Also listed on Hewlett Packard Enterprise Development LP, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 23, 2026 · High confidence
20-year base term ended Apr 30, 2023
Filed Apr 30, 2003 as application 10/427,572 · Granted Nov 1, 2011
Base term plus 1303 days of patent term adjustment (USPTO delay)
Today
2003
2026
Clock starts
Apr 30, 2003
Apr 30, 2003
Term ends
Nov 23, 2026
Nov 23, 2026
Granted
Nov 1, 2011
Nov 1, 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
1,303
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 1303 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 Apr 30, 2003, when this application, 10/427,572, was filed | Apr 30, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1303 days, USPTO patent term adjustment record | Nov 23, 2026 | 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 | Nov 23, 2026 | 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 |
|---|---|---|---|
| Jul 28, 2003 Reel 13834, frame 839 | Gargi, Ullas; Samadani, Ramin; Lin, Qian | Hewlett-packard Development Company, L.p. | Assignment of Assignor's Interest |
| Apr 16, 2004 Reel 14528, frame 164 | Memtec America Company | Usf Filtration and Separations Group Inc. | Change of Name |
| Nov 9, 2015 Reel 37079, frame 1 | Hewlett-packard Development Company, L.p. | Hewlett Packard Enterprise Development LP | Assignment of Assignor's Interest |
| Jan 13, 2017 Reel 41041, frame 716 | Hewlett Packard Enterprise Development LP | Ent. Services Development Corporation LP | 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
Nov 2026
Term ends Nov 23, 2026. No further fees fall due before then
Note
The 1303 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
199
later US patents cite this one
That is top 5% 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.