US3471080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low noise generation fan
Assignee: RTX Corp
•
Filing: 1968-06-13
•
Granted: 1969-10-07
•
Expires: 1988-06-13
Abstract
No abstract record available.
Inventors
- 👤 Larry Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:22
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/522; Y; Y10; Y10S; Y10S415/00; Y10S415/913
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
BE545474A
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US2735612A
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CH52778A
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US1693352A
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GB226203A
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US1585218A
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GB368160A
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US2191341A
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US2339602A
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US2918254A
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US3045895A
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US3194487A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |