Patent US2533028A successfully refreshed from Google Patents.
US2533028A
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US
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Pumping system
Assignee: Ingersoll Rand Co
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Filing: 1948-11-24
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Granted: 1950-12-05
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Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 James W Mcconaghy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:59
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/06; F04D13/00; F04D13/12; F04D13/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-04 | 1954-06-05 | 1954-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-04 | 1958-06-05 | 1958-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-04 | 1962-06-05 | 1962-12-05 | $7700.00 | Window Closed / Lapsed |