US2652190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller wheel
Assignee: MASTER APPLIANCE Manufacturing Co
•
Filing: 1950-01-23
•
Granted: 1953-09-15
•
Expires: 1970-01-23
Abstract
No abstract record available.
Inventors
- 👤 Rudolph L Meltzer
- 👤 Henry E Meltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:46
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/26; F04D29/28; F04D29/281; F04D29/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB534486A
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US662525A
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GB191314103A
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US1513763A
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GB225640A
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GB250542A
Cited
US1941527A
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US2216747A
Cited
US2138814A
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US2160667A
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US2231062A
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US2272695A
Cited
US2424501A
Cited
US2486619A
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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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |