Patent US1368490A successfully refreshed from Google Patents.
US3398693A
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Concrete pumping apparatus
Assignee: Danken Inc
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Filing: 1966-08-01
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Granted: 1968-08-27
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Expires: 1986-08-01
Abstract
No abstract record available.
Inventors
- 👤 Kurt E Schumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
F; F04; F04B; F04B9/00; F04B9/08; F04B9/10; F04B9/109; F04B9/117; F04B9/1176; F04B9/1178; F01; F01L; F01L23/00; F03; F03C; F03C1/00; F03C1/22; F04B15/00; F04B15/02; F04B15/023; F04B53/00; F04B53/14; F04B7/00; F04B7/0019; F04B7/0026; Y; Y10; Y10S; Y10S417/00; Y10S417/90; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86839
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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |