Patent US2730920A successfully refreshed from Google Patents.
US2730920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Musical whistle
Assignee: Individual
•
Filing: 1955-02-08
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Granted: 1956-01-17
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Expires: 1975-02-08
Abstract
No abstract record available.
Inventors
- 👤 John H Bacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:35
CPC Classifications
G; G10; G10D; G10D9/00; G10D9/04; G10D9/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US388439A
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US1742121A
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US2519619A
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US2697298A
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US2506039A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |