Patent US3076520A successfully refreshed from Google Patents.
US3076520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud speaker
Assignee: Individual
•
Filing: 1959-05-21
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Granted: 1963-02-05
•
Expires: 1979-05-21
Abstract
No abstract record available.
Inventors
- 👤 Claude C Farwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:32
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/32; H04R1/40; H04R1/403; H04R1/34; H04R1/345
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A LOUD SPEAKER COMPRISING A HOLLOW CONE WITH A BASE RIM, A HOLLOW TRUNCATED CONE HAVING A CLOSED TOP AND A BASE RIM REGISTERING WITH AND SECURED TO THE RIM OF THE FIRST SAID CONE, THEREBY FORMING AN AIR-TIGHT CONTAINER, A SUPPORT FRAME, AND A COMPLIANCE RING ATTACHED TO THE ENTIRE PERIPHERY OF SAID RIMS AT THE JUNCTION THEREOF AND TO SAID SUPPORT FRAME.
Claim 2
Dependent Claim
64 words
A LOUD SPEAKER COMPRISING A HOLLOW CONE WITH A BASE RIM, A HOLLOW TRUNCATED CONE HAVING A CLOSED TOP AND A BASE RIM REGISTERING WITH AND SECURED TO THE RIM OF THE FIRST SAID CONE, THEREBY FORMING AN AIR-TIGHT CONTAINER, A SUPPORT FRAME, AND A COMPLIANCE RING ATTACHED TO THE ENTIRE PERIPHERY OF SAID RIMS AT THE JUNCTION THEREOF AND TO SAID SUPPORT FRAME.
References Cited (Backward Citations)
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Cited
US1697659A
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US1641327A
Cited
US1673939A
Cited
US1925659A
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US2979150A
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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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |