US2674756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug for removing paraffin accumulating in oil conduits
Assignee: Atlantic Richfield Co
•
Filing: 1952-04-07
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Granted: 1954-04-13
•
Expires: 1972-04-07
Abstract
No abstract record available.
Inventors
- 👤 Harrell L Bilhartz
- 👤 Howard E Greenwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:50
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
A PLUG FOR REMOVING PARAFFIN FROM THE WALL OF A CONDUIT THROUGH WHICH OIL FLOWS, INCLUDING BETWEEN 55% AND 90% BY WEIGHT OF AN OIL-SOLUBLE BASE MATERIAL, BETWEEN 5% AND 45% BY WEIGHT OF A ROSIN AMINE SALT OF AN ORGANIC ACID SELECTED FROM THE GROUP COMPRISING THE HIGHER FATTY ACIDS, NAPHTHENIC ACIDS, SULFONIC ACIDS, CARBOXYLIC ACIDS, AND ACIDS DERIVED FROM THE OXIDATION OF PARAFFIN WAX, AND BETWEEN 0.5% AND 5% BY WEIGHT OF ETHYL CELLULOSE.
References Cited (Backward Citations)
US2603804A
Cited
US2599385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |