US3119449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purging choke
Assignee: Individual
•
Filing: 1961-03-31
•
Granted: 1964-01-28
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
- 👤 Price Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:04
CPC Classifications
E; E21; E21B; E21B34/00; E21B34/02; E21B34/025; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/8158; Y10T137/8225; Y10T137/8275; Y10T137/8292
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PURGING CHOKE FOR A WELL COMPRISING A BODY HAVING PARTS FOR CONNECTION, RESPECTIVELY TO THE WELLHEAD AND TO A DELIVERY PIPE, MEANS DEFINING A FLOW-METERING PORT IN SAID BODY, A GRADUATED PLUNGER MOVABLE THROUGH SAID PORT DEFINING MEANS FOR SELECTIVELY CLOSING SAID MEANS AND VARYING THE EFFECTIVE CAPACITY THEREOF BETWEEN PURGING AND NORMAL FLOW METERING POSITIONS, MEANS RESILIENTLY URGING SAID PLUNGER TOWARD SAID PURGING POSITION, MEANS RESPONSIVE TO FLOW PRESSURE DIFFERENTIAL PAST AND ACROSS
Claim 2
Dependent Claim
75 words
A PURGING CHOKE FOR A WELL COMPRISING A BODY HAVING PARTS FOR CONNECTION, RESPECTIVELY TO THE WELLHEAD AND TO A DELIVERY PIPE, MEANS DEFINING A FLOW-METERING PORT IN SAID BODY, A GRADUATED PLUNGER MOVABLE THROUGH SAID PORT DEFINING MEANS FOR SELECTIVELY CLOSING SAID MEANS AND VARYING THE EFFECTIVE CAPACITY THEREOF BETWEEN PURGING AND NORMAL FLOW METERING POSITIONS, MEANS RESILIENTLY URGING SAID PLUNGER TOWARD SAID PURGING POSITION, MEANS RESPONSIVE TO FLOW PRESSURE DIFFERENTIAL PAST AND ACROSS
References Cited (Backward Citations)
US1316906A
Cited
US1737171A
Cited
US1919696A
Cited
US1910909A
Cited
US2285049A
Cited
US2584847A
Cited
US2608211A
Cited
US2955614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |