US3263209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure compensated hydrophone
Assignee: Individual
•
Filing: 1964-01-29
•
Granted: 1966-07-26
•
Expires: 1984-01-29
Abstract
No abstract record available.
Inventors
- 👤 Theodore C Madison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:18
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0655
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
20 words
THE HYDROPHONE OF CLAIM 3 WHERE IN SAID ELEMENT GENERATES SIGNALS IN RESPONSE TO ACOUSTICAL SIGNALS RECIEVED THROUGH SAID HOUSING.
References Cited (Backward Citations)
US2977572A
Cited
US3108247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |