Also listed on Air Products and Chemicals, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Feb 9, 2023 (HCR Collateral Management, LLC).
Term ends May 14, 2029 · High confidence
20-year base term ends Jan 4, 2027
Held by Liquidia Technologies, Inc.
Filed Jan 30, 2009 as application 12/087,374 · Granted Feb 3, 2015
Base term plus 861 days of patent term adjustment (USPTO delay)
Today
2007
2029
Clock starts
Jan 4, 2007
Jan 4, 2007
Term ends
May 14, 2029
May 14, 2029
Granted
Feb 3, 2015
Feb 3, 2015
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
861
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.
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 runs 861 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 Jan 4, 2007, when application PCT/US2007/000402, the earliest non-provisional in its chain, was filed (this one was filed Jan 30, 2009) | Jan 4, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +861 days, USPTO patent term adjustment record | May 14, 2029 | 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 | May 14, 2029 | High confidence |
This family
| Application PCT/US2007/000402 | PCT application no patent term | no patent term |
| US 8,944,804 | this patent May 2029 | May 2029 |
| US 9,314,548 | In force Jan 2027 | Jan 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 |
|---|---|---|---|
| Dec 15, 2008 Reel 21981, frame 177 | Rothrock, Ginger D. | Liquidia Technologies, Inc. | Assignment of Assignor's Interest |
| Oct 21, 2014 Reel 33989, frame 320 | Air Products and Chemicals, Inc. | Liquidia Technologies, Inc. | Assignment of Assignor's Interest |
| Nov 14, 2014 Reel 34170, frame 301 | Robeson, Lloyd Mahlon | Air Products and Chemicals, Inc. | Assignment of Assignor's Interest |
| Feb 9, 2023 Reel 62643, frame 791 | Liquidia Technologies, Inc. | HCR Collateral Management, LLC | Security Interest |
| May 11, 2023 Reel 63627, frame 307 | HCR Collateral Management, LLC, as Retiring Subordinated Lender | Healthcare Royalty Partners IV, L.P., as Successor Subordinated Lender | Assignment of IP Security Agreement Recorded at Reel/Frame 062643/0791 |
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
May 2029
Term ends May 14, 2029. No further fees fall due before then
Note
The 861 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
101
later US patents cite this one
That is top 5% 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.