Patent US3270300A successfully refreshed from Google Patents.
US3270300A
Expired / Lapsed
US
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Reverberation unit magnetic assembly
Assignee: Hammond Organ Co
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Filing: 1962-04-26
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Granted: 1966-08-30
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Johan Van Leer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:19
CPC Classifications
G; G10; G10K; G10K15/00; G10K15/08; G10K15/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
A POLE PIECE STRUCTURE, TWO OF WHICH USED TOGETHER PROVIDE A PAIR OF ALIGNED SPACED APART MAGNETIC GAPS HAVING SUBSTANTIALLY IDENTICAL CHARACTERISTICS, COMPRISING A NARROW RECTANGULAR SHEET METAL STRIP ADAPTED TO EXTEND INTO A CORE PASSAGE OF A COIL, SAID CORE STRIP HAVING AN INTEGRAL TAB AT ONE END EXTENDING AT RIGHT ANGLES TO THE PLANE OF THE CORE STRIP, SAID TAB BEING INTEGRALLY EDGE JOINED TO AN OFFSET TRANSVERSELY EXTENDING STRIP HAVING OFF-
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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) | 1969-08-29 | 1970-02-28 | 1970-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-29 | 1974-02-28 | 1974-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-29 | 1978-02-28 | 1978-08-30 | $7700.00 | Window Closed / Lapsed |