US3018840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic duct and panel construction therefor
Assignee: AMF Inc
•
Filing: 1959-08-28
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Granted: 1962-01-30
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Expires: 1979-08-28
Abstract
No abstract record available.
Inventors
- 👤 Roland B Bourne
- 👤 John P Tyskewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:16
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; B; B64; B64F; B64F1/00; B64F1/26; E04B2001/8414; E04B2001/8423; E04B2001/8433
Claims Analysis
Total Claims: 0
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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) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |