US1717775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing sound-amplifying horns
Assignee: UNITED REPRODUCERS Corp
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Filing: 1923-02-23
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Granted: 1929-06-18
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Expires: 1943-02-23
Abstract
No abstract record available.
Inventors
- 👤 Jesse B Hawley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
G; G10; G10K; G10K13/00; D; D21; D21J; D21J7/00; H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/30
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) | 1932-06-17 | 1932-12-17 | 1933-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-06-17 | 1936-12-17 | 1937-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-06-17 | 1940-12-17 | 1941-06-18 | $7700.00 | Window Closed / Lapsed |