Patent US2988302A successfully refreshed from Google Patents.
US2988302A
Expired / Lapsed
US
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Silencing means for aircraft
Assignee: GEN SOUND CONTROL Inc
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Filing: 1959-01-14
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Granted: 1961-06-13
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Expires: 1979-01-14
Abstract
No abstract record available.
Inventors
- 👤 Cloyd D Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:08
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/36; B; B64; B64C; B64C21/00; B64C21/02; B64C21/025; B64C2230/00; B64C2230/04; B64C2230/06; B64C2230/14; B64C2230/22; B64D; B64D33/00; B64D33/02; B64D2033/0226; Y; Y02; Y02T; Y02T50/00; Y02T50/10
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) | 1964-06-12 | 1964-12-12 | 1965-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-12 | 1968-12-12 | 1969-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-12 | 1972-12-12 | 1973-06-13 | $7700.00 | Window Closed / Lapsed |