Patent US2757533A successfully refreshed from Google Patents.
US2757533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas leak detector for well casing
Assignee: Phillips Petroleum Co
•
Filing: 1951-01-02
•
Granted: 1956-08-07
•
Expires: 1971-01-02
Abstract
No abstract record available.
Inventors
- 👤 Bruce F Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:19
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/107; F; F16; F16L; F16L2101/00; F16L2101/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN APPARATUS FOR LOCATING A GAS LEAK IN A CLOSED-IN GAS WELL CASING WHICH COMPRISES A SUBSTANTIALLY CYLINDRICAL BODY ADAPTED TO BE LOWERED INTO A WELL CASING AND ADAPTED TO PROVIDE A CLOSE FIT THEREWITH; A SIREN SECURED TO SAID CYLINDRICAL BODY; A SINGLE PASSAGEWAY THROUGH SAID BODY COMMUNICATING AT ITS UPPER END WITH SAID SIREN; AND MEANS AT THE SURFACE FOR RECEIVING AND AMPLIFYING THE SOUND PRODUCED BY SAID SIREN.
Claim 2
Independent Claim
71 words
AN APPARATUS FOR LOCATING A GAS LEAK IN A CLOSED-IN GAS WELL CASING WHICH COMPRISES A SUBSTANTIALLY CYLINDRICAL BODY ADAPTED TO BE LOWERED INTO A WELL CASING AND ADAPTED TO PROVIDE A CLOSE FIT THEREWITH; A SIREN SECURED TO SAID CYLINDRICAL BODY; A SINGLE PASSAGEWAY THROUGH SAID BODY COMMUNICATING AT ITS UPPER END WITH SAID SIREN; AND MEANS AT THE SURFACE FOR RECEIVING AND AMPLIFYING THE SOUND PRODUCED BY SAID SIREN.
References Cited (Backward Citations)
US1269599A
Cited
US2008934A
Cited
US2191119A
Cited
US2210417A
Cited
US2545102A
Cited
US2502863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |