US2423922A
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Piezoelectric transducer
Assignee: Brush Development Co
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Filing: 1943-01-11
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Granted: 1947-07-15
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Expires: 1963-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:51
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/45; B29C65/00; B29C65/02; B29C65/34; B29C65/3404; B29C65/3408; B29C65/3412; B29C65/3444; B29C65/3448; B29C65/3468; B29C65/36; B29C65/3604; B29C65/3608; B29C65/3612; B29C65/3644; B29C65/3656; B29C65/56; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/303; B29C66/3034; B29C66/30341; B29C66/80; B29C66/81; B29C66/83; B29C66/832; B29C66/8322; H; H04; H04R; H04R17/00; B29C65/3472; B29C65/3476; B29C65/3672; B29C65/3676; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/1092; Y10T29/00; Y10T29/42; Y10T428/00; Y10T428/25
Claims Analysis
Total Claims: 0
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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) | 1950-07-14 | 1951-01-13 | 1951-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-14 | 1955-01-13 | 1955-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-14 | 1959-01-13 | 1959-07-15 | $7700.00 | Window Closed / Lapsed |