US3865722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corona discharge treatment of an oil slick
Assignee: Individual
•
Filing: 1972-10-25
•
Granted: 1975-02-11
•
Expires: 1992-10-25
Abstract
Abstract By subjecting an oil slick freely floating on a water surface to the action of a corona discharge, the oil tends to conglomerate and become cohesive. As a result, removal of the oil from the water surface is facilitated.
Inventors
- 👤 Patrick C Stoddard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:16
CPC Classifications
E; E02; E02B; E02B15/00; E02B15/04; E02B15/06; B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; C; C02; C02F; C02F1/00; C02F1/68; C02F1/681; B01J2219/00; B01J2219/08; B01J2219/0803; B01J2219/0805; B01J2219/0845; B01J2219/0849; Y; Y02; Y02A; Y02A20/00; Y02A20/20; Y02A20/204; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
A PROCESS FOR REMOVING A NON-EMULSIFIED, IMMISCIBLE LIQUID HYDROCARBON FLOATING ON THE SURFACE OF A BODY OF WATER IN A THIN, SUBSTANTIALLY CONTINUOUS LAYER COMPRISING POSITIONING A CORONA GENERATING ELECTRICAL LEAD ABOVE SAID LIQUID HYDROCARBON, APPLYING SUFFICIENT ELECTRIDAL ENERGY TO SAID LEAD TO GENERATE A CORONA AND SUBJECT SAID LIQUID HYDROCARBON TO THE ACTION OF SAID CORONA, CONTINUING THE APPLICATION OF SAID ELECTRICALLY ENERGY UNTIL SAID LIQUID HYDROCARBON BECOMES ELECTRICALLY CHARGED AND INCREASES IN SURFACE TENSION, AND THEN REMOVING SAID LIQUID HYDROCARBON FROM SAID SURFACE.
Claim 2
Dependent Claim
85 words
A PROCESS FOR REMOVING A NON-EMULSIFIED, IMMISCIBLE LIQUID HYDROCARBON FLOATING ON THE SURFACE OF A BODY OF WATER IN A THIN, SUBSTANTIALLY CONTINUOUS LAYER COMPRISING POSITIONING A CORONA GENERATING ELECTRICAL LEAD ABOVE SAID LIQUID HYDROCARBON, APPLYING SUFFICIENT ELECTRIDAL ENERGY TO SAID LEAD TO GENERATE A CORONA AND SUBJECT SAID LIQUID HYDROCARBON TO THE ACTION OF SAID CORONA, CONTINUING THE APPLICATION OF SAID ELECTRICALLY ENERGY UNTIL SAID LIQUID HYDROCARBON BECOMES ELECTRICALLY CHARGED AND INCREASES IN SURFACE TENSION, AND THEN REMOVING SAID LIQUID HYDROCARBON FROM SAID SURFACE.
Claim 3
Dependent Claim
14 words
The process of claim 1 in which said liquid hydrocarbon is a mineral oil.
Claim 4
Dependent Claim
13 words
The process of claim 1 in which said liquid hydrocarbon is crude petroleum.
Claim 5
Dependent Claim
20 words
The process of claim 1 in which said electrical energy is applied until said liquid hydrocarbon comglomerates and becomes cohesive.
Claim 6
Dependent Claim
13 words
THe process of claim 1 in which said corona is a positive corona.
Claim 7
Dependent Claim
13 words
The process of claim 1 in which said corona is a negative corona.
Claim 8
Dependent Claim
30 words
The process of claim 1 in which said liquid hydrocarbon is passed through a filter after being removed from said surface to discharge the electric charge on said liquid hydrocarbon.
References Cited (Backward Citations)
US3074870A
Cited
US3578171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |