US2423639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pump
Assignee: EDDINGTON METAL SPECIALTY Co
•
Filing: 1945-03-15
•
Granted: 1947-07-08
•
Expires: 1965-03-15
Abstract
No abstract record available.
Inventors
- 👤 Czarnecki Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:31
CPC Classifications
F; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F01C21/0854; F01C21/0863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US268659A
Cited
US1102288A
Cited
US1671399A
Cited
US2149337A
Cited
US2170786A
Cited
US2333323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |