Also listed on Sunoco, Inc. (R&M), an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Oct 1, 2028 · High confidence
20-year base term ends Oct 1, 2028
Held by Braskem America, Inc.
Filed Oct 1, 2008 as application 12/286,774 · Granted Jul 6, 2010
Base term, 20 years from filing
Today
2008
2028
Clock starts
Oct 1, 2008
Oct 1, 2008
Term ends
Oct 1, 2028
Oct 1, 2028
Granted
Jul 6, 2010
Jul 6, 2010
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.
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: 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 1, 2008, when this application, 12/286,774, was filed | Oct 1, 2028 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Oct 1, 2028 | 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 |
|---|---|---|---|
| Jan 7, 2009 Reel 22067, frame 496 | Rhee, Aaron Sueng-joon; McLoughlin, Kimberly Miller; Majewski, Rita; Migone, Ruben A.; Kim, Sehyun | Sunoco, Inc. (R&M) | Assignment of Assignor's Interest |
| Jan 28, 2009 Reel 22167, frame 789 | Rhee, Aaron Seung-joon; McLoughlin, Kimberly Miller; Majewski, Rita; Migone, Ruben; Kim, Sehyun | Sunoco, Inc. (R&M) | Corrective Assignment to Correct the Assignment Previously Recorded on Reel 022067 Frame 0496. Assignor(S) Hereby Confirms the Assignment. |
| Nov 19, 2009 Reel 23544, frame 271 | Sunoco, Inc. (R&M) | Sunoco Chemicals, Inc. | Assignment of Assignor's Interest |
| Nov 17, 2010 Reel 25379, frame 923 | Sunoco, Inc. (R&M) | Braskem PP Americas, Inc. | Assignment of Assignor's Interest |
| Jan 10, 2011 Reel 25604, frame 572 | Braskem PP Americas, Inc. | Braskem America, Inc. | Merger |
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 1, 2028. No further fees fall due before then
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2010 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.