US2552703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double-action duplex pump
Assignee: Individual
•
Filing: 1948-08-31
•
Granted: 1951-05-15
•
Expires: 1968-08-31
Abstract
No abstract record available.
Inventors
- 👤 Alonso Sergio Delahanty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:35
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/02; F04B5/00; F04B5/02; F04B53/00; F04B53/10; F04B53/102; F04B53/1022; F04B53/1087; F04B9/00; F04B9/02; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18088; Y10T74/18096
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |