DE501725C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for refining oils derived from coal
Assignee: FRITZ HOFMANN DR
•
Filing: 1927-06-26
•
Granted: 1930-07-04
•
Expires: 1947-06-26
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 16:44
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/02; C10G17/04; C10G17/07; C10C; C10C1/00; C10C1/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.