Revelation Biosciences(REVB) - 2020 Q4 - Annual Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the year ended December 31, 2020 Commission File Number 001-39603 PETRAACQUISITION INC. (Exact name of registrant as specified in its charter) | Delaware | 84-3898466 | | --- | --- | | (State or Other Jurisdiction | (I.R.S. Employer | | of Incorporation) | Identification No.) | | 5 West 21st Street | | | New York, NY | 10010 | | (Address ...