Patent US3776248A successfully refreshed from Google Patents.
US3776248A
Expired / Lapsed
US
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Pipeline transportation of waxy products
Assignee: Shell USA Inc
•
Filing: 1971-08-10
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Granted: 1973-12-04
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Expires: 1991-08-10
Abstract
Abstract An improved method of pipeline transporting highly waxy crude oil in pumpable slurry form with the aid of a particular class of non-ionic surfactants.
Inventors
- 👤 P Titus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:37
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/106; C10L1/12; C10L1/1233; C10L1/125; C10L1/14; C10L1/18; C10L1/192; C10L1/198; C10L1/1985; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
11 words
The method of claim 1 wherein the aqueous liquid is water.
Claim 2
Dependent Claim
10 words
The method of claim 2 wherein the surfactant is nonylphenoxytetraethyleneoxyethanol.
Claim 3
Dependent Claim
21 words
The method of claim 3 wherein the amount of water used to form the slurry is between 5 and 40 percent.
References Cited (Backward Citations)
CA561353A
Cited
US2981683A
Cited
US3487844A
Cited
US3519006A
Cited
US3630953A
Cited
US3467195A
Cited
US3552494A
Cited
US3670752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |