US3301277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic-lined conduit
Assignee: Phillips Petroleum Co
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Filing: 1963-10-18
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Granted: 1967-01-31
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Expires: 1983-10-18
Abstract
No abstract record available.
Inventors
- 👤 Harold S Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:59
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1009; F16L58/1027; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
A CONDUIT ASSEMBLY COMPRISING A PRESSURE-RESISTANT CONDUIT; A PLASTIC LINER POSITIONED IN SAID CONDUIT SO AS TO PROVIDE AN ANNULUS BETWEEN SAID CONDUIT AND SAID LINER; A VESSEL SEPARATED INTO TWO FLUID-TIGHT CHAMBERS BY A FLEXIBLE MEMBRANE; FLUID PASSAGE MEANS CONNECTING SAID ANNULUS AND ONE OF SAID CHAMBERS; FLUID PASSAGE MEANS CONNECTING THE INTERIOR OF SAID LINER AND THE OTHER SAID CHAMBER; A FLUID SUBSTANTIALLY FILLING SAID ANNULUS; AND A FLUID SUBSTANTIALLY FILLING SAID LINER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |