US2545609A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipiston motor or pump
Assignee: Individual
•
Filing: 1947-12-09
•
Granted: 1951-03-20
•
Expires: 1967-12-09
Abstract
No abstract record available.
Inventors
- 👤 Ernst F Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:11
CPC Classifications
F; F01; F01B; F01B3/00; F01B3/0002; F01B3/0005; F01B3/0008; F01B3/0011; F01B3/0017; F01B3/0029; F01B3/0082; F01B3/0085; F01B3/0088; F01B3/04; F01B3/06
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) | 1954-03-19 | 1954-09-18 | 1955-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-19 | 1958-09-18 | 1959-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-19 | 1962-09-18 | 1963-03-20 | $7700.00 | Window Closed / Lapsed |