US2724338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination centrifugal-turbine pump
Assignee: Roy E Roth Co
•
Filing: 1949-05-19
•
Granted: 1955-11-22
•
Expires: 1969-05-19
Abstract
No abstract record available.
Inventors
- 👤 Leo C Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
F; F04; F04D; F04D5/00; F04D5/002; F04D5/007; F05; F05B; F05B2250/00; F05B2250/50; F05B2250/503
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |