Patent US2217231A successfully refreshed from Google Patents.
US2217231A
Expired / Lapsed
US
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Rubber impeller
Assignee: MORSE BROS MACHINERY Co
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Filing: 1938-04-04
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Granted: 1940-10-08
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Expires: 1958-04-04
Abstract
No abstract record available.
Inventors
- 👤 George G Morse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:01
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/16; B01; B01F; B01F27/00; B01F27/05; B01F27/051; B01F27/053; F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2227; F05; F05D; F05D2260/00; F05D2260/95; F05D2300/00; F05D2300/40; F05D2300/43; F05D2300/431
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-10-08 | 1944-04-08 | 1944-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-10-08 | 1948-04-08 | 1948-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-10-08 | 1952-04-08 | 1952-10-08 | $7700.00 | Window Closed / Lapsed |