Dear Mr. Templeton,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located a record series titled Opinions, 1923 - 1925 in the Records of International Conferences, Commissions, and Expositions (Record Group 43), which consists of consists of opinions of the Mixed Claims Commission set up between the United States and Germany. We also located 72 record series in Records of Boundary and Claims Commissions and Arbitrations, (Record Group 76) relating to the Mixed Claims Commission, United States and Germany. These records are the custody of the National Archives at College Park - Textual Reference (RDT2). To access these records please email RDT2 at Archives2reference@nara.gov.
We also searched the Reports of International Arbitral Awards on the website of the United Nation Office of Legal Affairs and located information relating to the Mixed Claims Commission (United States and Germany) in Volume VII and Volume VIII. Volume VIII mentions a DuPont factory in Hopewell, Virginia on pages 311 through 312.
We hope this information is helpful. Best of luck with your research!