US3272057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum head and method of its manufacture
Assignee: Individual
•
Filing: 1965-10-19
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Granted: 1966-09-13
•
Expires: 1985-10-19
Abstract
No abstract record available.
Inventors
- 👤 Saito Yukio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:08
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/10; G10D13/20; G10D13/01; G10D13/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A DRUM HEAD WHICH COMPRISES A VIBRATILE DIAPHRAGM SHEET AND A SUPPORTING RING MEMBER SECURING THE PERIPHERY OF THE SAID SHEET, CHARACTERISED IN THAT THE EDGE OF THE SAID SHEET EXTENDS DOWNWARDLY FROM THE PERIPHERY, TURNS OUTWARDLY AND UPWARDLY, AND ITS END IS SECURED TO THE LOWER PART OF THE PERIPHERY OF THE SHEET TO THEREBY FORM AN ANNULAR VOID, A RIGID ANNULAR MEMBER, IF DESIRED, BEING INSERTED INTO THE SAID ANNULAR VOID, AND THAT AN INSIDE AND AN OUTSIDE RING-LIKE MEMBER COMPOSED OF A RESIN-IMPREGNATED CONTINUOUS GLASS FILAMENTS WOUND IN LAYER ARE SOLIDIFIED WITH THE EDGE OF THE SAID SHEET DISPOSED BETWEEN THEM AND MADE INTO AN INTEGRAL SUPPORTING RING.
Claim 2
Dependent Claim
111 words
A DRUM HEAD WHICH COMPRISES A VIBRATILE DIAPHRAGM SHEET AND A SUPPORTING RING MEMBER SECURING THE PERIPHERY OF THE SAID SHEET, CHARACTERISED IN THAT THE EDGE OF THE SAID SHEET EXTENDS DOWNWARDLY FROM THE PERIPHERY, TURNS OUTWARDLY AND UPWARDLY, AND ITS END IS SECURED TO THE LOWER PART OF THE PERIPHERY OF THE SHEET TO THEREBY FORM AN ANNULAR VOID, A RIGID ANNULAR MEMBER, IF DESIRED, BEING INSERTED INTO THE SAID ANNULAR VOID, AND THAT AN INSIDE AND AN OUTSIDE RING-LIKE MEMBER COMPOSED OF A RESIN-IMPREGNATED CONTINUOUS GLASS FILAMENTS WOUND IN LAYER ARE SOLIDIFIED WITH THE EDGE OF THE SAID SHEET DISPOSED BETWEEN THEM AND MADE INTO AN INTEGRAL SUPPORTING RING.
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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |