Patent US2233268A successfully refreshed from Google Patents.
US2233268A
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Pumping mechanism
Assignee: Ingersoll Rand Co
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Filing: 1939-03-24
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Granted: 1941-02-25
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Expires: 1959-03-24
Abstract
No abstract record available.
Inventors
- 👤 Anthony L Mchugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:02
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/20; F04D29/08; F04D29/10; F04D29/106
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) | 1944-02-25 | 1944-08-26 | 1945-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-02-25 | 1948-08-26 | 1949-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-02-25 | 1952-08-26 | 1953-02-25 | $7700.00 | Window Closed / Lapsed |