US2676207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable public address system
Assignee: Individual
•
Filing: 1953-05-22
•
Granted: 1954-04-20
•
Expires: 1973-05-22
Abstract
No abstract record available.
Inventors
- 👤 Donovan D Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:56
CPC Classifications
F; F16; F16M; F16M13/00; F16M13/04; F16M11/00; F16M11/02; F16M11/04; F16M11/06; F16M11/08; F16M11/20; F16M11/2007; F16M11/2014; H; H04; H04R; H04R27/00; H04R27/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |