Term ends Mar 4, 2031 · Medium confidence
20-year base term ends Feb 28, 2031
Why Medium: A parent in the chain could not be resolved.
Held by PerkinElmer U.S. LLC
Filed Oct 20, 2011 as application 13/277,594 · Granted Apr 23, 2013
Base term plus 4 days of patent term adjustment (USPTO delay)
Today
2011
2031
Clock starts
Feb 28, 2011
Feb 28, 2011
Term ends
Mar 4, 2031
Mar 4, 2031
Granted
Apr 23, 2013
Apr 23, 2013
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
4
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.
6
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 4 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. Confidence: Medium. 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 28, 2011, when application PCT/US2011/026463, the earliest non-provisional in its chain, was filed (this one was filed Oct 20, 2011); a parent in its chain could not be resolved (the next row) | Feb 28, 2031 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +4 days, USPTO patent term adjustment record | Mar 4, 2031 | 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 | Mar 4, 2031 | Medium confidence |
This family
| Application PCT/US2011/026463 | PCT application no patent term | no patent term |
| US 8,426,804 | this patent Mar 2031 | Mar 2031 |
| US 8,884,217 | In force Feb 2031 | Feb 2031 |
| US 9,190,253 | In force Feb 2031 | Feb 2031 |
| US 9,589,780 | In force Feb 2031 | Feb 2031 |
| US 9,916,971 | In force Feb 2031 | Feb 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 20, 2011 Reel 27093, frame 580 | Badiei, Hamid; Kahen, Kaveh | DH Technologies Development Pte Ltd. | Assignment of Assignor's Interest |
| Oct 21, 2011 Reel 27097, frame 324 | DH Technologies Development Pte. Ltd. | PerkinElmer Health Sciences, Inc. | Assignment of Assignor's Interest |
| Mar 13, 2023 Reel 66839, frame 109 | PerkinElmer U.S. LLC | Owl Rock Capital Corporation | Security Interest |
| Mar 28, 2023 Reel 63170, frame 26 | PerkinElmer Health Sciences Inc. | PerkinElmer U.S. LLC | 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
Mar 2031
Term ends Mar 4, 2031. No further fees fall due before then
Note
The 4 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 top 25% of utility patents granted in 2013 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.