Patent JPS5870542A successfully refreshed from Google Patents.
US2818079A
Expired / Lapsed
US
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Prevention of paraffin deposition
Assignee: Texaco Development Corp
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Filing: 1954-02-23
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Granted: 1957-12-31
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Expires: 1974-02-23
Abstract
No abstract record available.
Inventors
- 👤 Allen D Garrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:20
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; B; B65; B65H; B65H29/00; B65H29/68; Y; Y10; Y10T; Y10T137/00; Y10T137/0318
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE TRANSPORTATION OF PETROLEUM THROUGH A CONDUIT WHEREIN THE PETROLEUM CONTAINS WAXY MATERIALS WHICH TEND TO BUILD UP OBJECTIONABLE DEPOSITS OF SAID WAXY MATERIALS ON THE INTERIOR SURFACE OF THE CONDUIT, THE IMPROVEMENT WHICH COMPRISES PROVIDING SAID CONDUIT WITH AN INTERIOR COATING COMPRISING A MATERIAL HAVING A HIGHER ADHESION TENSION AGAINST WATER THAN AGAINST OIL AND SELECTED FROM THE GROUP CONSISTING OF WATER-INSOLUBLE SALTS OF GALLIC ACID, THE SUGAR ACIDS, TANNIC ACID, ORTHO- META-, AND PYROPHOSPHORIC ACIDS AND THE WATER-INSOLUBLE FERRI- AND FERROCYANIDES AND MAINTAINING SAID COATING WATER-WET SO THAT AN ADSORBED HYDROUS FILM IS MAINTAINED BETWEEN THE INTERIOR SURFACE OF THE CONDUIT AND SAID PETROLEUM STREAM, THEREBY INHIBITING ADHESION OF SAID MATERIAL TO SAID CONDUIT.
Claim 2
Dependent Claim
117 words
IN THE TRANSPORTATION OF PETROLEUM THROUGH A CONDUIT WHEREIN THE PETROLEUM CONTAINS WAXY MATERIALS WHICH TEND TO BUILD UP OBJECTIONABLE DEPOSITS OF SAID WAXY MATERIALS ON THE INTERIOR SURFACE OF THE CONDUIT, THE IMPROVEMENT WHICH COMPRISES PROVIDING SAID CONDUIT WITH AN INTERIOR COATING COMPRISING A MATERIAL HAVING A HIGHER ADHESION TENSION AGAINST WATER THAN AGAINST OIL AND SELECTED FROM THE GROUP CONSISTING OF WATER-INSOLUBLE SALTS OF GALLIC ACID, THE SUGAR ACIDS, TANNIC ACID, ORTHO- META-, AND PYROPHOSPHORIC ACIDS AND THE WATER-INSOLUBLE FERRI- AND FERROCYANIDES AND MAINTAINING SAID COATING WATER-WET SO THAT AN ADSORBED HYDROUS FILM IS MAINTAINED BETWEEN THE INTERIOR SURFACE OF THE CONDUIT AND SAID PETROLEUM STREAM, THEREBY INHIBITING ADHESION OF SAID MATERIAL TO SAID CONDUIT.
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) | 1960-12-30 | 1961-07-01 | 1961-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-30 | 1965-07-01 | 1965-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-30 | 1969-07-01 | 1969-12-31 | $7700.00 | Window Closed / Lapsed |