Richard Scot Sinclair

US Patent:

6740731, May 25, 2004

Filed:

Feb 12, 2001

Appl. No.:

09/782183

Inventors:

Donald M. Bigg - Columbus OH
Richard G. Sinclair - Columbus OH
Edward S. Lipinsky - Worthington OH
John H. Litchfield - Worthington OH
Billy R. Allen - Greenwood IN

Assignee:

Cargill Dow Polymers LLC - Midland MI

International Classification:

C08G 6308

US Classification:

528354, 528355, 528357, 528359, 528361, 528363, 528480, 528486, 525411, 525413, 525415, 524306, 524310, 524315, 524317, 524320, 523124, 523125, 523500, 428480, 428364, 4284111, 521 98, 521121, 521100, 264212

Abstract:

The present invention is directed to a method for reducing waste accumulation by using an environmentally degradable disposable material. The disposable material, which includes a hydroxycarboxylic acid-containing polymer, degrades hydrolytically during operative and disposal stages in a controlled manner such that the disposal degradation rate of the material is accelerated relative to the operative degradation rate of the material.

US Patent:

54243467, Jun 13, 1995

Filed:

May 9, 1994

Appl. No.:

8/240085

Inventors:

Richard G. Sinclair - Columbus OH

Assignee:

Ecopol, LLC - Golden CO

International Classification:

C08L 6704

US Classification:

524108

Abstract:

The biodegradable polymer comprises polymerized lactic acid units of the structure: ##STR1## where n is an integer between 450 and 10,000 and the alpha carbon is a mixture of L- and D-configurations with a preponderance of either D- or L-units, wherein the polymer is suitable for replacement of polystyrene; the biodegradable composition also comprises blends of a physical mixture of polymerized lactic acid units of the formula I, where n is an integer between 450 and 10,000 and the alpha carbon is a mixture of L- and D-configurations with a preponderance of either D- or L-units, and a homopolymer of poly(D-lactic acid) or poly(L-lactic acid), and plasticizers that provide unique properties when intimately dispersed.

US Patent:

47169648, Jan 5, 1988

Filed:

Dec 10, 1986

Appl. No.:

6/940193

Inventors:

Steven R. Erbstoesser - Missouri City TX
Claude E. Cooke - Houston TX
Richard G. Sinclair - Columbus OH
Michael M. Epstein - Columbus OH

Assignee:

Exxon Production Research Company - Houston TX

International Classification:

E21B 3310
E21B 4325
E21B 4326

US Classification:

166284

Abstract:

Plugging perforations in casing in a wellbore penetrating a subterranean formation using degradale ball sealers. The ball sealer used is composed of a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. After the polymer degrades, the flow through the perforation returns to substantially its initial value.

US Patent:

50856294, Feb 4, 1992

Filed:

Sep 27, 1989

Appl. No.:

7/414651

Inventors:

Jay Goldberg - Northbrook IL
Richard Sinclair - Columbus OH

Assignee:

Medical Engineering Corporation - DE

International Classification:

A61M 500
A61F 204

US Classification:

604 8

Abstract:

A biodegradable, biocompatible, resorbable infusion stent comprising a terpolymer of: (a) L(-)lactide, (b) glycolide, and (c) epsilon-caprolactone. This invention includes a method for treating ureteral obstructions or impairments by utilizing a biodegradable, biocompatible, resorbable infusion stent, and a method for controlling the speed of resorption of the stent.

US Patent:

45266956, Jul 2, 1985

Filed:

Feb 4, 1983

Appl. No.:

6/464084

Inventors:

Steven R. Erbstoesser - Missouri City TX
Claude E. Cooke - Houston TX
Richard G. Sinclair - Columbus OH
Michael M. Epstein - Columbus OH

Assignee:

Exxon Production Research Co. - Houston TX

International Classification:

E21B 33138

US Classification:

252 855R

Abstract:

The present invention relates generally to the composition and method for reducing the permeability of subterranean formations penetrated by a wellbore. The composition of the present invention comprises a wellbore fluid having dispersed therein a fluid loss control agent comprising a polyester polymer which is substantially insoluble in the wellbore fluid. The polymer degrades in the presence of water at an elevated temperature to form small molecules which are soluble in a fluid in the subterranean formation. The method of the present invention comprises reducing the permeability of subterranean formations penetrated by a wellbore by placing the composition of the present invention down the wellbore.

US Patent:

54441137, Aug 22, 1995

Filed:

Sep 29, 1993

Appl. No.:

8/128520

Inventors:

Richard G. Sinclair - Columbus OH
Edward S. Lipinsky - Worthington OH
James D. Browning - Columbus OH
Donald Bigg - Columbus OH
Thomas A. Rogers - Golden CO

Assignee:

Ecopol, LLC - Golden CO

International Classification:

C08K 510

US Classification:

524306

Abstract:

Disclosed are products made of degradable materials which include a hydrolytically degradable polymer. The degradable materials can be internally or externally modified. The internally modified polymer composition has polymers modified by the use of comonomers having a relatively high molecular weight. The externally modified polymer composition includes a modifier, wherein the modifier is compatible with the polymer and the modifier is nontoxic, nonvolatile and nonfugitive. The various degradable materials include films, fibers, extruded and molded products, laminates, foams, powders, nonwovens, adhesives and coatings. The disclosed materials are particularly useful for the production of a variety of products in high volumes which are suitable for recycling after use or which are discarded into the environment in large volumes.

US Patent:

53328396, Jul 26, 1994

Filed:

Sep 18, 1990

Appl. No.:

7/584466

Inventors:

Herman P. Benecke - Columbus OH
Richard A. Markle - Columbus OH
Richard G. Sinclair - Columbus OH

Assignee:

BioPak Technology, Ltd. - Golden CO

International Classification:

C07D31912

US Classification:

549274

Abstract:

The present invention is directed to a method for making lactide from aqueous lactic acid. The invention method comprises converting feed aqueous lactic acid to its vapor phase. The feed vapors then are passed through a reactor maintained at elevated temperature and in which optionally is disposed an alumina catalyst. Withdrawn from the reactor is product lactide, water, and unreacted lactic acid which are subjected to separation for recovery of the lactide product. The separated unreacted lactic acid is eligible for readmission to the process for making additional lactide. This cyclic process embodiment of the present invention comprises the steps of passing make-up aqueous lactic acid feed into a vaporization zone along with unreacted aqueous lactic acid filtrate from another step of the process and therein forming aqueous lactic acid feed vapors. The thus-generated vapors that are passed through a vapor phase reaction zone held at elevated temperature for forming lactide therein. Lactide as a solid is separated from unreacted aqueous lactic acid filtrate; and the filtrate is passed into the vaporization zone in the initial step of the process.

US Patent:

46339299, Jan 6, 1987

Filed:

Oct 16, 1985

Appl. No.:

6/787859

Inventors:

Joseph G. Santangelo - Allentown PA
James J. Weber - Allentown PA
Richard G. Sinclair - Columbus OH
Richard D. Tenaglia - Columbus OH

Assignee:

Air Products and Chemicals, Inc. - Allentown PA

International Classification:

B22C 904
B22C 702

US Classification:

164 34

Abstract:

Metal castings having reduced residual carbon ash and surface flaws are produced by an evaporative pattern casting process, in which an organic foam pattern is vaporized upon contact with a molten metal leaving a metal replica of the pattern. The organic foam used in this process comprises a polymer formed by polymerizing CO. sub. 2 with one or more oxirane compounds.