Also listed on Materials Solutions Limited, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Dec 21, 2033 · High confidence
20-year base term ends Oct 18, 2031
Filed Oct 18, 2011 as application 13/275,694 · Granted Mar 24, 2015
Base term plus 795 days of patent term adjustment (USPTO delay)
Today
2011
2033
Clock starts
Oct 18, 2011
Oct 18, 2011
Term ends
Dec 21, 2033
Dec 21, 2033
Granted
Mar 24, 2015
Mar 24, 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
795
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.
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 795 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 Oct 18, 2011, when this application, 13/275,694, was filed | Oct 18, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +795 days, USPTO patent term adjustment record | Dec 21, 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Dec 21, 2033 | High confidence |
This family
| US 8,986,604 | this patent Dec 2033 | Dec 2033 |
| US 9,388,479 | In force Oct 2031 | Oct 2031 |
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 |
|---|---|---|---|
| Oct 25, 2011 Reel 27119, frame 909 | Green, Gordon | Materials Solutions | Assignment of Assignor's Interest |
| May 12, 2015 Reel 35622, frame 273 | Materials Solutions | Materials Solutions Limited | Change of Name |
| 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 15, 2021 Reel 55950, frame 27 | 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
Dec 2033
Term ends Dec 21, 2033. No further fees fall due before then
Note
The 795 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
20
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.