Patent US3513465A successfully refreshed from Google Patents.
US3513465A
Expired / Lapsed
US
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Sound monitoring system having plural selectively disconnectable microphones and a central monitoring station
Assignee: HENRY W TITHERINGTON
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Filing: 1966-08-24
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Granted: 1970-05-19
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Expires: 1986-08-24
Abstract
No abstract record available.
Inventors
- 👤 Henry W Titherington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:19
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/16; G08B13/1654; G08B13/1672; G08B25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1412103A
Cited
US640273A
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US1643759A
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US2212660A
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US2616973A
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US2709251A
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US2796600A
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US3167755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |