US2905260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loud speaker diaphragm
Assignee: MUTER CO
•
Filing: 1955-02-24
•
Granted: 1959-09-22
•
Expires: 1975-02-24
Abstract
No abstract record available.
Inventors
- 👤 Philip B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:45
CPC Classifications
H; H04; H04R; H04R7/00; H04R7/02; H04R7/12; H04R7/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030501A
Cited
US2071829A
Cited
GB510707A
Cited
GB513389A
Cited
DE863084C
Cited
US2549139A
Cited
DE806861C
Cited
FR1059899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |