DE697820C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Heat-retaining envelope
Assignee: GEORG HASSAUER
•
Filing: 1939-03-28
•
Granted: 1940-10-24
•
Expires: 1959-03-28
Abstract
No abstract record available.
Inventors
- 👤 Georg Hassauer
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-10-23 04:04
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F2007/0001; A61F2007/0029; A61F2007/003; A61F2007/0225; A61F2007/0226; A61F2007/0244; A61F2007/0257; A61F2007/026; A61F2007/0266
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.