Also listed on Peroxychem LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Mar 21, 2033 · High confidence
20-year base term ends Mar 21, 2033
Held by Evonik Corporation
Filed Mar 21, 2013 as application 13/848,092 · Granted Nov 21, 2017
Base term, 20 years from filing
Today
2013
2033
Clock starts
Mar 21, 2013
Mar 21, 2013
Term ends
Mar 21, 2033
Mar 21, 2033
Granted
Nov 21, 2017
Nov 21, 2017
base term
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 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.
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 is its 20-year base term, with no adjustment for 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 Mar 21, 2013, when this application, 13/848,092, was filed | Mar 21, 2033 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 21, 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 |
|---|---|---|---|
| Jun 24, 2013 Reel 30670, frame 184 | Pisanova, Elena; Block, Philip | FMC Corporation | Assignment of Assignor's Interest |
| Mar 3, 2014 Reel 32379, frame 931 | Peroxychem LLC | Macquarie US Trading LLC | Short Form Patent Security Agreement |
| Mar 31, 2014 Reel 32558, frame 681 | FMC Corporation | Peroxychem LLC | Assignment of Assignor's Interest |
| Oct 21, 2015 Reel 36847, frame 594 | Peroxychem LLC | Bank of America, N.A., as Administrative Agent | Security Interest |
| Nov 4, 2015 Reel 36953, frame 766 | Macquarie US Trading LLC, as Collateral Agent | Peroxychem LLC | Release of Security Interest |
| Oct 2, 2019 Reel 50605, frame 305 | Peroxychem LLC | Barclays Bank PLC, as Administrative Agent | Security Interest |
| Oct 2, 2019 Reel 50606, frame 329 | Bank of America, N.A., as Agent | Peroxychem LLC | Release of Security Interest |
| Feb 3, 2020 Reel 51777, frame 957 | Barclays Bank PLC, as Administrative Agent | Peroxychem LLC | Release of Security Interest in Patents Recorded at R/F 050605/0305 |
| Sep 16, 2022 Reel 61456, frame 680 | Peroxychem LLC | Evonik Active Oxygens, LLC | Change of Name |
| May 11, 2023 Reel 63628, frame 619 | Peroxychem LLC | Evonik Active Oxygens, LLC | Corrective Assignment to Correct the Assignee's Address Previously Recorded at Reel: 061456 Frame: 0680. Assignor(S) Hereby Confirms the Assignment. |
| May 12, 2023 Reel 63633, frame 920 | Evonik Active Oxygens, LLC | Evonik Active Oxygens, LLC | Change of Address |
| Oct 24, 2024 Reel 69003, frame 481 | Evonik Active Oxygens, LLC | Evonik Corporation | 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.
What's changing
Mar 2033
Term ends Mar 21, 2033. Maintenance fees still fall due before then
Citations
6
later US patents cite this one
That is above the median 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.