US3175571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic liner for conduits
Assignee: Individual
•
Filing: 1963-07-15
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Granted: 1965-03-30
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Expires: 1983-07-15
Abstract
No abstract record available.
Inventors
- 👤 Willard E Bankert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:38
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/002; F15D1/0025; F15D1/003; F15D1/0035; F15D1/004; F15D1/02; F15D1/06; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/2496; Y10T137/2559; Y10T137/2564
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A LUBRICATED PIPE LINE FOR TRANSPORTING FLUID COMPRISING A PLURALITY OF PIPE SECTIONS CONNECTED IN SERIES TO ONE ANOTHER, EACH PIPE SECTION HAVING AN INNER WALL WITH POCKETS ARRANGED IN A SPIRAL CONFIGURATION, INCLUDING A PLURALITY OF JACKETS, EACH ENCIRCLING ONE OF THE PIPE SECTIONS, AND BEING SPACED FROM ONE ANOTHER, WHEREIN EACH FORMS WITH ONE OF THE PIPE SECTIONS, AN ANNULAR CHAMBER FOR LUBRICANT FLUID OF LOWER VISCOSITY THAN THE FLUID IN THE PIPE LINE, AND WHEREIN THERE ARE PROVIDED PORTS FROM THE SAID ANNULAR CHAMBER TO THE SAID POCKETS, WHEREIN THE FLOW OF THE FLUID IN THE PIPE LINE WILL CAUSE LUBRICANT FLUID
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) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |