Patent US3215021A successfully refreshed from Google Patents.
US3215021A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum
Assignee: Individual
•
Filing: 1964-07-16
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Granted: 1965-11-02
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Expires: 1984-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jr Ralph C Kester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/01; G10D13/02; G10D13/10; G10D13/22; G10D13/25; G10D13/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A VARIABLE SOUND DRUM, COMPRISING TWO SECTIONS, EACH STATION HAVING A SHELL, A HEAD ON EACH SHELL WITH A HOOP AROUND THE PERIPHERY THEREOF, AND A PLURALITY OF TENSIONING MEANS ON EACH SHELL FOR THE RESPECTIVE HEAD SECURED TO ONE END TO SAID HOOP AND THE OTHER END TO THE RESPECTIVE SHELL, A HING MEANS CONNECTING SAID SHELLS WITH THE HEADS THEREOF POSITIONED AWAY FROM ONE ANOTHER, A LATCH MEANS FOR LOCKING SAID SHELLS IN CLOSED POSITION, ARMS ON OPPOSITE SIDES OF SAID SECTIONS, MEANS ON SAID ARMS FOR PIVOTALLY ENGAGING ONE OF SAID SECTIONS AT POINTS DIAMETRICALLY OPPOSITE TO ONE ANOTHER AND A NINETY DE-
Claim 2
Dependent Claim
106 words
A VARIABLE SOUND DRUM, COMPRISING TWO SECTIONS, EACH STATION HAVING A SHELL, A HEAD ON EACH SHELL WITH A HOOP AROUND THE PERIPHERY THEREOF, AND A PLURALITY OF TENSIONING MEANS ON EACH SHELL FOR THE RESPECTIVE HEAD SECURED TO ONE END TO SAID HOOP AND THE OTHER END TO THE RESPECTIVE SHELL, A HING MEANS CONNECTING SAID SHELLS WITH THE HEADS THEREOF POSITIONED AWAY FROM ONE ANOTHER, A LATCH MEANS FOR LOCKING SAID SHELLS IN CLOSED POSITION, ARMS ON OPPOSITE SIDES OF SAID SECTIONS, MEANS ON SAID ARMS FOR PIVOTALLY ENGAGING ONE OF SAID SECTIONS AT POINTS DIAMETRICALLY OPPOSITE TO ONE ANOTHER AND A NINETY DE-
References Cited (Backward Citations)
US929175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |