Zachary Schaefer, Ph.D.


Title: Patent Agent
Qualifications: U.S. Patent Agent

Location: Houston


Dr. Schaefer assists with the drafting and prosecution of foreign and domestic patents in the fields of chemistry, materials, science, oilfield technologies, and nanotechnology.


Dr. Schaefer is skilled in the drafting and prosecution of patents relating to specialized drilling fluids, downhole tools (e.g., drill bits, cutting elements, etc.) and their implementation in the field, among other oilfield technologies.  Dr. Schaefer’s technical background lies primarily in the synthesis, characterization, and utilization of nanoparticles for complex problems.  Dr. Schaefer received his Ph.D. in Chemistry from The Pennsylvania State University, where his graduate dissertation detailed the low-temperature chemical synthesis of intermetallic, carbide, borocarbide, and carbonaceous nanoparticles.  He then worked as a Postdoctoral Research Associate in the Chemical Engineering Department at Rice University where he aided in the development of surfactant bi-layer coated carbon based nano-reporters for in-situ data collection and/or enhanced oil recovery in oilfields.


  • Ph.D., Chemistry, The Pennsylvania State University, (2011)
  • B.S., Chemistry, Texas Lutheran University, (2006)


  • United States Patent and Trademark Office


  • M.C.F. Soares, M.M. Viana, Z.L. Schaefer, V.S. Gangoli, Y. Cheng, V. Caliman, M.S. Wong, G.G. Silva, “Surface Modification of Carbon Black Nanoparticles by Dodecylamine: Thermal Stability and Phase Transfer in Brine Medium,” Carbon 2014, 72, 287-295
  • C.-C. Hwang, G. Ruan, L. Wang, H. Zheng, E.L.G. Samuel, C. Xiang, W. Lu, W. Kasper, K. Huang, Z. Peng, Z. Schaefer, A.T. Kan, A.A. Marti, M.S. Wong, M.B. Tomson, J.M. Tour, “Carbon-Based Nanoreporters Designed for Subsurface Hydrogen Sulfide Detection,” ACS Appl. Mater. Interfaces. 2014, 6, 7652-7658.
  • Z.L. Schaefer, K. Weeber, R. Misra, P. Schiffer, R.E. Schaak, “Bridging hcp-Ni and Ni3C via a Ni3C1-x Solid Solution: Tunable Composition and Magnetism in Colloidal Nickel Carbide Nanoparticles,” Chem. Mater. 201123, 2475-2480.
  • Z.L. Schaefer, M.L. Gross, M.A. Hickner, R.E. Schaak, “Uniform Hollow Carbon Shells: Nanostructured Graphitic Supports for Improved Oxygen-Reduction Catalysis,” Angew. Chem. Int. Ed. 201049, 7045-7048.
  • Z.L. Schaefer, D.D. Vaughn II, R.E. Schaak, “Solution Chemistry Synthesis, Morphology Studies, and Optical Properties of Five Distinct Nanocrystalline Au-Zn Intermetallic Compounds,” J. Alloys Compd. 2010490, 98-102.
  • Z.L. Schaefer, X. Ke, P. Schiffer, R.E. Schaak, “Direct Solution Synthesis, Reaction Pathway Studies, and Structural Characterization of Crystalline Ni3B Nanoparticles,” J. Phys. Chem. C 2008112, 19846-19851.


  • Provisional and Utility Patent Applications,” Z.L. Schaefer, 2014 ACS Southwest Regional Meeting, Fort Worth, TX, November 2014 (oral presentation).
  • “Solution Synthesis and Structural Investigation of Ni3C Nanoparticles,” Z.L. Schaefer, R.E. Schaak, 241st American Chemical Society National Meeting, Anaheim, CA, March 2011 (oral presentation).
  • “Direct Solution Synthesis of Ni3B Nanoparticles,” Z.L. Schaefer, R.E. Schaak, 236th American Chemical Society National Meeting, Philadelphia, PA, August 2008 (poster presentation).


  • American Chemical Society (ACS)