US2989001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plunger pump
Assignee: Rheinstahl Wanheim GmbH
•
Filing: 1957-03-01
•
Granted: 1961-06-20
•
Expires: 1977-03-01
Abstract
No abstract record available.
Inventors
- 👤 Wilkenloh Wilhelm
- 👤 Jager Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:46
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/12; F04B53/125; F04B53/126; B; B66; B66F; B66F3/00; B66F3/24; B66F3/25; B66F3/42; E; E21; E21D; E21D15/00; E21D15/14; E21D15/44; E21D15/45; F04B49/00; F04B49/22; F04B49/24; F04B49/243; F04B5/00
Claims Analysis
Total Claims: 0
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US2820415A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |