Patent FR804987A successfully refreshed from Google Patents.
FR804987A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
Process for the production of spongy layers consisting of an aggregation of gum filaments
Assignee: Pirelli and C SpA
•
Filing: 1936-04-16
•
Granted: 1936-11-06
•
Expires: 1956-04-16
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-10-24 21:59
CPC Classifications
B; B29; B29K; B29K2105/00; B29K2105/04
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.