Patent US5978795A successfully refreshed from Google Patents.
Patent DE536157C successfully refreshed from Google Patents.
DE536157C
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Process for the production of pipes and channels made of concrete or reinforced concrete
Assignee: SPEZIALBAUTEN AG F
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Filing: 1927-12-01
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Granted: 1931-10-20
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Expires: 1947-12-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-07 16:36
CPC Classifications
B; B28; B28B; B28B21/00; B28B21/42
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References Cited (Backward Citations)
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