DE697595C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Fountain pen-like writing instrument with a spring-loaded air inlet valve
Assignee: Heimberg & Gresers Chemische F
•
Filing: 1938-03-22
•
Granted: 1940-10-17
•
Expires: 1958-03-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-29 23:11
CPC Classifications
B; B43; B43K; B43K1/00; B43K1/08; B43K1/086
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.