Patent ID: 11958053
Assignee: THE GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF HOMELAND SECURITY
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 17:
18. The method of claim 12, wherein each wall of the pair of walls has a lower end that is spaced from the upper end along the vertical axis, wherein the base defines a respective receptacle that receives the lower end of each wall with an interference fit, the method further comprising:
inserting the lower end of each wall of the pair of walls into the respective receptacle of the base;
positioning the upper end of each wall of the pair of walls between the respective first downwardly extending projection and second downwardly extending projection at the respective end of the first end and second end of the first transverse member;
positioning the upper end of each wall of the pair of walls between the respective first downwardly extending projection and second downwardly extending projection at the respective end of the first end and second end of the second transverse member;
removing the upper end of each wall of the pair of walls from between the respective first downwardly extending projection and second downwardly extending projection at the respective end of the first end and second end of the first transverse member; and
removing the upper end of each wall of the pair of walls from between the respective first downwardly extending projection and second downwardly extending projection at the respective end of the first end and second end of the second transverse member.