US2944117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bender type piezoelectric transducer
Assignee: Erie Resistor Corp
•
Filing: 1955-06-20
•
Granted: 1960-07-05
•
Expires: 1975-06-20
Abstract
No abstract record available.
Inventors
- 👤 Robert B Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:27
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; H04R17/08; Y; Y10; Y10S; Y10S84/00; Y10S84/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1874960A
Cited
US1855151A
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US2025388A
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FR887596A
Cited
US2439499A
Cited
US2476848A
Cited
USRE23813E
Cited
US2515446A
Cited
US2841722A
Cited
US2900536A
Cited
US2880334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |