Patent US4841296A successfully refreshed from Google Patents.
Patent US2449772A successfully refreshed from Google Patents.
US2449772A
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Hermetically sealed submersible pumping structure
Assignee: Worthington Pump and Machinery Corp
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Filing: 1945-03-01
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Granted: 1948-09-21
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Expires: 1965-03-01
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Gilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:37
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/043; F04D29/044; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/10; F04D29/08; F04D29/086; F16; F16J; F16J15/00; F16J15/50; F16J15/52; F16J15/525; Y; Y10; Y10S; Y10S415/00; Y10S415/901; Y10T; Y10T74/00; Y10T74/18; Y10T74/1836; Y10T74/18384
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) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |