US2939399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump
Assignee: Individual
•
Filing: 1956-02-23
•
Granted: 1960-06-07
•
Expires: 1976-02-23
Abstract
No abstract record available.
Inventors
- 👤 Rutschi Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
F; F04; F04D; F04D13/00; F04D13/02; F04D13/06; F04D13/0606; F04D13/0613; F05; F05D; F05D2240/00; F05D2240/60; F05D2240/61
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FI27641A
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US2120914A
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DE755956C
Cited
US2517233A
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US2669187A
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GB697634A
Cited
US2752857A
Cited
US2590855A
Cited
US2722892A
Cited
US2727164A
Cited
US2762311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |