US3477382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Way for axial flow impeller
Assignee: Individual
•
Filing: 1968-02-15
•
Granted: 1969-11-11
•
Expires: 1988-02-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:38
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F04; F04D; F04D29/00; F04D29/08; F04D29/16; F04D29/165; F04D29/168; F04D29/40; F04D29/52; F04D29/54; F04D29/548; F04D3/00; F04D3/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE313128C
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US2732999A
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US1567700A
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US1768130A
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GB355549A
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GB368160A
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US2030993A
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US2393933A
Cited
GB975837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |