Term ends Mar 17, 2029 · High confidence
20-year base term ends Mar 17, 2029
Held by Isoplexis Corporation
Filed Nov 28, 2011 as application 13/305,415 · Granted Apr 28, 2015
Base term, 20 years from filing
Today
2009
2029
Clock starts
Mar 17, 2009
Mar 17, 2009
Term ends
Mar 17, 2029
Mar 17, 2029
Granted
Apr 28, 2015
Apr 28, 2015
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.
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.
31
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 Mar 17, 2009, when application 12/405,779, the earliest non-provisional in its chain, was filed (this one was filed Nov 28, 2011) | Mar 17, 2029 | 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 | Mar 17, 2029 | High confidence |
This family
| Application 12/020,284 | Abandoned not computed | not computed |
| US 8,612,161 | In force Jul 2030 | Jul 2030 |
| Application 12/405,779 | Abandoned not computed | not computed |
| US 8,940,481 | In force Jan 2028 | Jan 2028 |
| US 8,481,259 | In force Nov 2028 | Nov 2028 |
| US 9,017,973 | this patent Mar 2029 | Mar 2029 |
| US 8,900,810 | In force Jan 2028 | Jan 2028 |
| US 9,879,309 | In force Oct 2030 | Oct 2030 |
8 of 31 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Jun 5, 2012 Reel 28319, frame 701 | Gordon, Steven; Olejnik, Jerzy | Intelligent Bio-Systems, Inc. | Assignment of Assignor's Interest |
| May 17, 2018 Reel 47132, frame 861 | Intelligent Bio-Systems, Inc. | Qiagen Waltham, Inc. | Change of Name |
| Nov 8, 2018 Reel 47923, frame 815 | Qiagen Waltham, Inc. | Qiagen Sciences, LLC | Merger |
| May 28, 2021 Reel 56421, frame 929 | Isoplexis Corporation | Perceptive Credit Holdings III, LP | Security Agreement |
| Jul 30, 2021 Reel 57043, frame 629 | Qiagen Sciences, LLC | Isoplexis Corporation | Patent Purchase Agreement |
| Mar 24, 2023 Reel 63235, frame 942 | Perceptive Credit Holdings III, LP | Isoplexis Corporation | Release of Security 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 2029
Term ends Mar 17, 2029. No further fees fall due before then
Citations
27
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.