Sarah D Shepherd

US Patent:

20190031951, Jan 31, 2019

Filed:

Jan 17, 2017

Appl. No.:

16/071024

Inventors:

- Research Triangle Park NC, US
Ginger Denison Rothrock - Cary NC, US
Chasity Antoninette Norton - Roxboro NC, US
Sarah Dorothy Shepherd - Raleigh NC, US
Nicolas Daniel Huffman - Raleigh NC, US
Jeffrey Brent Mecham - Raleigh NC, US

International Classification:

C09K 8/92
C09K 8/70

Abstract:

The present disclosure relates to delivery and release systems wherein a plurality of particles is provided, and the particles are formed of a vehicle component and a cargo component. The systems and methods particularly can be useful in delivery of various chemicals to a petroleum reservoir. The vehicle component can undergo a change in situ such that at least a portion of the cargo component is released.

US Patent:

20180325781, Nov 15, 2018

Filed:

Mar 12, 2018

Appl. No.:

15/918026

Inventors:

- Research Triangle Park NC, US
- Chapel Hill NC, US
Sarah Dorothy Shepherd - Raleigh NC, US
Sandra Cordel O'Buckley - Durham NC, US
Andrea Gail Neely - Durham NC, US

Assignee:

Research Triangle Institute - Research Triangle Park NC
The University of North Carolina at Chapel Hill - Chapel Hill NC

International Classification:

A61K 6/00
A61K 9/16
A61K 47/42
A61K 9/00

Abstract:

The disclosure provides biocompatible dental material that is moldable and biodegradable and provides sustained and/or controlled delivery of one or more local anesthetics within a dental cavity or space. Such dental material is customizable for the size and shape needed for a particular patient or particular application. The dental material may also provide customizable sustained and/or controlled delivery of one or more local anesthetics.

US Patent:

20160017215, Jan 21, 2016

Filed:

Jul 17, 2014

Appl. No.:

14/333879

Inventors:

- Houston TX, US
- Research Triangle Park NC, US
Leah M. Johnson - Durham NC, US
Sarah Shepherd - Raleigh NC, US

International Classification:

C09K 8/88
E21B 43/25
C09K 8/82

Abstract:

A polymer-encapsulated mineral acid solution and a method for forming the polymer-encapsulated mineral acid solution. Introducing a strong mineral acid solution to a monomer solution occurs such that a primary emulsion that is a water-in-oil type emulsion forms. Introducing the primary emulsion to a second aqueous solution forms a secondary emulsion that is a water-in-oil-in-water type double emulsion. The monomer in the secondary emulsion is cured such a polymerized shell forms that encapsulates the strong mineral acid solution and forms the capsule. The strong mineral acid solution has up to 30 wt. % strong mineral acid. A method of stimulating a hydrocarbon-bearing formation using the polymer-encapsulated mineral acid solution includes introducing a capsule suspension into a fissure in the hydrocarbon-bearing formation to be stimulated through a face in a well bore. The capsule is maintained within the fissure until the polymer shell degrades.