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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 13 name spellings.
7
Ending by 2030
May 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 25, 2026
- 1 fee due Jan 16, 2027The maintenance fee for Determining the delivery rate of a pump (US 10,352,324) comes due Jan 16, 2027. Unpaid by Jul 16, 2027, it lapses early.
- 4 fees due Feb 20 to 27, 2027 · next Feb 20
- 1 fee due Mar 17, 2027The maintenance fee for Plastic pump housing consisting of an inner casing, an outer casing and filling material therebetween (US 10,415,589) comes due Mar 17, 2027. Unpaid by Sep 17, 2027, it lapses early.
- 2 fees due Apr 1 to 13, 2027 · next Apr 1
- 2 fees due May 3 to 19, 2027 · next May 3
- 1 fee due Jun 30, 2027The maintenance fee for Rotor, reluctance machine and production method for a rotor (US 10,523,099) comes due Jun 30, 2027. Unpaid by Jan 3, 2028, it lapses early.
- 1 fee due Sep 30, 2027The maintenance fee for Membrane separation method with speed control of pressure exchanger and feed pump (US 10,604,425) comes due Sep 30, 2027. Unpaid by Mar 31, 2028, it lapses early.
Recent changes
- 2 terms have ended since Aug 16, 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 7,828,531 | Vertical centrifugal pump assembly In force · From the USPTO record | In force | From the USPTO record | |
| US 7,991,586 | Device for transmitting measured values In force · From the USPTO record | In force | From the USPTO record | |
| US 8,021,133 | Feed pump In force · From the USPTO record | In force | From the USPTO record | |
| US 8,342,476 | Stirrer stand In force · From the USPTO record | In force | From the USPTO record | |
| US 8,870,521 | Sealing system for centrifugal pumps In force · From the USPTO record | In force | From the USPTO record | |
| US 8,710,776 | Method for controlling a motor In force · From the USPTO record | In force | From the USPTO record | |
| US 8,449,264 | Method for delivering fluids using a centrifugal pump In force · From the USPTO record | In force | From the USPTO record | |
| US 8,889,404 | Method and apparatus for producing biogas In force · From the USPTO record | In force | From the USPTO record | |
| US 9,783,772 | Control of biogas plants In force · From the USPTO record | In force | From the USPTO record | |
| US 9,176,044 | Device and method for detecting deposits In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 43: 1 patent in force now held by others · 34 lapsed for an unpaid fee · 75 ended at full term. 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.
2 abandoned · 24 no status recorded