the firm's post-grant practitioners are some of the most experienced in the country.

Chika (Teranishi) Iitoyo
Nanlin  Wang, Ph.D.
David M. Longo, Ph.D.
Jeffrey B. McIntyre
Long  Phan, Ph.D.
Carl E. Schlier
Craig R. Feinberg
Alec M. Royka
Colin B. Harris
Kevin Ross  Davis
Matthew H. Everhart, Ph.D.
Brian B. Darville
Edwin D. Garlepp
Yuki  Onoe
Arthur I. Neustadt
James R. Love
Robert T. Pous
Yuanyi (Alex) Zhang
Tia D. Fenton
Kevin L. Hartman, Ph.D.
Philippe J.C. Signore, Ph.D.
Bogdan A. Zinchenko
Robert  Tarcu
Norman F. Oblon
Soumya  Panda
Eckhard H. Kuesters
Jay E. Rowe, Jr., Ph.D.
Grace E. Kim
Kevin M. McKinley
Yorikatsu  Hohokabe, Ph.D.
Derek  Lightner, Ph.D.
Richard D. Kelly
Jenchieh (Joseph) Yuan
Ryan W. Smith
Frank J. West
Surinder  Sachar
Vincent K. Shier, Ph.D.
Steven B. Chang
Diane  Jones
Marina I. Miller, Ph.D.
Peifang  Tian, Ph.D.
Tao  Feng, Ph.D.
John F. Presper
Jianping (James)  Wu
Teddy S. Gron
Christopher  Ricciuti
John S. Kern
Christopher I. Donahue
Thomas M. Cunningham, Ph.D.
Sameer  Gokhale
Eric W. Schweibenz
Yin Y. Nelson, Ph.D.
Charles L. Gholz
Michael R. Casey, Ph.D.
Ching-Cheng (Tony)  Chang
Stefan Uwe  Koschmieder, Ph.D.
J. Derek  Mason, Ph.D., CLP
Maki  Saitoh
Alexander B. Englehart
Aldo  Martinez
Elissa L. Sanford
Robert W. Downs
Daniel J. Pereira, Ph.D.
Yanwen  Fei
Anna Z. Lloyd
Erik M. Stang, Ph.D.
Nicholas  Rosa, Ph.D.
John  Sipos
Stephen G. Baxter, Ph.D.
Johnny  Ma
Kurt M. Berger, Ph.D.
Kasumi  Kanetaka
Dale M. Shaw
Akihiro  Yamazaki
Andrew M. Ollis
Aristotelis M. Psitos


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Fast Facts

About Our

Law Firm

About Our Law Firm

Headquartered within steps of the USPTO with an affiliate office in Tokyo, Oblon is one of the largest law firms in the United States focused exclusively on intellectual property law.

Get to know our


Get to know our History

Norman Oblon with Stanley Fisher and Marvin Spivak launched what was to become Oblon, McClelland, Maier & Neustadt, LLP, one of the nation's leading full-service intellectual property law firms.

Our Local and

Global Reach

Our Local and Global Reach

Outside the US, we service companies based in Japan, France, Germany, Italy, Saudi Arabia, and farther corners of the world. Our culturally aware attorneys speak many languages, including Japanese, French, German, Mandarin, Korean, Russian, Arabic, Farsi, Chinese.

A few of our


A few of our ACCOLADES

Oblon's professionals provide industry-leading IP legal services to many of the world's most admired innovators and brands.




From the minute you walk through our doors, you'll become a valuable part of a team that fosters a culture of innovation, client service and collegiality.

A few ways to

GET In Touch

A few ways to GET In Touch
US Office

Telephone: 703-413-3000
Learn More +

Tokyo Office

Telephone: +81-3-6212-0550
Learn More +


Patent Forms

Downloadable Patent Forms

The United States Patent and Trademark Office (USPTO) issued final rules implementing the inventor's oath or declaration provisions of the America Invents Act (AIA) on August 14, 2012.

Erik M. Stang, Ph.D.

Erik M. Stang, Ph.D.

Patent Agent ∙ US Office
T: (703) 413-2728
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Erik M. Stang, Ph.D., is a registered patent agent in the firm’s Chemical Patent Prosecution group, focusing on patent preparation, patent prosecution, and providing technical consulting for domestic and international clients in a wide array of technical areas, including pharmaceuticals (small molecules and biologics), organic synthesis, catalysis, biotechnology, polymers, inks, and nanomaterials.

Prior to joining the firm in 2014, Dr. Stang worked as a Research Investigator in oncology chemistry drug discovery at Bristol-Myers Squibb where he worked on both early and late stage research programs in the cancer therapeutic area, including protein-protein interaction inhibitors and antibody-drug conjugates featuring a variety of payloads. These medicinal chemistry programs included small molecule, millamolecular, and biologic research areas.

 Dr. Stang completed his doctoral studies at the University of Illinois Urbana-Champaign. There, he developed and applied carbon-hydrogen activation reactions in complex molecule synthesis, including the synthesis of members of the erythronolide macrolide antibiotics and dehydrogentive Diels-Alder reactions.


  • University of Illinois Urbana-Champaign (Ph.D.)
    • Organic Chemistry
  • James Madison University (B.S., summa cum laude)
    • Chemistry


  • Registered to practice before the U.S. Patent and Trademark Office


  • Bristol-Myers Squibb Graduate Fellowship, 2010
  • R.C. Fuson Travel Award, 2010
  • Roche Excellence in Chemistry Award, 2009
  • Pfizer Graduate Fellowship, 2008
  • R.C. Fuson Graduate Fellowship, 2007
  • Roger Adams Graduate Fellowship, 2006
  • Pfizer Undergraduate Research Fellowship, 2005
  • American Institute of Chemists Award, 2005
  • National Science Foundation Research Experience for Undergraduates Fellowship, 2003



 Borzilleri, R.M.; Perez, H.L.; Stang, E.M; Kim, K.S. U.S. Patent No. 8,889,712 B2, November 18, 2014.

Kim, K.S.; Zhang, L.; Stang, E.M. U.S. Patent No. 9,637,518 B2, May 2, 2017.

Zhang, Y; Borzilleri, R.M.; Tebben, A.J.; Stang, E.M.; Donnell, A.F.; Schroeder, G.M.; Perez, H.L.; Wei, D.D. U.S. Patent No. 9,688,694 B2, June 27, 2017.

Borzilleri, R.M.; Kim, K.S.; Perez, H.L.; Stang, E.M.; Williams, D.K.; Zhang, L. U.S. Patent No. 9,783,573 B2, October 10, 2017.

Zhang, Y; Borzilleri, R.M.; Tebben, A.J.; Stang, E.M.; Donnell, A.F.; Schroeder, G.M.; Perez, H.L.; Wei, D.D. U.S. Patent No. 9,902,740 B2, February 27, 2018.



Stang, E.M.; White, M.C. “Total Synthesis and Study of 6-deoxyerythronolide B by Late-Stage C–H Oxidation.” Nature Chemistry, 2009, 1, 547-551.

Stang, E.M.; White, M.C. “On the Macrocyclization of the Erythromycin Core: Preorganization is Not Required.” Angewandte Chemie International Edition, 2011, 50, 2094-2097.

Stang, E.M.; White, M.C. “Molecular Complexity via C–H Activation: A Dehydrogenative Diels-Alder Reaction.” J. Am. Chem. Soc. 2011, 33, 14892-14895.

 Kim, K.S.; Zhang, L.; Williams, D.; Perez, H.L.; Stang, E.; Borzilleri, R.M.; Posy, S.; Lei, M.; Chaudhry, C.; Emanuel, S.; Talbot, R. “Discovery of tetrahydroisoquinoline-based bivalent heterodimeric IAP antagonists” Bioorg. & Med. Chem. Lett. 2014, 24, 5022-5029.

Donnell, A.F.; Zhang, Y.; Stang, E.M.; Wei, D.D.; Tebben, A.J.; Perez, H.L.; Schroeder, G.M.; Pan, C.; Rao, C.; Borzilleri, R.M.; Vite, G.D. Gangwar, S. “Macrocyclic pyrrolobenzodiazepine dimers as antibody-drug conjugate payloads” Bioorg. & Med. Chem. Lett. 2017, 27, 5267-5271.




“Engineering Payloads for Antibody-Drug Conjugates” Bristol-Myers Squibb Lawrenceville Discovery Chemistry Seminar Series, October 2013, Lawrenceville, NJ.

“C–H Oxidation Reactions in Complex Molecule Synthesis: Application and Development” Bristol-Myers Squibb Graduate Fellowship Award Symposium, April 2011, Lawrenceville, NJ.

“Total Synthesis and Study of 6-deoxyerythronolide B via Late-Stage C–H Oxidations” 59th Natural Products Gordon Research Conference, July 2010, Tilton, NH.

“Total Synthesis and Study of 6-deoxyerythronolide B via Late-Stage C–H Oxidations” 23rd Annual Allerton Research Conference, 2009, Monticello, IL.

 “Total Synthesis and Study of 6-deoxyerythronolide B via Late-Stage C–H Oxidations” Roche Symposium: Excellence in Chemistry, 2009, Nutley, NJ.

"Cyclopropane Fragmentation Strategies for the Assembly of Nitrogenous Heterocycles" ACS National Meeting, Chemical Education Session, August 28th 2005, Washington, DC.

"Cyclopropane Fragmentation Strategies for the Assembly of Nitrogenous Heterocycles" Pfizer Global Research & Development, Summer Undergraduate Research Fellowship Program, September 30, 2005, Groton, CT.

 “Synthesis of Complex Metal Oxides via Molten Hydroxide Fluxes” JMU National Science Foundation Research Experience for Undergraduates, August 5, 2004, Harrisonburg, VA.

Professional Affiliations

  • American Chemical Society