US3089520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic piping system for fluids at high temperature
Assignee: Individual
•
Filing: 1960-04-01
•
Granted: 1963-05-14
•
Expires: 1980-04-01
Abstract
No abstract record available.
Inventors
- 👤 Huet Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:51
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/08; F16L59/14; F16L59/147; G; G21; G21C; G21C11/00; G21C11/08; G21C15/00; G21C15/20; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A TUBULAR STEEL CONDUIT FOR FLUIDS AT TEMPERATURES IN THE VICINITY OF 600* C. AND OVER, COMPRISING A MAIN TUBE OF HIGH MECHANICAL STRENGTH PROVIDED EXTERNALLY WITH EXTENSIONS IN THE FORM OF RADIAL FINS WHICH EXTEND TRANSVERSELY OF THE AXIS OF SAID TUBE, AND A SECONDARY TUBE CONCENTRIC WITH THE MAIN TUBE AND DISPOSED EXTERIORLY OF SAID MAIN TUBE AND HAVING AN INNER SURFACE SPACED APART RADIALLY FROM THE EXTREMITIES OF THE EXTENSONS BY A DIS-
Claim 2
Dependent Claim
76 words
A TUBULAR STEEL CONDUIT FOR FLUIDS AT TEMPERATURES IN THE VICINITY OF 600* C. AND OVER, COMPRISING A MAIN TUBE OF HIGH MECHANICAL STRENGTH PROVIDED EXTERNALLY WITH EXTENSIONS IN THE FORM OF RADIAL FINS WHICH EXTEND TRANSVERSELY OF THE AXIS OF SAID TUBE, AND A SECONDARY TUBE CONCENTRIC WITH THE MAIN TUBE AND DISPOSED EXTERIORLY OF SAID MAIN TUBE AND HAVING AN INNER SURFACE SPACED APART RADIALLY FROM THE EXTREMITIES OF THE EXTENSONS BY A DIS-
References Cited (Backward Citations)
US2369204A
Cited
US2023025A
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US2658527A
Cited
US2599210A
Cited
US2761949A
Cited
US2896669A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |