US2957430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cement pump unit
Assignee: Individual
•
Filing: 1959-01-29
•
Granted: 1960-10-25
•
Expires: 1979-01-29
Abstract
No abstract record available.
Inventors
- 👤 Leon G Naef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:41
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1002; F01; F01L; F01L33/00; F01L33/04; F04B15/00; F04B15/02; F04B15/023; F04B53/1037; F04B53/1047; F04B53/105; F04B9/00; F04B9/08; F04B9/10; F04B9/103; F04B9/105; Y; Y10; Y10S; Y10S417/00; Y10S417/90
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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |