US3019849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loudspeaker diaphragm suspension
Assignee: General Dynamics Corp
•
Filing: 1959-07-16
•
Granted: 1962-02-06
•
Expires: 1979-07-16
Abstract
No abstract record available.
Inventors
- 👤 John A King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:43
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/16; H04R7/18; H04R7/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1142883A
Cited
US1708943A
Cited
US1735417A
Cited
US1744032A
Cited
US2069242A
Cited
US2815823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |