Also listed on Guava Technologies, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Sep 27, 2027 · High confidence
20-year base term ends Sep 27, 2027
Held by Cytek Biosciences, Inc.
Filed May 1, 2012 as application 13/461,713 · Granted Nov 11, 2014
Base term, 20 years from filing
Today
2007
2027
Clock starts
Sep 27, 2007
Sep 27, 2007
Term ends
Sep 27, 2027
Sep 27, 2027
Granted
Nov 11, 2014
Nov 11, 2014
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.
3
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 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 Sep 27, 2007, when application 11/862,680, the earliest non-provisional in its chain, was filed (this one was filed May 1, 2012) | Sep 27, 2027 | 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 | Sep 27, 2027 | High confidence |
This family
| US 7,847,923 | In force Nov 2028 | Nov 2028 |
| US 8,184,271 | In force no later than Sep 2027 | no later than Sep 2027 |
| US 8,885,153 | this patent Sep 2027 | Sep 2027 |
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 |
|---|---|---|---|
| May 20, 2012 Reel 28237, frame 673 | Pittaro, Richard; Goldman, Bruce; Lefebvre, Ray; King, David A. | Guava Technologies, Inc. | Assignment of Assignor's Interest |
| May 20, 2012 Reel 28237, frame 680 | Guava Technologies, Inc. | Millipore Corporation | Merger |
| May 20, 2012 Reel 28238, frame 97 | Millipore Corporation | EMD Millipore Corporation | Change of Name |
| Feb 1, 2018 Reel 45225, frame 156 | EMD Millipore Corporation | EMD Millipore Corporation | Change of Address |
| Jun 6, 2019 Reel 49399, frame 1 | EMD Millipore Corporation | Luminex Corporation | Assignment of Assignor's Interest |
| Sep 27, 2023 Reel 65044, frame 762 | Luminex Corporation; Amnis, LLC; Iris Biotech Corporation | Cytek Biosciences, Inc. | 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
Sep 2027
Term ends Sep 27, 2027. No further fees fall due before then
Citations
17
later US patents cite this one
That is above the median of utility patents granted in 2014 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.