thyssenkrupp Elevator Corporation
12 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded as renamed to TK Elevator Corporation (2021)
4
Ending by 2030
May 2028
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 Nov 21 to 28, 2026 · next Nov 21
- 1 fee due Dec 4, 2026The maintenance fee for Drag rollers for escalators, moving walkways, and other conveyors (US 10,308,483) comes due Dec 4, 2026. Unpaid by Jun 4, 2027, it lapses early.
- 1 fee due Feb 6, 2027The maintenance fee for Elevator System (US 10,370,221) comes due Feb 6, 2027. Unpaid by Aug 6, 2027, it lapses early.
- 1 fee due May 26, 2027The maintenance fee for Method for Determining a Stator Current Vector for Starting a Synchronous Machine of a Drive of a Passenger Transportation Apparatus (US 10,486,936) comes due May 26, 2027. Unpaid by Nov 26, 2027, it lapses early.
- 1 fee due Aug 4, 2027The maintenance fee for Elevator Belt Position Tracking System (US 10,549,953) comes due Aug 4, 2027. Unpaid by Feb 4, 2028, it lapses early.
- 1 fee due Oct 19, 2027The maintenance fee for Snap-fit elevator lanterns (US 9,315,362) comes due Oct 19, 2027. Unpaid by Apr 19, 2028, it lapses early.
- 2 fees due Nov 5, 2027
Recent changes
- 3 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 8,617,325 | Actively damped tension member In force · From the USPTO record | In force | From the USPTO record | |
| US 8,276,715 | Method and apparatus for assigning elevator hall calls based on time metrics In force · From the USPTO record | In force | From the USPTO record | |
| US 8,863,909 | Braking device for braking a lift car In force · From the USPTO record | In force | From the USPTO record | |
| US 7,975,808 | Saturation control for destination dispatch systems In force · From the USPTO record | In force | From the USPTO record | |
| US 10,308,483 | Drag rollers for escalators, moving walkways, and other conveyors In force · From the USPTO record | In force | From the USPTO record | |
| US D856,388 | Lubricant Director for an Elevator Guide Rail In force · High confidence | In force | High confidence | |
| US 9,315,362 | Snap-fit elevator lanterns In force · From the USPTO record | In force | From the USPTO record | |
| US D868,128 | Lubricant Director for an Elevator Guide Rail In force · High confidence | In force | High confidence | |
| US 9,452,909 | Safety related elevator serial communication technology In force · From the USPTO record | In force | From the USPTO record | |
| US 10,106,372 | Elevator systems and methods for operating same In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 25: 12 patents in force now held by others · 73 lapsed for an unpaid fee · 20 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.
35 abandoned · 15 no status recorded