FR521891A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Process for the preparation of pyridic bases
Assignee: Hoechst AG
•
Filing: 1920-07-12
•
Granted: 1921-07-21
•
Expires: 1940-07-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-26 20:14
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/08; C07D213/09; C07D213/10
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.