Also listed on Materials Solutions Limited, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jun 8, 2033 · High confidence
20-year base term ends Feb 5, 2029
Filed Feb 5, 2009 as application 12/365,914 · Granted Oct 17, 2017
Base term plus 1584 days of patent term adjustment (USPTO delay)
Today
2009
2033
Clock starts
Feb 5, 2009
Feb 5, 2009
Term ends
Jun 8, 2033
Jun 8, 2033
Granted
Oct 17, 2017
Oct 17, 2017
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
1,584
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.
This patent's term runs 1584 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 Feb 5, 2009, when this application, 12/365,914, was filed | Feb 5, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1584 days, USPTO patent term adjustment record | Jun 8, 2033 | 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 | Jun 8, 2033 | 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 |
|---|---|---|---|
| Feb 5, 2009 Reel 22209, frame 312 | Illston, Trevor John | Materials Solutions | Assignment of Assignor's Interest |
| Jul 14, 2015 Reel 36076, frame 423 | Materials Solutions Limited | Materials Solutions (Worcester) Limited | Assignment of Assignor's Interest |
| Jul 15, 2015 Reel 36096, frame 949 | Materials Solutions (Worcester) Limited | Materials Solutions Limited | Change of Name |
| Feb 26, 2018 Reel 45037, frame 441 | Materials Solutions Limited, UK | Siemens Aktiengesellschaft | Assignment of Assignor's Interest |
| Apr 21, 2021 Reel 55997, frame 14 | Siemens Aktiengesellschaft | Siemens Energy Global GmbH & Co. KG | Assignment of Assignor's Interest |
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
Jun 2033
Term ends Jun 8, 2033. Maintenance fees still fall due before then
Note
The 1584 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
14
later US patents cite this one
That is top 25% of utility patents granted in 2017 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.