Also listed on Henry WDG, LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 14, 2029 · High confidence
20-year base term ends Mar 28, 2028
Held by West Development Group, LLC
Filed Mar 28, 2008 as application 12/058,159 · Granted Jan 4, 2011
Base term plus 292 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Mar 28, 2008
Mar 28, 2008
Term ends
Jan 14, 2029
Jan 14, 2029
Granted
Jan 4, 2011
Jan 4, 2011
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
292
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.
This patent's term runs 292 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 Mar 28, 2008, when this application, 12/058,159, was filed | Mar 28, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +292 days, USPTO patent term adjustment record | Jan 14, 2029 | 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 | Jan 14, 2029 | High confidence |
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 |
|---|---|---|---|
| Mar 28, 2008 Reel 20722, frame 736 | Rosecrans, Michael R. | West, Richard A. | Assignment of Assignor's Interest |
| Oct 1, 2014 Reel 33863, frame 318 | Henry WDG, LLC | Guggenheim Corporate Funding, LLC | Security Interest |
| Oct 2, 2014 Reel 33871, frame 525 | Henry WDG, LLC | General Electric Capital Corporation, as Administrative Agent | Security Interest |
| Sep 25, 2015 Reel 36688, frame 60 | General Electric Capital Corporation | Antares Capital LP | Assignment of Intellectual Property Security Agreement |
| Jul 11, 2016 Reel 39124, frame 185 | West Development Group | Henry WDG, LLC | Assignment of Assignor's Interest |
| Jul 14, 2016 Reel 39160, frame 296 | West, Richard A. | West Development Group, LLC | Assignment of Assignor's Interest |
| Oct 5, 2016 Reel 39943, frame 734 | Henry WDG, LLC | Royal Bank of Canada, as Collateral Agent | Security Interest |
| Oct 6, 2016 Reel 40242, frame 555 | Antares Capital LP, as Successor in Interest to General Electric Capital Corporation | Henry WDG, LLC | Intellectual Property Release of Security Interest Recorded at R/F 033871/0525 |
| Oct 6, 2016 Reel 40242, frame 662 | Guggenheim Corporate Funding, LLC | Henry WDG, LLC | Intellectual Property Release of Security Interest Recorded at R/F 033863/0318 |
| Sep 2, 2021 Reel 57397, frame 439 | Royal Bank of Canada, as Agent | Henry WDG, LLC | Release of Security Interest in Patents Recorded at R/F 039943/0734 |
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
Jan 2029
Term ends Jan 14, 2029. No further fees fall due before then
Note
The 292 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2011 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.