US2952213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller
Assignee: McGraw Edison Co
•
Filing: 1957-03-08
•
Granted: 1960-09-13
•
Expires: 1977-03-08
Abstract
No abstract record available.
Inventors
- 👤 Albert B Goettl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:26
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/22; F04D29/2205; F04D29/2222; F04D29/2233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1271581A
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US1402719A
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US1426954A
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US1586160A
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GB332859A
Cited
US1922050A
Cited
US2130146A
Cited
US2466812A
Cited
US2456128A
Cited
US2796836A
Cited
US2687291A
Cited
US2718385A
Cited
US2755129A
Cited
US2766699A
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US2850228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |