Patent US2632055A successfully refreshed from Google Patents.
US2632055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud speaker system
Assignee: Individual
•
Filing: 1949-04-18
•
Granted: 1953-03-17
•
Expires: 1969-04-18
Abstract
No abstract record available.
Inventors
- 👤 John E Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:21
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/227
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1931235A
Cited
US2093076A
Cited
US1877992A
Cited
US1915954A
Cited
US2160112A
Cited
US2122010A
Cited
US2143175A
Cited
US2242556A
Cited
US2373692A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-16 | 1956-09-15 | 1957-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-16 | 1960-09-15 | 1961-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-16 | 1964-09-15 | 1965-03-17 | $7700.00 | Window Closed / Lapsed |