Also listed on Lxdata Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Dec 26, 2019 (Deutsche Bank Trust Company Americas).
Term ends Oct 24, 2028 · Medium confidence
20-year base term ends Oct 24, 2028
Why Medium: A parent in the chain could not be resolved.
Held by Weatherford Canada Ltd.
Filed Jul 23, 2013 as application 13/948,706 · Granted Aug 19, 2014
Base term, 20 years from filing
Today
2008
2028
Clock starts
Oct 24, 2008
Oct 24, 2008
Term ends
Oct 24, 2028
Oct 24, 2028
Granted
Aug 19, 2014
Aug 19, 2014
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
4
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 is its 20-year base term, with no adjustment for prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: Medium. 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 Oct 24, 2008, when application 12/257,906, the earliest non-provisional in its chain, was filed (this one was filed Jul 23, 2013); a parent in its chain could not be resolved (the next row) | Oct 24, 2028 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | 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 | Oct 24, 2028 | Medium confidence |
This family
| Application 12/257,906 | Abandoned not computed | not computed |
| US 8,335,406 | In force Oct 2028 | Oct 2028 |
| US 8,611,703 | Lapsed on the fee record Dec 2025 | Dec 2025 |
| US 8,811,776 | this patent Oct 2028 | Oct 2028 |
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 |
|---|---|---|---|
| Jul 23, 2013 Reel 30860, frame 56 | Zhou, Bai; Miville, Sebastien; Vincelette, Andre | Lxdata Inc., | Assignment of Assignor's Interest |
| Jan 14, 2014 Reel 32018, frame 804 | Lxdata Inc. | Weatherford Canada Partnership | Amalgamation-Dissolution-General Conveyance and Assumption Agreement |
| Jul 27, 2017 Reel 43111, frame 828 | Weatherford Canada Partnership | Weatherford Canada Ltd. | Assignment of Assignor's Interest |
| Dec 18, 2019 Reel 51891, frame 89 | Weatherford Technology Holdings LLC; Weatherford Netherlands B.V.; Weatherford Norge As; High Pressure Integrity Inc.; Precision Energy Services Inc.; Weatherford Canada Ltd.; Weatherford Switzerland Trading and Development GmbH; Precision Energy Services ULC; Weatherford U.K. Limited | Wells Fargo Bank National Association as Agent | Security Interest |
| Dec 26, 2019 Reel 51419, frame 140 | Weatherford Technology Holdings, LLC; Weatherford Netherlands B.V.; Weatherford Norge As; High Pressure Integrity, Inc.; Precision Energy Services, Inc.; Weatherford Canada Ltd.; Weatherford Switzerland Trading and Development GmbH; Precision Energy Services ULC; Weatherford U.K. Limited | Deutsche Bank Trust Company Americas, as Administrative Agent | Security Interest |
| Aug 28, 2020 Reel 54288, frame 302 | Weatherford Technology Holdings, LLC; Weatherford Netherlands B.V.; Weatherford Norge As; High Pressure Integrity, Inc.; Precision Energy Services, Inc.; Weatherford Canada Ltd.; Weatherford Switzerland Trading and Development GmbH; Precision Energy Services ULC; Weatherford U.K. Limited | Wilmington Trust, National Association | Security Interest |
| Aug 28, 2020 Reel 53838, frame 323 | Wells Fargo Bank, National Association | Weatherford Technology Holdings, LLC; Weatherford Netherlands B.V.; Weatherford Norge As; High Pressure Integrity, Inc.; Precision Energy Services, Inc.; Weatherford Canada Ltd.; Weatherford Switzerland Trading and Development GmbH; Precision Energy Services ULC; Weatherford U.K. Limited | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Weatherford Technology Holdings, LLC | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Weatherford Netherlands B.V. | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Weatherford Norge As | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | High Pressure Integrity, Inc. | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Precision Energy Services, Inc. | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Weatherford Canada Ltd. | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Weatherford Switzerland Trading and Development GmbH | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Precision Energy Services ULC | Release of Security Interest |
| Aug 28, 2020 reel/frame not recorded | Wells Fargo Bank, National Association | Weatherford U.K. Limited | Release of Security Interest |
| Oct 1, 2021 Reel 57683, frame 423 | Wilmington Trust, National Association | Weatherford Technology Holdings, LLC; Weatherford Netherlands B.V.; Weatherford Norge As; High Pressure Integrity, Inc.; Precision Energy Services, Inc.; Weatherford Canada Ltd.; Weatherford Switzerland Trading and Development GmbH; Precision Energy Services ULC; Weatherford U.K. Limited | Release of Security Interest |
| Oct 1, 2021 Reel 57683, frame 706 | Weatherford Technology Holdings, LLC; Weatherford Netherlands B.V.; Weatherford Norge As; High Pressure Integrity, Inc.; Precision Energy Services, Inc.; Weatherford Canada Ltd.; Weatherford Switzerland Trading and Development GmbH; Weatherford U.K. Limited | Wilmington Trust, National Association | Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Weatherford Technology Holdings, LLC | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Weatherford Netherlands B.V. | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Weatherford Norge As | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | High Pressure Integrity, Inc. | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Precision Energy Services, Inc. | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Weatherford Canada Ltd. | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Weatherford Switzerland Trading and Development GmbH | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Precision Energy Services ULC | Release of Security Interest |
| Oct 1, 2021 reel/frame not recorded | Wilmington Trust, National Association | Weatherford U.K. Limited | Release of Security Interest |
| Apr 26, 2023 Reel 63470, frame 629 | Deutsche Bank Trust Company Americas | Wells Fargo Bank, National Association | Patent Security Interest Assignment 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.
What's changing
Oct 2028
Term ends Oct 24, 2028. No further fees fall due before then
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2014 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.