Patent US3559664A successfully refreshed from Google Patents.
US3559664A
Expired / Lapsed
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Process of reducing friction loss in flowing hydrocarbon liquids
Assignee: Shell USA Inc
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Filing: 1967-09-28
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Granted: 1971-02-02
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Expires: 1987-09-28
Abstract
Abstract A method of reducing friction during flow of hydrocarbon liquids through conduits by addition to the liquids of a small amount of a copolymer of ethylenepropylene. This invention relates to a method of decreasing friction loss in flowing hydrocarbon liquids through conduits, generally over great distances but also over short distances such as in well fracturing processes. More particularly, the invention is directed to the addition of a novel class of ethylenepropylene copolymers to hydrocarbon liquids such as crude oil and fractions thereof, so as to reduce its friction loss due to flow through pipelines over great distances and short distances.
Inventors
- 👤 Errol V Seymour
- 👤 Deloss E Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:04
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/08; C09; C09K; C09K3/00; C09K8/00; C09K8/58; C09K8/588; C09K8/60; C09K8/62; C09K8/64; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1625; C10L1/1633; C10L1/1641; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
The method of claim 1 wherein the block copolymer is a microblock copolymer of polyethylene and polypropylene having an intrinsic viscosity of from 6 to 15.
Claim 2
Dependent Claim
21 words
The method of claim 1 wherein the hydrocarbon fluid being transported through the pipeline is a crude oil and fraction thereof.
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |