Also listed on Aeromee Development L.L.C., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Feb 27, 2028 · High confidence
20-year base term ended Jul 18, 2026
Held by Chemtron Research LLC
Filed Jul 18, 2006 as application 11/458,150 · Granted Oct 4, 2011
Base term plus 589 days of patent term adjustment (USPTO delay)
Today
2006
2028
Clock starts
Jul 18, 2006
Jul 18, 2006
Term ends
Feb 27, 2028
Feb 27, 2028
Granted
Oct 4, 2011
Oct 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
589
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 589 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 Jul 18, 2006, when this application, 11/458,150, was filed | Jul 18, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +589 days, USPTO patent term adjustment record | Feb 27, 2028 | 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 | Feb 27, 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 12, 2012 Reel 27520, frame 851 | Stephens, James H., JR. | Morphism LLC | Assignment of Assignor's Interest |
| Feb 2, 2012 Reel 27640, frame 538 | Morphism, LLC | Aeromee Development L.L.C. | Assignment of Assignor's Interest |
| Dec 29, 2015 Reel 37374, frame 237 | Aeromee Development L.L.C. | Chemtron Research LLC | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Feb 2028
Term ends Feb 27, 2028. No further fees fall due before then
Note
The 589 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
23
later US patents cite this one
That is above 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.