US3399776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable snap-on filter for a hydraulic system
Assignee: ROBERT R KNUTH
•
Filing: 1965-09-02
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Granted: 1968-09-03
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Expires: 1985-09-02
Abstract
No abstract record available.
Inventors
- 👤 Robert R Knuth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:00
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/153; B01D29/00; B01D29/11; B01D29/114; B01D29/96; B01D2201/00; B01D2201/30; B01D2201/301; B01D2201/305
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR949892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |