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Patent US3521970A successfully refreshed from Google Patents.
US3521970A
Expired / Lapsed
US
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Submersible pump
Assignee: Red Jacket Manufacturing Co
•
Filing: 1968-12-30
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Granted: 1970-07-28
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Expires: 1988-12-30
Abstract
No abstract record available.
Inventors
- 👤 Elmer M Deters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:29
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/70; F04D29/708; F04D13/00; F04D13/02; F04D13/06; F04D13/08; F04D13/10; Y; Y10; Y10S; Y10S415/00; Y10S415/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2816509A
Cited
US2939400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-27 | 1974-01-26 | 1974-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-27 | 1978-01-26 | 1978-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-27 | 1982-01-26 | 1982-07-28 | $7700.00 | Window Closed / Lapsed |