US3613380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of supporting warm pipeline in arctic region
Assignee: Phillips Petroleum Co
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Filing: 1969-06-18
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Granted: 1971-10-19
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Expires: 1989-06-18
Abstract
Abstract A STABLE PIPELINE IN PERMAFROST AREAS IS ACHIEVED BY LAYING PIPE ON SPACED SUPPORTS EXTENDING AWAY FROM THE PIPELINE AND INTO THE SOLIDLY FROZEN PERMAFROST SO AS TO PREVENT SINKING OF THE PIPELINE INTO A THAWED ZONE PRODUCED BY HEAT LEAKAGE FROM WARM FLUID CARRIED IN THE PIPELINE.
Inventors
- 👤 Jack Tarner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:02
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/024; F16L1/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |