US2920150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support for microphones
Assignee: Bosch Security Systems Inc
•
Filing: 1954-05-18
•
Granted: 1960-01-05
•
Expires: 1974-05-18
Abstract
No abstract record available.
Inventors
- 👤 Louis R Burroughs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:58
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US225020A
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US849975A
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GB191319857A
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US1536407A
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US1653109A
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US1780719A
Cited
US1871519A
Cited
US1805362A
Cited
US2557570A
Cited
US2679369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |