US2427348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric vibrator
Assignee: AT&T Inc
•
Filing: 1941-08-19
•
Granted: 1947-09-16
•
Expires: 1961-08-19
Abstract
No abstract record available.
Inventors
- 👤 Walter L Bond
- 👤 Warren P Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:08
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; B06B1/0662; B06B1/067; G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S99/00; Y10S99/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2384465A
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US2248870A
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GB174355A
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US1677945A
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US1732029A
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US1619854A
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US2138036A
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GB466212A
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US2263902A
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US2283285A
Cited
US2207656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-15 | 1951-03-17 | 1951-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-15 | 1955-03-17 | 1955-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-15 | 1959-03-17 | 1959-09-16 | $7700.00 | Window Closed / Lapsed |