1. Chinese First Office Action (with English translation) dated Nov. 23, 2021 for Chinese Patent Application No. 201880084615.3. cited by applicant
2. Extended European Search Report dated Jul. 9, 2021 for European Application No. 18877318.8. cited by applicant
3. PCT International Search Report & Written Opinion dated Apr. 12, 2019 PCT Application No. PCT/US2018/061474. cited by applicant
4. Geibler et al., "Hydrogen production via methane pyrolysis in a liquid metal bubble column reactor with a packed bed"; Chemical Engineering Journal, vol. 299, Sep. 1, 2016, pp. 1-19. cited by applicant
5. Second Office Action dated Jul. 15, 2022 for Chinese Application No. 201880084615.3. cited by applicant