US4213121C1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chime tone audio system utilizing a piezoelectric transducer
Assignee: Yosemite Investments Inc
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Filing: 1978-06-08
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Granted: 2002-05-14
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Expires: 1998-06-08
Abstract
No abstract record available.
Inventors
- 👤 Richard L Lears
- 👤 Louis P Sweany
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:16
CPC Classifications
G; G08; G08B; G08B3/00; G08B3/10; G04; G04G; G04G13/00; G04G13/02; G04G13/021; G10; G10H; G10H5/00; Y; Y10; Y10S; Y10S84/00; Y10S84/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-05-13 | 2005-11-12 | 2006-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-05-13 | 2009-11-12 | 2010-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-05-13 | 2013-11-12 | 2014-05-14 | $7700.00 | Window Closed / Lapsed |