Richard G Dunn

US Patent:

44696710, Sep 4, 1984

Filed:

Feb 22, 1983

Appl. No.:

6/468436

Inventors:

Ronald E. Zimmerman - Danville IN
Philip J. Burck - Indianapolis IN
Richard L. Dunn - Birmingham AL

Assignee:

Eli Lilly and Company - Indianapolis IN

International Classification:

A61K 900
A61K 924

US Classification:

424 16

Abstract:

A contraceptive device for intravaginal use comprising a bioinsoluble, biocompatible polyurethane and an acrosin inhibitor.

US Patent:

46557776, Apr 7, 1987

Filed:

Dec 19, 1983

Appl. No.:

6/563191

Inventors:

Richard L. Dunn - Birmingham AL
Robert A. Casper - Birmingham AL

Assignee:

Southern Research Institute - Birmingham AL

International Classification:

A61F 100

US Classification:

623 16

Abstract:

Method of producing biodegradable prostheses comprising a composite of resorbable fibers reinforcing a biodegradable polymer matrix and the use thereof in medical applications such as bone plates and other orthopedic devices. The fibers include ceramic powders,. beta. -TCP and CaAl and a biodegradable glass, CMP.

US Patent:

56327277, May 27, 1997

Filed:

Jun 7, 1995

Appl. No.:

8/487547

Inventors:

Arthur J. Tipton - Birmingham AL
Shawn M. Fujita - Amsterdam, NL
Richard L. Dunn - Fort Collins CO

Assignee:

Atrix Laboratories, Inc. - Ft. Collins CO

International Classification:

A61F 1300

US Classification:

602 47

Abstract:

The invention is directed to a biodegradable film dressing with or without additional therapeutic agents, an apparatus for spray delivery and a method for formation of the film dressing on a human or animal tissue. The film dressing is formed from a liquid composition of at least one biodegradable/bioerodible thermoplastic polymer in a pharmaceutically acceptable solvent. The spray apparatus includes a vessel containing the liquid composition with a dispensing means. The film is formed by dispensing, preferably by spraying, the liquid composition onto a tissue site and contacting the liquid composition with an aqueous based fluid to coagulate or solidify the film onto the human or animal tissue. The biodegradable film can be used to protect and to promote healing of injured tissue and/or to deliver biologically active agents.

US Patent:

47310847, Mar 15, 1988

Filed:

Mar 14, 1986

Appl. No.:

6/840298

Inventors:

Richard L. Dunn - Birmingham AL
Danny H. Lewis - Hartselle AL
Thomas W. Sander - Memphis TN
Richard W. Treharne - Memphis TN

Assignee:

Richards Medical Company - Memphis TN

International Classification:

A61F 208

US Classification:

623 13

Abstract:

A nonaugmented prosthetic ligament for permanently replacing a natural ligament spanning first and second body members, such as the femur and tibia includes a load bearing member formed from a plurality of biocompatible polyolefin fibers positioned at angles of from 0. degree. to 55. degree. relative to the longitudinal axis of the load bearing member. Each fiber is less than 100 microns in diameter and has a tensile strength greater than or equal to about 50,000 psi. The load bearing member may be used alone or may be formed into a hollow braid having a core disposed within the hollow portion of the braid to provide shape for the load bearing member. A sheath may be friction fit or molded onto the exterior of the load bearing member to prevent abrasion of the fibers.

US Patent:

47908505, Dec 13, 1988

Filed:

Jun 22, 1987

Appl. No.:

7/064634

Inventors:

Richard L. Dunn - Birmingham AL
Danny H. Lewis - Hartselle AL
Thomas W. Sander - Memphis TN
James A. Davidson - Germantown TN
Neil B. Beals - Memphis TN
Yancy L. Gill - Smyrna GA

Assignee:

Richards Medical Company - Memphis TN

International Classification:

A61F 208

US Classification:

623 13

Abstract:

A prosthetic ligament assembly includes a nonaugmented prosthetic ligament for permanently replacing a natural ligament spanning first and second body members, such as the femur and tibia, and a bone screw adapted for tensioning the prosthetic ligament during implantation. The prosthetic ligament includes a load bearing member intertwined into a plain braid from a plurality of biocompatible, high strength, ultra high molecular weight polyethylene yarns. Each yarn includes at least fifty fibers and has a tensile strength greater than or equal to about 100,000 psi. The load bearing member has a gage section and a loop at each end thereof for anchoring the load bearing member to the body members. The load bearing member is preloaded to remove slack therefrom. The load bearing member may be used alone or may be formed into a hollow braid having a core disposed within the hollow portion of the braid to permit radiographic visualization of the prosthetic ligament.

US Patent:

50858661, Feb 4, 1992

Filed:

Dec 2, 1988

Appl. No.:

7/279216

Inventors:

Donald R. Cowsar - Birmingham AL
Richard L. Dunn - Fort Collins CO
Thomas J. Laughlin - Germantown TN

Assignee:

Southern Research Institute - Birmingham AL

International Classification:

A61K 914

US Classification:

424481

Abstract:

An improved method of producing a reservoir device having a rate-controlling membrane and zero-order (constant) release of an agent is provided. A core is sprayed with a solution having a polymer and a solvent, the solvent having a first component which is a rapidly evaporating, low-boiling-point first solvent and a slowly evaporating, high-boiling-point second solvent.

US Patent:

47846992, Nov 15, 1988

Filed:

Apr 8, 1987

Appl. No.:

7/036035

Inventors:

Donald R. Cowsar - Birmingham AL
Richard L. Dunn - Birmingham AL
Robert A. Casper - Alpharetta GA

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

B08B 500

US Classification:

134 42

Abstract:

The invention provides a process for decontaminating military nerve agents and blister agents. The process involves contacting the nerve agent and blister agent, particularly clothing and other items contaminated therewith, with gaseous ozone or chlorine dioxide, whereby the agents are oxidized to non-toxic products and thereby decontaminated rapidly, e. g. within a few minutes. The treatment with ozone or chlorine dioxide does not seriously affect the mechanical properties of the contaminated materials, such as fabrics.

US Patent:

48419680, Jun 27, 1989

Filed:

Sep 26, 1986

Appl. No.:

6/912400

Inventors:

Richard L. Dunn - Birmingham AL
John W. Gibson - Kingsport TN
Carlton A. Eddy - San Antonio TX
Leonard E. Laufe - San Antonio TX

Assignee:

Southern Research Institute - Birmingham AL
Texas Health Science Center - San Antonio TX

International Classification:

A61L 1700

US Classification:

1283355

Abstract:

The controlled first-order release of either an antithrombotic or thrombolytic agent from a sutures at an anastomosis site is disclosed which prevents postoperative thrombosis and improves vascular patency in animals. A suitable polymer, such as polycaprolactone, is blended with prostacyclin or analogues of prostacyclin to form the suture material.