Institute - Austin TX

A61F002/28

623023600, 623901000, 427002260

A bone implant () comprises a body formed of an articulated open cell structure of a lightweight material, the surfaces of which structure are covered with a thin metal layer. A layer of biocompatible pyrocarbon coating is applied to the metal-coated structure so as to cover the entire structure and provide a dense, nonporous, biocompatible layer. Pyrocarbon is then selectively removed from portions () of the surface of the body to expose sections of the original surface which lead to regions of interconnected channels into which bone and tissue ingrowth are promoted while end regions () and () remain totally covered with such pyrocarbon.

5677061, Oct 14, 1997

Jan 16, 1996

8/587320

John L. Ely - Austin TX
Axel D. Haubold - Liberty Hill TX
Michael R. Emken - Austin TX
James A. Accuntius - Georgetown TX

Medtronic Carbon Implants, Inc. - Austin TX

B32B 900, C01B 3100

428408

Pure unalloyed pyrocarbons having wear resistance suitable for use in pyrocarbon-coated heart valve components and having mechanical properties, such as flexural strength and toughness, superior to commercial silicon-alloyed pyrocarbons are deposited in fluidized bed coaters. Coating conditions are carefully controlled so as to maintain a precise bed size within a defined coating enclosure which will assure a substantially constant surface deposition temperature that in turn assures deposition of homogenous unalloyed pyrocarbons having these improved mechanical properties.

5514410, May 7, 1996

Sep 8, 1994

8/303064

John L. Ely - Austin TX
Axel D. Haubold - Liberty Hill TX
Michael R. Emken - Austin TX
James A. Accuntius - Georgetown TX

Carbon Implants, Inc. - Austin TX

B05D 724, B05D 302, B05D 304

427 224

Pure unalloyed pyrocarbons having wear resistance suitable for use in pyrocarbon-coated heart valve components and having mechanical properties, such as flexural strength and toughness, superior to commercial silicon-alloyed pyrocarbons are deposited in fluidized bed coaters. Coating conditions are carefully controlled so as to maintain a precise bed size within a defined coating enclosure which will assure a substantially constant surface deposition temperature that in turn assures deposition of homogenous unalloyed pyrocarbons having these improved mechanical properties.