Patent US3130811A successfully refreshed from Google Patents.
US3130811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker cone suspension
Assignee: General Electric Co
•
Filing: 1962-11-19
•
Granted: 1964-04-28
•
Expires: 1982-11-19
Abstract
No abstract record available.
Inventors
- 👤 Adelore F Petrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:04
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A LOUDSPEAKER CONE SUSPENSION COMPRISING A CONICALLY SHAPED MEMBER OF RESILIENT MATERIAL PROVIDED WITH A PLURALITY OF CONCENTRICALLY ARRANGED CORRUGATIONS IN THE OUTERMOST REGION THEREOF, ONE OR MORE OF THE INTERMEDIATE CORRUGATIONS HAVING SIDES THAT ARE SLOPED MORE GRADUALLY THAN THE SIDES OF THE END CORRUGATIONS.
Claim 2
Dependent Claim
46 words
A LOUDSPEAKER CONE SUSPENSION COMPRISING A CONICALLY SHAPED MEMBER OF RESILIENT MATERIAL PROVIDED WITH A PLURALITY OF CONCENTRICALLY ARRANGED CORRUGATIONS IN THE OUTERMOST REGION THEREOF, ONE OR MORE OF THE INTERMEDIATE CORRUGATIONS HAVING SIDES THAT ARE SLOPED MORE GRADUALLY THAN THE SIDES OF THE END CORRUGATIONS.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |