Patent US4995867A successfully refreshed from Google Patents.
Patent DE17371C successfully refreshed from Google Patents.
DE17371C
Active / In Force
DE
Innovations in the FREYTAG process patented under P. R. 9969 for the separation of sulfuric acid from combustion or roasting gases by sulfuric acid. (Improvement on P. R. 9969.)
Assignee: R. HASENCLEVER in Aachen
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Filing: —
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Granted: —
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Abstract
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Inventors
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Bibliographic Details
Application Number
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Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-02 07:14
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/60
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