US2853228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillatory pump
Assignee: Individual
•
Filing: 1945-05-28
•
Granted: 1958-09-23
•
Expires: 1965-05-28
Abstract
No abstract record available.
Inventors
- 👤 Underwood Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:46
CPC Classifications
F; F04; F04C; F04C9/00; F04C9/002; F04B; F04B43/00; F04B43/08; F04B43/084; F04B45/00; F04B45/02; F04C21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1719825A
Cited
US2324023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |