US2640165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic transducer element
Assignee: GULTON Manufacturing CORP
•
Filing: 1948-05-29
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Granted: 1953-05-26
•
Expires: 1968-05-29
Abstract
No abstract record available.
Inventors
- 👤 Glenn N Howatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:19
CPC Classifications
H; H04; H04R; H04R17/00; Y; Y10; Y10T; Y10T29/00; Y10T29/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A PIEZOELECTRIC ELEMENT COMPRISING A PERMANENTLY CHARGED TITANATE CERAMIC HAVING ELECTRODES ON OPPOSITE FACES THEREOF.
Claim 2
Dependent Claim
15 words
A PIEZOELECTRIC ELEMENT COMPRISING A PERMANENTLY CHARGED TITANATE CERAMIC HAVING ELECTRODES ON OPPOSITE FACES THEREOF.
References Cited (Backward Citations)
US1886234A
Cited
FR849531A
Cited
US2402515A
Cited
US2478223A
Cited
US2486560A
Cited
US2592703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |