US2847936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic centrifugal pump
Assignee: Allis Chalmers Corp
•
Filing: 1953-08-14
•
Granted: 1958-08-19
•
Expires: 1973-08-14
Abstract
No abstract record available.
Inventors
- 👤 Richter Walther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:17
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/02; H02K44/06; F; F04; F04D; F04D13/00; F04D13/02; F04D13/021; F04D13/024; F04D13/026; F04D13/027; F04D7/00; F04D7/02; F04D7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1307210A
Cited
US2481172A
Cited
US2651258A
Cited
GB661756A
Cited
US2730951A
Cited
US2669931A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |