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Patent US1914919A successfully refreshed from Google Patents.
US1914919A
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US
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Centrifugal pump
Assignee: Allis Chalmers Corp
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Filing: 1931-10-30
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Granted: 1933-06-20
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Expires: 1951-10-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Heermans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:33
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0005; F04D15/0022; F04D29/00; F04D29/40; F04D29/42; F04D29/44; F04D29/445; F05; F05D; F05D2250/00; F05D2250/50; F05D2250/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-06-19 | 1936-12-19 | 1937-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-19 | 1940-12-19 | 1941-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-19 | 1944-12-19 | 1945-06-20 | $7700.00 | Window Closed / Lapsed |