Patent US3435777A successfully refreshed from Google Patents.
US3435777A
Expired / Lapsed
US
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Pump,particularly hydraulic pump for drilling plant
Assignee: Mhwirth GmbH
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Filing: 1967-05-15
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Granted: 1969-04-01
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Expires: 1987-05-15
Abstract
No abstract record available.
Inventors
- 👤 Martin Schaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:13
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/04; Y; Y10; Y10S; Y10S411/00; Y10S411/03; Y10S411/916; Y10T; Y10T292/00; Y10T292/20; Y10T292/218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2304992A
Cited
US2499614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |