Term ends May 1, 2031 · High confidence
20-year base term ends Dec 23, 2029
Filed Aug 10, 2011 as application 13/142,612 · Granted Jan 27, 2015
Base term plus 494 days of patent term adjustment (USPTO delay)
Today
2009
2031
Clock starts
Dec 23, 2009
Dec 23, 2009
Term ends
May 1, 2031
May 1, 2031
Granted
Jan 27, 2015
Jan 27, 2015
base term
patent term adjustment
fee events
Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
494
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
7
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 494 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 Dec 23, 2009, when application PCT/US2009/069434, the earliest non-provisional in its chain, was filed (this one was filed Aug 10, 2011) | Dec 23, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +494 days, USPTO patent term adjustment record | May 1, 2031 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 1, 2031 | High confidence |
This family
| Application PCT/US2009/069434 | PCT application no patent term | no patent term |
| US 8,941,384 | this patent May 2031 | May 2031 |
| US 9,725,963 | In force Apr 2036 | Apr 2036 |
| US 9,000,296 | In force Oct 2033 | Oct 2033 |
| Application PCT/US2014/031808 | PCT application no patent term | no patent term |
| Application PCT/US2014/042921 | PCT application no patent term | no patent term |
| US 9,903,197 | In force Jul 2030 | Jul 2030 |
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 29, 2011 Reel 26520, frame 246 | Prammer, Manfred G. | Martin Scientific LLC | Assignment of Assignor's Interest |
| Apr 19, 2017 Reel 42052, frame 57 | Martin Scientific LLC | Baker Hughes Incorporated | Assignment of Assignor's Interest |
| Dec 14, 2018 Reel 47778, frame 861 | Baker Hughes Oilfield Operations LLC | BHGE Ventures & Growth LLC | Nunc Pro Tunc Assignment |
| Jan 22, 2019 Reel 48093, frame 118 | BHGE Ventures & Growth, LLC | Nextstream Wired Pipe, LLC | Assignment of Assignor's Interest |
| Feb 15, 2019 Reel 48356, frame 318 | Baker Hughes Incorporated | Baker Hughes, a GE Company, LLC | Change of Name |
| Mar 5, 2019 Reel 48504, frame 382 | Baker Hughes, a GE Company, LLC | Baker Hughes Oilfield Operations LLC | Assignment of Assignor's Interest |
| Apr 25, 2019 Reel 49008, frame 318 | BHGE Ventures & Growth, LLC | Nextstream Wired Pipe, LLC | Corrective Assignment to Correct the Name of the Assignee on Page 2 Above Signature Previously Recorded at Reel: 048093 Frame: 0118. Assignor(S) Hereby Confirms the Assignment. |
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
May 2031
Term ends May 1, 2031. No further fees fall due before then
Note
The 494 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
42
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.