US3457869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pumps
Assignee: TDK Micronas GmbH
•
Filing: 1967-02-13
•
Granted: 1969-07-29
•
Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 Ralph Walter Janetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:52
CPC Classifications
F; F04; F04D; F04D1/00; F04D1/006; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/445
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US827750A
Cited
GB190823696A
Cited
FR438635A
Cited
US1269063A
Cited
GB186243A
Cited
US1673151A
Cited
US2329373A
Cited
US3160107A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |