US2851541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical transducer
Assignee: Bosch Security Systems Inc
•
Filing: 1954-07-28
•
Granted: 1958-09-09
•
Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 John F Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:31
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/04; H04R17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB180787A
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US2138036A
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US2471625A
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US2416876A
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US2429414A
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US2549757A
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US2650991A
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US2639393A
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US2565586A
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US2703343A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |