US2980135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulically controlled apparatus
Assignee: Hydraulic Unit Specialties Co
•
Filing: 1958-09-18
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Granted: 1961-04-18
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Expires: 1978-09-18
Abstract
No abstract record available.
Inventors
- 👤 Francis H Tennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:54
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/20; E02F9/22; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/42; E02F3/422; E02F3/43; E02F3/431; F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87177
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2267284A
Cited
US2367682A
Cited
US2359802A
Cited
US2543989A
Cited
US2581430A
Cited
US2590454A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |