Keithley Instruments, LLC
2 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 under 6 name spellings.
27
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.
- 1 fee due Dec 6, 2026The maintenance fee for Multi-stage current measurement architecture (US 11,668,733) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
- 2 fees due Jan 2 to 18, 2027 · next Jan 2
- 1 fee due Feb 6, 2027The maintenance fee for Auto setting of alarm limits (US 10,373,474) comes due Feb 6, 2027. Unpaid by Aug 6, 2027, it lapses early.
- 3 fees due Mar 3 to 26, 2027 · next Mar 3
- 1 fee due Apr 29, 2027The maintenance fee for Determination and rendering of scan groups (US 10,462,541) comes due Apr 29, 2027. Unpaid by Oct 29, 2027, it lapses early.
- 2 fees due May 19 to 24, 2027 · next May 19
- 2 fees due Jun 24 to 26, 2027 · next Jun 24
- 2 fees due Sep 1 to 12, 2027 · next Sep 1
- 4 fees due Oct 16 to 30, 2027 · next Oct 16
- 1 fee due Nov 10, 2027The maintenance fee for SMU RF transistor stability arrangement (US 9,335,364) comes due Nov 10, 2027. Unpaid by May 10, 2028, it lapses early.
Recent changes
- 3 of the patents on this record were granted since Aug 16, 2026
- 1 term has 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 7,568,946 | Triaxial cable with a resistive inner shield In force · From the USPTO record | In force | From the USPTO record | |
| US 7,498,854 | High speed solid state switch In force · From the USPTO record | In force | From the USPTO record | |
| US 7,616,088 | Low leakage inductance transformer In force · From the USPTO record | In force | From the USPTO record | |
| US 7,482,961 | Digital feedthrough cancellation In force · From the USPTO record | In force | From the USPTO record | |
| US 7,508,240 | Power mains zero-crossing detector In force · From the USPTO record | In force | From the USPTO record | |
| US 7,683,650 | Measurement instrument with synchronized interference signals In force · From the USPTO record | In force | From the USPTO record | |
| US 7,616,014 | Pulsed I-V measurement method and apparatus In force · From the USPTO record | In force | From the USPTO record | |
| US 7,616,008 | Digital auto balance bridge In force · From the USPTO record | In force | From the USPTO record | |
| US 7,834,641 | Phase-gain calibration of impedance/admittance meter In force · From the USPTO record | In force | From the USPTO record | |
| US 7,614,274 | Method for calibration adjustment verification In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 100: 2 patents in force now held by others · 19 lapsed for an unpaid fee · 60 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.
8 pending · 6 no status recorded