DE765408C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the production of cast tropicalized, light-absorbing color or neutral gray filters in the form of round wedges
Assignee: Zeiss Ikon AG
•
Filing: 1943-05-05
•
Granted: 1954-10-18
•
Expires: 1963-05-05
Abstract
No abstract record available.
Inventors
- 👤 Charlotte Dr-Ing Albrecht
- 👤 Michael Dunst
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 19:28
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/205; G02B26/00; G02B26/007; G02B26/02; G02B26/023
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.