Patent US3225859A successfully refreshed from Google Patents.
US3225859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe line hydrophone system
Assignee: Individual
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Filing: 1964-03-30
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Granted: 1965-12-28
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:30
CPC Classifications
F; F16; F16L; F16L55/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
APPARATUS FOR MEASURING ACOUSTIC PRESSURE IN A FLUID CONTAINED BY A PIPE WALL HAVING AN APERTURE THERETHROUGH COMPRISING: A HYDROPHONE HAVING A PRESSURE SENSITIVE SURFACE ON ONE END THEREOF; MEANS FOR MOUNTING SAID HYDROPHONE ON THE PIPE WALL WITH SAID PRESSURE SENSITIVE SURFACE OF SAID HYDROPHONE DISPOSED IN THE PIPE APERTURE, FLUSH WITH THE INNER SURFACE OF SAID PIPE, AND SPACED FROM THE PERIPHERAL WALL OF SAID APERTURE; SAID HYDROPHONE INCLUDING A BODY MEMBER COMPRISING A CENTRAL PORTION, A HEAD PORTION ON END OF SAID
Claim 2
Dependent Claim
85 words
APPARATUS FOR MEASURING ACOUSTIC PRESSURE IN A FLUID CONTAINED BY A PIPE WALL HAVING AN APERTURE THERETHROUGH COMPRISING: A HYDROPHONE HAVING A PRESSURE SENSITIVE SURFACE ON ONE END THEREOF; MEANS FOR MOUNTING SAID HYDROPHONE ON THE PIPE WALL WITH SAID PRESSURE SENSITIVE SURFACE OF SAID HYDROPHONE DISPOSED IN THE PIPE APERTURE, FLUSH WITH THE INNER SURFACE OF SAID PIPE, AND SPACED FROM THE PERIPHERAL WALL OF SAID APERTURE; SAID HYDROPHONE INCLUDING A BODY MEMBER COMPRISING A CENTRAL PORTION, A HEAD PORTION ON END OF SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |