The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 2025
Filed:
May. 20, 2021
X-bow Launch Systems Inc., Albuquerque, NM (US);
Jason Hundley, Albuquerque, NM (US);
Mark Kaufman, Auburn, CA (US);
Michael Mcpherson, Socorro, NM (US);
Jillian Marsh, Austin, TX (US);
X-Bow Launch Systems Inc., Albuquerque, NM (US);
Abstract
A method for making a unitary fuel grain for use in a rocket motor or gas generator comprising forming a fuel grain coating substantially free of gas-permeable voids, forming a succession of additional coats of oxidizer depleted grain material substantially free of gas-permeable voids. The fuel grain is then deposited into a print bed along a predetermined distance in a direction primarily parallel to a rocket motor central axis, the fuel grain coating forming a rocket motor fuel grain having a pre-ignition segment and a post-ignition segment, wherein the passivated fuel grain coating of fuel grain material is continuously self-adhered during fuel grain material deposition, and wherein the fuel grain material comprises oxidizer depleted fuel grain material; and wherein the passivated fuel grain coating of fuel grain material forms a substantially circular pattern upon deposition, said substantially circular pattern having an outer shell with an undulating pattern.