Patent US3072213A successfully refreshed from Google Patents.
US3072213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker cone suspension
Assignee: General Electric Co
•
Filing: 1959-09-28
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Granted: 1963-01-08
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Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Adelore F Petrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:46
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A LOUDSPEAKER CONE SUSPENSION COMPRISING A MATERIAL HAVING FOUR OR MORE CONCENTRICALLY ARRANGED CORRUGATIONS, SAID CORRUGATIONS BEING OF SUCCESSIVELY DECRESING SIZE FROM THE OUTERMOST CORRUGATION TOWARD THE INNER-
Claim 2
Dependent Claim
28 words
A LOUDSPEAKER CONE SUSPENSION COMPRISING A MATERIAL HAVING FOUR OR MORE CONCENTRICALLY ARRANGED CORRUGATIONS, SAID CORRUGATIONS BEING OF SUCCESSIVELY DECRESING SIZE FROM THE OUTERMOST CORRUGATION TOWARD THE INNER-
References Cited (Backward Citations)
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GB310127A
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US2030501A
Cited
US2582130A
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GB700888A
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DE1001326B
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US2922850A
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |