Patent US6020756A successfully refreshed from Google Patents.
Patent FR890520A successfully refreshed from Google Patents.
FR890520A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Lapping machine for flat surfaces
Assignee: Benjamin-Rene Planche
•
Filing: 1942-07-31
•
Granted: 1944-02-10
•
Expires: 1962-07-31
Abstract
No abstract record available.
Inventors
- 👤 Benjamin-Rene Planche
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-31 13:11
CPC Classifications
B; B24; B24B; B24B37/00; B24B37/04; B24B37/07; B24B37/10; B24B37/105
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.