US2881708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regulable hydraulic apparatus
Assignee: Individual
•
Filing: 1952-07-08
•
Granted: 1959-04-14
•
Expires: 1972-07-08
Abstract
No abstract record available.
Inventors
- 👤 Wernert Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:54
CPC Classifications
F; F04; F04D; F04D9/00; F04D9/04; F04D9/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1573931A
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US1693540A
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GB528950A
Cited
GB544375A
Cited
US2330558A
Cited
US2470232A
Cited
US2628567A
Cited
US2666393A
Cited
US2612844A
Cited
US2757616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |