US3165155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic paraffin scraper
Assignee: Gem Oil Tool Co Inc
•
Filing: 1961-09-22
•
Granted: 1965-01-12
•
Expires: 1981-09-22
Abstract
No abstract record available.
Inventors
- 👤 William D Leathers
- 👤 Leroy Q Gresham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:10
CPC Classifications
E; E21; E21B; E21B37/00; E21B37/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
WELL TUBING SCRAPER CONTROL MECHANISM WHICH IS ADAPTED TO RUN A WIRE LINE SUSPENDED SCRAPER TOOL THROUGH A WELL TUBING STRING AND FROM AND RETURN TO AN INACTIVE LOCATION IN A SCRAPER HOUSING SECTION OF THE TUBING STRING, INCLUDING A WIRE LINE REEL, A REVRSIBLE FLUID PRESSURE MOTOR DRIVE CONNECTED WITH SAID WIRE LINE REEL, A FIRST PRESSURE ACTUATED VALVE SHIFTABLE TO AND FROM A SETTING WHICH DIRECTS PRESSURE FLUID DELIVERY TO SAID MOTOR FOR DRIVING THE SAME IN WIRE LINE UNREELING DIRECTION, A SECOND PRESSURE ACTUATED VALVE SHIFTABLE TO AND FROM A SETTING WHICH DIRECTS PRESSURE FLUID DELIVERY TO SAID MOTOR FOR DRIVING THE SAME IN WIRE LINE REREELING DIRECTION, A PERIODICALLY OPERATING CONTROLLER THROUGH WHICH A PRESSURE FLUID SIGNAL IS TRANSMITTED TO THE FIRST PRESSURE ACTUATED VALVE FOR SHIFTING THE SAME TO ITS PRESSURE FLUID DELIVERY SETTING, PRESSURE FLUID SIGNAL TRANSMITTING MEANS CONNECTED WITH BOTH OF THE AFOREMENTIONED VALVES AND
Claim 2
Dependent Claim
152 words
WELL TUBING SCRAPER CONTROL MECHANISM WHICH IS ADAPTED TO RUN A WIRE LINE SUSPENDED SCRAPER TOOL THROUGH A WELL TUBING STRING AND FROM AND RETURN TO AN INACTIVE LOCATION IN A SCRAPER HOUSING SECTION OF THE TUBING STRING, INCLUDING A WIRE LINE REEL, A REVRSIBLE FLUID PRESSURE MOTOR DRIVE CONNECTED WITH SAID WIRE LINE REEL, A FIRST PRESSURE ACTUATED VALVE SHIFTABLE TO AND FROM A SETTING WHICH DIRECTS PRESSURE FLUID DELIVERY TO SAID MOTOR FOR DRIVING THE SAME IN WIRE LINE UNREELING DIRECTION, A SECOND PRESSURE ACTUATED VALVE SHIFTABLE TO AND FROM A SETTING WHICH DIRECTS PRESSURE FLUID DELIVERY TO SAID MOTOR FOR DRIVING THE SAME IN WIRE LINE REREELING DIRECTION, A PERIODICALLY OPERATING CONTROLLER THROUGH WHICH A PRESSURE FLUID SIGNAL IS TRANSMITTED TO THE FIRST PRESSURE ACTUATED VALVE FOR SHIFTING THE SAME TO ITS PRESSURE FLUID DELIVERY SETTING, PRESSURE FLUID SIGNAL TRANSMITTING MEANS CONNECTED WITH BOTH OF THE AFOREMENTIONED VALVES AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |