US2522492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic metronome
Assignee: CRYSTAL RES LAB Inc
•
Filing: 1946-05-29
•
Granted: 1950-09-19
•
Expires: 1966-05-29
Abstract
No abstract record available.
Inventors
- 👤 Walther M A Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
G; G04; G04F; G04F5/00; G04F5/02; G04F5/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2132264A
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US1038206A
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US1784595A
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US1993890A
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US2144873A
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US2078505A
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US2097066A
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US2250819A
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GB537310A
Cited
US2307620A
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US2329137A
Cited
US2426179A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |