US3689319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paraffin removal process
Assignee: Texaco Inc
•
Filing: 1970-11-02
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Granted: 1972-09-05
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Expires: 1990-11-02
Abstract
Abstract SOLID PARAFFIN-LIKE HYDROCARBON MATERIALS DEPOSITED ON THE SURFACES OF OIL WELL PRODUCTION EQUIPMENT ARE REMOVED BY CONTACTING THE SOLID DEPOSITS WITH CERTAIN HYDROLYZABLE, APROTIC, HALOGENATED ORGANIC MATERIALS, SUCH AS ALLYL CHLORIDE, AND THE HALOGENATED ORGANIC COMPOUND CONTAINING THE DISSOLVED OR PEPTIZED PARAFFIN IS REMOVED FROM THE EQUIPMENT AND CONDUCTED TO A VESSEL CONTAINING WATER OR A BASE DISSOLVED IN WATER.
Inventors
- 👤 Thomas E Sample Jr
- 👤 Jack F Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:57
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: 0
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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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |