DE657908C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for producing halftone screens
Assignee: IG Farbenindustrie AG
•
Filing: 1935-11-16
•
Granted: 1938-03-16
•
Expires: 1955-11-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-31 17:42
CPC Classifications
G; G03; G03F; G03F5/00; G03F5/02; G03F5/12
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.