US2923246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vortex pump
Assignee: Chandler Evans Inc
•
Filing: 1958-05-16
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Granted: 1960-02-02
•
Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:48
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/18; F04D29/188; B; B64; B64D; B64D37/00; B64D37/02; B64D37/14; B64D37/16; F04D5/00; F04D5/002
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) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |