Patent US3285117A successfully refreshed from Google Patents.
US3285117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum head
Assignee: David Wexler and Co
•
Filing: 1965-04-05
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Granted: 1966-11-15
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Expires: 1985-04-05
Abstract
No abstract record available.
Inventors
- 👤 Cheslow Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:19
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/10; G10D13/20; G10D13/01; G10D13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A DRUM HEAD WHICH COMPRISES: A SYNTHETIC PLASTIC VIBRATORY DIAPHRAGM ADAPTED TO FIT OVER THE OPEN PORTION DEFINED BY A DRUM BARREL, THE PERIPHERY OF SAID DIAPHRAGM FORMING A CHANNEL; AND A SOLID COMPOSITION FILLING SAID CHANNEL, SAID SOLID COMPOSITION BEING CHEMICALLY BONDED WITH THE INNER SURFACE OF SAID CHANNEL.
Claim 2
Dependent Claim
50 words
A DRUM HEAD WHICH COMPRISES: A SYNTHETIC PLASTIC VIBRATORY DIAPHRAGM ADAPTED TO FIT OVER THE OPEN PORTION DEFINED BY A DRUM BARREL, THE PERIPHERY OF SAID DIAPHRAGM FORMING A CHANNEL; AND A SOLID COMPOSITION FILLING SAID CHANNEL, SAID SOLID COMPOSITION BEING CHEMICALLY BONDED WITH THE INNER SURFACE OF SAID CHANNEL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |