Patent FR816448A successfully refreshed from Google Patents.
FR816448A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Manufacturing process of synthetic base exchange resins
Assignee: IG Farbenindustrie AG
•
Filing: 1937-01-18
•
Granted: 1937-08-07
•
Expires: 1957-01-18
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-23 09:24
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/19; B01J39/04; B01J39/05
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.