US3230504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open hemispherical transducers
Assignee: Individual
•
Filing: 1962-11-30
•
Granted: 1966-01-18
•
Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 John J Horan
- 👤 Jr James R Brown
- 👤 Maurice F Pressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:26
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622; B06B1/0637; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
IN A TRANDUCER, A SENSITIVE ELEMENT IN THE FORM OF A HOLLOW HEMISPHERE HAVING A RIM THEREABOUT, SAID SENSITIVE ELEMENT BEING FORMED OF ELECTROSTRICTIVE MATERIAL, A PAIR OF ELECTRODES ON DISPOSED ON THE INNER FACE AND ONE ON THE OUTER FACE OF SAID HEMISPHERE, A CONCENTRIC CERAMIC LINER FORMED OF ELECTROSTRICTIVE MATERIAL AND IN THE FORM OF A HEMISPHERE HAVING A DIAMETER LESS THAN THE DIAMETER OF SAID HOLLOW HEMISPHERE, SAID CERAMIC LINER HAVING EDGE MEANS ADJACENT SAID RIM OF SAID HOLLOW HEMISPHERE FOR SUPPORTING SAID RIM, A PAIR OF ELECTRODES ONE DISPOSED ON THE INNER FACE AND ONE ON THE OUTER FACE OF SAID CONCENTRIC CERAMIC LINER,
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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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |