John Harrelson, Ph.D.

John Harrelson is a member of Flaster Greenberg’s Intellectual Property Department and Patent Practice Group. He has more than 20 years of experience in worldwide patent portfolio management, drafting, and prosecuting patent applications across various technical fields, including chemical, pharmaceutical, biotechnology, and nanotechnology.

He focuses his practice on assisting clients in the preparation and prosecution of patent applications, freedom to operate studies, due diligence, and intellectual property strategy in subject matters such as small molecule organic chemistry, polymer chemistry, biochemistry, apparel, textile fibers, industrial fibers, chemical process, alternate energy, fuel cells, batteries, nucleic acids, imaging agents, adhesives, inks/pigments, nanotechnology, metallic and organometallic catalysts, medical devices, consumer products, LEDs, magnets, computer chips, and display systems.

Prior to becoming an attorney, John developed an intimate understanding of a company's business as an in-house intellectual property manager and senior research chemist at DuPont.

Professional Affiliations

Pennsylvania Bar Association
Florida Bar Association
American Bar Association
American Chemical Society

Reported Patents

US-B-9,150,605, Ionis Pharmaceuticals, Compositions Comprising Alternating 2’-Modified Nucleosides for Use in Gene Modulation
US-B-7,157,492, Wyeth Pharmaceuticals, Dibenzo Chromene Derivatives and Their Use as ER-Beta Selective Ligands
US-B-7,157,491, Wyeth Pharmaceuticals, Aryl-Carbaldehyde Oxime Derivatives and Their Use as Estrogenic Agents
US-B-10,426,158, CytoSorbents, Polymeric Sorbent for Removal of Impurities from Whole Blood and Blood Products.
US-B-9,931,457, CytoSorbents, Compositions, and Methods Useful in Selectively Modifying the Internal and External Surfaces of Porous Polymer Beads.
US-B-9,931,357, CytoSorbents, Use of Gastrointestinally Administered Porous Enteron Sorbent Polymers to Prevent or Treat Radiation-Induced Mucositis, Esophagitis, Enteritis, Colitis, and Gastrointestinal Acute Radiation Syndrome.
US-B-7,682,603, University of Pennsylvania, Polymersomes Incorporating Highly Emissive Probes
US 9,777,034, University of Pennsylvania, Modular Synthesis of Amphiphilic Janus Glycodendrimers and their Self-Assembly into Glycodenrimersomes.
US-B-8,080,297, Nanopack, Inc., Barrier Coatings For Films And Structures
US-B-8,066,770, DePuy Products, Inc., Sintered Coatings for Implantable Prostheses
US-B-8,424,183, DePuy Products, Inc., Porous Titanium Femoral Sleeves and their Use in Revision Knee Surgery
US-B-10,581,103, Lockheed Martin Energy, Flow Battery Balancing Cells Having a Bipolar Membrane and Methods for Use Thereof
US-B-9,328,238, Sabic, Wear Resistant Compositions with Low Particulate Contamination and Method of Making Those Compositions.
US-B-8,038,926, Drexel University, Method for Making Carbon Nanotubes with Embedded Nanoparticles
US-B-9,469,922, E.I. DuPont de Nemours and Company, Method for Removing Sulfur from Fiber Using a Weak Base
US-B-7,888,457, E.I. DuPont de Nemours and Company, Process for Removing Phosphorous from a Fiber or Yarn
US-B-7,816,016, E.I. DuPont de Nemours and Company, Electroluminescent Iridium Compounds and Devices Made Therefrom
US 20090311935, E.I. DuPont de Nemours and Company, Polyarenazole Microfilaments and Process for Making Same
US-B-7,842,758, University of Pennsylvania, Novel Conjugated Materials Featuring Proquinoidal Units
US-B-8,673,806, W.R. Grace, Catalyst on Silica Clad Alumina Support
WO2015079385, Sabic, High Modulus Laser Direct Structuring
Polycarbonate Composites with Enhanced Plating Performance and Broad Laser Window by Reflection Additives.
US-B-8,450,427, University of Pennsylvania, Living Radical Polymerization of Activated and Nonactivated Monomers Containing Electron-Withdrawing Side Groups.
WO2015109135, QED Labs, Articles with Improved Flame Retardancy and/or Melt Dripping Properties.

Articles & Alerts

Filing a Patent: A Global Versus a National Approach
LinkedIn
(September 22, 2021)
Key Considerations for Navigating the Patent
Publish or Trade Secret Decision LinkedIn
(July 28, 2021)
Dippin’ Dots and Weasel Words: “Comprising the Steps of” Might Not Be as Broad as You Think
INTELL. PROP. TODAY
(June 2007)
A Lesson on Method of Treatment Patent Claim Preambles
INTELL. PROP. TODAY
(July 2006)
Pharmaceutical Patents, and the HIV/AIDS Crisis: Finding the Proper Balance Between Intellectual Property Rights and Compassion
7 WIDENER L. SYM. J.
(2001)
Hydrocyanation, AQUEOUS-PHASE ORGANOMET

(1998)
Homolytic Bond Dissociation Energies of Acidic C-H Bonds Activated by One or Two Electron Acceptors

(1991)
The Role of Single Electron Transfer in SN2-Type Substitution Reactions of Anions with Alkyl Halides
54 J. ORG. CHEM. 4893-98
(1989)
Homolytic Bond Dissociation Energies of the alpha-C-H Bond of Ketones in DMSO
68 CAN. J. CHEM. 1714-18
(1990)
Homolytic Bond Dissociation Energies for the Cleavage of alpha N-H Bonds in Carboximides, Sulfoxamides, and their Derivatives. The Question of Synergism in Nitrogen Centered Radicals
55 J. ORG. CHEM. 3337-41
(1990)
Oxidation Potentials of Carbanions and Homolytic Bond Dissociation Energies of their Conjugate Acids
54 J. ORG. CHEM. 3101-05
(1989)
Steric and Electrochemical Effects on Rates of SET and SN2 reactions of 9- Dialkylaminofluorenide Ions with Alkyl Halides
111 J. AM. CHEM. SOC. 1052-57
(1989)
, Acidities of Benzyl Phenyl Sulfones and the Corresponding Radical Cations. Homolytic Bond Dissociation Energies (BDEs) of alpha-C-H Bonds in Benzyl Phenyl Sulfones
1 J. PHYS. ORG. CHEM. 225-41
(1988)
The Relative Ease of Removing a Proton, a Hydrogen Atom, or an Electron from Carboxamides versus Thiocarboxamides
110 J. AM. CHEM. SOC. 5903-04
(1988)
Homolytic Bond Dissociation Energies in Solution from Equilibrium Acidity and Electrochemical Data
110 J. AM. CHEM. SOC. 1229-31
(1988)
Hybrid-Single-Electron-Transfer-SN2 Reactions
109 J. AM. CHEM. SOC. 8112-13
(1987)
A Spectacular Example of the Importance of Rotational Barriers-- The Ionization of Meldrum's Acid
109 J. AM. CHEM. SOC. 809-12
(1987)
, Ion-Pairing and Reactivity of Enolate Anions. 8. Enolization, Homohydrogen Bonding and the Correlation of pKas with Rate of Alkylation and Redox Potentials for Beta-Di- and Tricarbonyl Compounds in Dimethyl Sulfoxide
117 GAZZ. CHIM. ITAL. 237-43
(1987)
Thermodynamic Acidity of 6,6-Dimethylfulvene and 6-Phenyl-6-Methylfulvene in Dimethyl Sulfoxide
J. CHEM. SOC., CHEM. COMMUN. 116-17
(1987)
S. L. Schilling & J. A. Harrelson, Ion-Pairing and Reactivity of Enolate Anions. 5. Thermodynamics of Ionization of Beta-Di- and Tricarbonyl Compounds in Dimethyl Sulfoxide and Ion-Pairing of their Salts
106 J. AM. CHEM. SOC. 6759-67
(1984)

Profile
Articles & Alerts

Practice Areas

Admissions

Pennsylvania
Florida
U.S. District Court for the Eastern District of Pennsylvania
United States Patent and Trademark Association

Education

Widener University, J.D., Magna Cum Laude
- Widener Law Symposium Journal, Bluebook Editor
Duke University, Ph.D. in Organic Chemistry
University of North Carolina at Greensboro, M.S. in Chemistry
University of North Carolina at Chapel Hill, B.S. in Chemistry