Richard G Oliver

US Patent:

20130204355, Aug 8, 2013

Filed:

Feb 11, 2011

Appl. No.:

13/577974

Inventors:

Helmut Goldmann - Kassel, DE
Dennis Langanke - Kassel, DE
Richard W. Oliver - Westford MA, US

Assignee:

SPIRE BIOMEDICAL - Bedford MA
AESCULAP AG - Tuttlingen/Donau

International Classification:

A61L 27/28
A61F 2/06

US Classification:

623 139

Abstract:

A medical device includes a porous article of expanded polytetrafluoroethylene (ePTFE) having a microstructure of nodes interconnected by fibrils, and a coating including an antimicrobial material at the surface of the porous article, wherein the microstructure at a surface of the porous article is only partially coated with the antimicrobial material.

US Patent:

49680064, Nov 6, 1990

Filed:

Jul 21, 1989

Appl. No.:

7/383927

Inventors:

Richard W. Oliver - Acton MA

Assignee:

Spire Corporation - Bedford MA

International Classification:

C23C 1450

US Classification:

266 78

Abstract:

An improved method and an apparatus for the ion implantation of spherical surfaces are disclosed. The method includes the provision of a revised fixture by which a plurality of spherical workpieces are presented to a large area ion beam in a way that their entire respective spherical surfaces are uniformly ion implanted to improve their surface characteristics. The fixture includes a disc mounted for motion about two axes normal to each other, a plurality of holes formed in a the disc loosely to accommodate therein a plurality of spherical workpieces, each of the plurality of holes formed with a spherical bottom and having a cleaning orifice, cooling means disposed on one side of the disc, a thermocouple operatively mounted in association with the disc, and a cover plate mounted on a second side of the disc and provided with a plurality of apertures concentric with the plurality of holes formed in the disc. The method includes randomization of the motion about one of the two axes of motion by interrupting this motion for about 15 to about 30 seconds once every 90 to about 120 seconds.

US Patent:

50790323, Jan 7, 1992

Filed:

Jul 25, 1990

Appl. No.:

7/558084

Inventors:

Richard W. Oliver - Acton MA

Assignee:

Spire Corporation - Bedford MA

International Classification:

B05D 306

US Classification:

427 38

Abstract:

An improved method and an apparatus for the ion implantation of spherical surfaces are disclosed. The method includes the provision of a revised fixture by which a plurality of spherical workpieces are presented to a large area ion beam in a way that their entire respective spherical surfaces are uniformly ion implanted to improve their surface characteristics. The fixture includes a disc mounted for motion about two axes normal to each other, a plurality of holes formed in a the disc loosely to accommodate therein a plurality of spherical workpieces, each of the plurality of holes formed with a spherical bottom and having a cleaning orifice, cooling means disposed on one side of the disc, a thermocouple operatively mounted in association with the disc, and a cover plate mounted on a second side of the disc and provided with a plurality of apertures concentric with the plurality of holes formed in the disc. The method includes randomization of the motion about one of the two axes of motion by interrupting this motion for about 15 to about 30 seconds once every 90 to about 120 seconds.