US3269401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transporting wax-bearing petroleum fluids in pipelines
Assignee: —
•
Filing: —
•
Granted: 1966-08-30
•
Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:35
CPC Classifications
F; F17; F17D; F17D1/00; F17D1/08; F17D1/16; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391; Y10T137/0402; Y10T137/0419; Y10T137/0424; Y10T137/8593; Y10T137/85978; Y10T137/86131; Y10T137/86139
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF TRANSPORTING AN OIL WHICH CONTAINS UNDISSOLVED WAX AT AMBIENT PIPELINE TEMPERATURE AND PREVENTING BUILDUP OF STRONG WAX STRUCTURES IN THE PIPELINE WHICH COMPRISES THE STEPS OF: (A) DISSOLVING IN SAID OIL WHILE ABOVE ITS FOUR POINT TEMPERATURE AND AT SUPERATMOSPHEREIC PRESSURE, GAS IN AN AMOUNT IN EXCESS OF THAT WHICH SATURATES THE OIL AT ATMOSPHERIC PRESSURE; AND (B) FLOWING THE RESULTING SOLUTION AT SUPERATMOSPHERIC PRESSURE THROUGH SAID PIPELINE WHEREBY SOME OF SAID DISSOLVED GAS SEPARATES TO FORM GAS BUBBLES WITHIN SAID OIL AS IT COOLS TO AMBIENT TEMPERATURE WITHIN THE PIPELINE TO PREVENT THE FORMATION OF STRONG WAX STRUCTURES IN SAID OIL UPON SUCH COOLING.
Claim 2
Independent Claim
108 words
THE METHOD OF TRANSPORTING AN OIL WHICH CONTAINS UNDISSOLVED WAX AT AMBIENT PIPELINE TEMPERATURE AND PREVENTING BUILDUP OF STRONG WAX STRUCTURES IN THE PIPELINE WHICH COMPRISES THE STEPS OF: (A) DISSOLVING IN SAID OIL WHILE ABOVE ITS FOUR POINT TEMPERATURE AND AT SUPERATMOSPHEREIC PRESSURE, GAS IN AN AMOUNT IN EXCESS OF THAT WHICH SATURATES THE OIL AT ATMOSPHERIC PRESSURE; AND (B) FLOWING THE RESULTING SOLUTION AT SUPERATMOSPHERIC PRESSURE THROUGH SAID PIPELINE WHEREBY SOME OF SAID DISSOLVED GAS SEPARATES TO FORM GAS BUBBLES WITHIN SAID OIL AS IT COOLS TO AMBIENT TEMPERATURE WITHIN THE PIPELINE TO PREVENT THE FORMATION OF STRONG WAX STRUCTURES IN SAID OIL UPON SUCH COOLING.
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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |