FR655840A
Expired / Lapsed
FR
⏱️ 0.0 years remaining
external sealing for the casing and the stripping of the tubes for the introduction and extraction of the drillstrings from the eruptive layers
Assignee: Mihail Victor Bodnarescu
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Filing: 1928-06-01
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Granted: 1929-04-24
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Expires: 1948-06-01
Abstract
No abstract record available.
Inventors
- 👤 Mihail Victor Bodnarescu
Bibliographic Details
Application Number
—
Jurisdiction
FR
Data Source
google_patents
Last Synchronized
2026-11-03 17:57
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; F; F16; F16J; F16J15/00; F16J15/46
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