Also listed on Services Petroliers Schlumberger, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Sep 22, 2032 · High confidence
20-year base term ends Jun 25, 2032
Held by Schlumberger Technology Corporation, Schlumberger Canada Limited, Services Petroliers Schlumberger, Schlumberger Holdings Limited, Schlumberger Technology B.V. and Prad Research and Development Limited
Filed May 15, 2014 as application 14/127,170 · Granted Feb 2, 2016
Base term plus 89 days of patent term adjustment (USPTO delay)
Today
2012
2032
Clock starts
Jun 25, 2012
Jun 25, 2012
Term ends
Sep 22, 2032
Sep 22, 2032
Granted
Feb 2, 2016
Feb 2, 2016
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
89
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
2
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
This patent's term runs 89 days past its 20-year base term on prosecution delay. 2 of 3 maintenance fees are paid so far. Confidence: High. from the record
How we calculated this date
One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Jun 25, 2012, when application PCT/US2012/043939, the earliest non-provisional in its chain, was filed (this one was filed May 15, 2014) | Jun 25, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +89 days, USPTO patent term adjustment record | Sep 22, 2032 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 22, 2032 | High confidence |
This family
| Application PCT/US2012/043939 | PCT application no patent term | no patent term |
| US 9,250,120 | this patent Sep 2032 | Sep 2032 |
The applications whose file history this site holds. The family may have others.
Assignments
Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Jun 16, 2015 Reel 35920, frame 954 | Strong, Andrew; Lees, Gareth P | Schlumberger Technology Corporation; Schlumberger Canada Limited; Services Petroliers Schlumberger; Schlumberger Holdings Limited; Schlumberger Technology B.V.; Prad Research and Development Limited | Nunc Pro Tunc Assignment |
| Jun 16, 2015 reel/frame not recorded | Lees, Gareth P; Strong, Andrew | Schlumberger Technology Corporation | Nunc Pro Tunc Assignment |
| Jun 16, 2015 reel/frame not recorded | Lees, Gareth P; Strong, Andrew | Schlumberger Canada Limited | Nunc Pro Tunc Assignment |
| Jun 16, 2015 reel/frame not recorded | Lees, Gareth P; Strong, Andrew | Services Petroliers Schlumberger | Nunc Pro Tunc Assignment |
| Jun 16, 2015 reel/frame not recorded | Lees, Gareth P; Strong, Andrew | Schlumberger Holdings Limited | Nunc Pro Tunc Assignment |
| Jun 16, 2015 reel/frame not recorded | Lees, Gareth P; Strong, Andrew | Schlumberger Technology B.V. | Nunc Pro Tunc Assignment |
| Jun 16, 2015 reel/frame not recorded | Lees, Gareth P; Strong, Andrew | Prad Research and Development Limited | Nunc Pro Tunc Assignment |
| Jun 19, 2015 Reel 35978, frame 308 | Smith, Russell | Schlumberger Oilfield UK PLC | Intellectual Property and Confidential Information Agreement |
Sources
Google Patents · The patent document at USPTO · Assignment records at USPTO
USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup
Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Sep 2032
Term ends Sep 22, 2032. Maintenance fees still fall due before then
Note
The 89 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
29
later US patents cite this one
That is top 25% of utility patents granted in 2016 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.