Patent DE1925494A1 successfully refreshed from Google Patents.
DE1925494A1
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Roof slab with foam base and asbestos - cement stiffener
Assignee: Individual
•
Filing: 1969-05-20
•
Granted: —
•
Expires: 1989-05-20
Abstract
Abstract Plastics pipes are on one side of a carrier layer of polyurethane foam which is joined to a slab on the far side and is fitted with a stiffener in the form of a fireproof or fire-resistant asbestos cement slab. The carrier may be foamed onto or foamed in situ on this slab stiffener.
Inventors
- 👤 auf Nichtnennung. M E04d 11-00 Antrag
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 12:18
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/351; E04D3/355; E04D3/352; E04D9/00
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.