Hydac Filtertechnik GmbH
1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 5 name spellings.
18
Ending by 2030
Jan 2027
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 2 fees due Dec 4, 2026
- 2 fees due Jan 2, 2027
- 1 fee due Feb 18, 2027The maintenance fee for Filter (US 9,108,128) comes due Feb 18, 2027. Unpaid by Aug 18, 2027, it lapses early.
- 1 fee due Mar 8, 2027The maintenance fee for Filter device and filter element (US 9,126,129) comes due Mar 8, 2027. Unpaid by Sep 8, 2027, it lapses early.
- 1 fee due Apr 20, 2027The maintenance fee for Filter device and filter element provided therefor (US 9,162,168) comes due Apr 20, 2027. Unpaid by Oct 20, 2027, it lapses early.
- 1 fee due May 19, 2027The maintenance fee for Filter element with a luminescent marker (US 10,478,760) comes due May 19, 2027. Unpaid by Nov 19, 2027, it lapses early.
- 1 fee due Sep 24, 2027The maintenance fee for Support structure for a filter element (US 10,596,493) comes due Sep 24, 2027. Unpaid by Mar 24, 2028, it lapses early.
- 4 fees due Oct 5 to 19, 2027 · next Oct 5
- 1 fee due Nov 5, 2027The maintenance fee for Method for producing a filter element (US 10,639,565) comes due Nov 5, 2027. Unpaid by May 5, 2028, it lapses early.
Recent changes
- 2 terms have ended since Aug 17, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,845,470 | Lubricating device In force · From the USPTO record | In force | From the USPTO record | |
| US RE46,080 | Filtering apparatus and filter element In force · From the USPTO record | In force | From the USPTO record | |
| US 7,926,327 | Apparatus for determining the filterability of fluids, in particular of transmission oils In force · From the USPTO record | In force | From the USPTO record | |
| US 7,926,515 | Modular unit In force · From the USPTO record | In force | From the USPTO record | |
| US 8,225,940 | Filter element In force · From the USPTO record | In force | From the USPTO record | |
| US 8,216,467 | Filter element In force · From the USPTO record | In force | From the USPTO record | |
| US 8,550,255 | Filter device and filter element In force · From the USPTO record | In force | From the USPTO record | |
| US 9,108,128 | Filter In force · From the USPTO record | In force | From the USPTO record | |
| US 8,127,806 | Ventilation device, particularly for fluid-storing reservoirs such as tanks In force · From the USPTO record | In force | From the USPTO record | |
| US 8,419,937 | Filter device and filter element In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 78: 1 patent in force now held by others · 23 lapsed for an unpaid fee · 26 ended at full term · 1 surrendered on reissue. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
4 pending · 4 no status recorded