US1550697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud speaker
Assignee: Individual
•
Filing: 1924-06-07
•
Granted: 1925-08-25
•
Expires: 1944-06-07
Abstract
No abstract record available.
Inventors
- 👤 Paul E Haug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:59
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/34; H04R1/345
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1928-08-24 | 1929-02-23 | 1929-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-08-24 | 1933-02-23 | 1933-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-08-24 | 1937-02-23 | 1937-08-25 | $7700.00 | Window Closed / Lapsed |