Pason Systems Corp.
3 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.
7
Ending by 2030
Apr 2029
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 23, 2026The maintenance fee for Method and apparatus for correcting data points acquired during well drilling (US 9,062,524) comes due Dec 23, 2026. Unpaid by Jun 23, 2027, it lapses early.
- 1 fee due Feb 15, 2027The maintenance fee for Methods and Systems for Performing Automated Drilling of a Wellbore (US 11,725,496) comes due Feb 15, 2027. Unpaid by Aug 16, 2027, it lapses early.
- 1 fee due Apr 30, 2027The maintenance fee for Methods, systems, and media for controlling a toolface of a downhole tool (US 11,802,473) comes due Apr 30, 2027. Unpaid by Nov 1, 2027, it lapses early.
- 1 fee due May 21, 2027The maintenance fee for Detecting a mud motor stall (US 11,821,272) comes due May 21, 2027. Unpaid by Nov 22, 2027, it lapses early.
- 2 fees due Aug 2 to 20, 2027 · next Aug 2
- 1 fee due Sep 17, 2027The maintenance fee for Method, system, and medium for controlling rate of penetration of a drill bit (US 10,591,625) comes due Sep 17, 2027. Unpaid by Mar 17, 2028, it lapses early.
Recent changes
- 5 of the patents on this record were granted 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 8,502,981 | Methods and systems for chemical composition measurement and monitoring using a rotating filter spectrometer In force · From the USPTO record | In force | From the USPTO record | |
| US 9,250,132 | Methods and systems for chemical composition measurement and monitoring using a rotating filter spectrometer In force · From the USPTO record | In force | From the USPTO record | |
| US 8,184,293 | Methods and systems for chemical composition measurement and monitoring using a rotating filter spectrometer In force · From the USPTO record | In force | From the USPTO record | |
| US 8,896,839 | Multiplex Tunable Filter Spectrometer In force · Medium confidence | In force | Medium confidence | |
| US 9,568,419 | Method and apparatus for speciating hydrocarbons In force · From the USPTO record | In force | From the USPTO record | |
| US 9,651,481 | Method and apparatus for liberating gases from drilling fluid In force · From the USPTO record | In force | From the USPTO record | |
| US 8,381,838 | System and apparatus for directing the drilling of a well In force · From the USPTO record | In force | From the USPTO record | |
| US 8,632,625 | Method and apparatus for liberating gases from drilling fluid In force · From the USPTO record | In force | From the USPTO record | |
| US 8,907,951 | Method, system and computer-readable medium for providing a user interface for predicting the physical attributes of a proposed well In force · From the USPTO record | In force | From the USPTO record | |
| US 9,618,643 | Method and apparatus for decoding a signal sent from a measurement-while-drilling tool In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 35: 3 patents in force now held by others · 5 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 pending · 1 abandoned · 2 no status recorded