US2537141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud-speaker horn
Assignee: Individual
•
Filing: 1945-06-15
•
Granted: 1951-01-09
•
Expires: 1965-06-15
Abstract
No abstract record available.
Inventors
- 👤 Paul W Klipsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:59
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/02; G10K11/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1666059A
Cited
US1067905A
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US1477556A
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US1666057A
Cited
US1525320A
Cited
US1666058A
Cited
US1614983A
Cited
GB281792A
Cited
US2001089A
Cited
US1992268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-08 | 1954-07-10 | 1955-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-08 | 1958-07-10 | 1959-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-08 | 1962-07-10 | 1963-01-09 | $7700.00 | Window Closed / Lapsed |