US3093207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic diaphragm for electrodynamic loudspeakers
Assignee: R T BOZAK Mfg CO
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Filing: 1960-10-04
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Granted: 1963-06-11
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Expires: 1980-10-04
Abstract
No abstract record available.
Inventors
- 👤 Rudolph T Bozak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:25
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12; H04R7/122; H04R7/125; H04R7/26; H04R2307/00; H04R2307/027; H04R2307/029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A DIAPHRAGM FOR ELECTRODYNAMIC LOUDSPEAKERS WHICH COMPRISES A THIN LIGHTWEIGHT SHEET IN THE GENERAL FORM OF AN OPEN CONE WITH CURVED WALL, A PERIPHERAL PORTION AT THE LARGE OPEN END OF SAID GENERALLY CONICAL SHEET BEING BENT TO FORM A FLANGE, A REINFORCING MEMBER POSITIONED ADJACENT THE SMALL OPEN END OF SAID CONICAL SHEET AND BRIDGING IN INTERIOR WALL SURFACES THEREOF, AND COMPLIANT
Claim 2
Dependent Claim
63 words
A DIAPHRAGM FOR ELECTRODYNAMIC LOUDSPEAKERS WHICH COMPRISES A THIN LIGHTWEIGHT SHEET IN THE GENERAL FORM OF AN OPEN CONE WITH CURVED WALL, A PERIPHERAL PORTION AT THE LARGE OPEN END OF SAID GENERALLY CONICAL SHEET BEING BENT TO FORM A FLANGE, A REINFORCING MEMBER POSITIONED ADJACENT THE SMALL OPEN END OF SAID CONICAL SHEET AND BRIDGING IN INTERIOR WALL SURFACES THEREOF, AND COMPLIANT
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) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |