Also listed on Salamander International Holdings LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 21, 2027 · High confidence
20-year base term ends Oct 19, 2027
Held by Salamander IP Holdings LLC
Filed Oct 19, 2007 as application 11/975,676 · Granted Dec 22, 2009
Base term plus 33 days of patent term adjustment (USPTO delay)
Today
2007
2027
Clock starts
Oct 19, 2007
Oct 19, 2007
Term ends
Nov 21, 2027
Nov 21, 2027
Granted
Dec 22, 2009
Dec 22, 2009
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
33
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 33 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 Oct 19, 2007, when this application, 11/975,676, was filed | Oct 19, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +33 days, USPTO patent term adjustment record | Nov 21, 2027 | 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 21, 2027 | 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 |
|---|---|---|---|
| Feb 18, 2008 Reel 20524, frame 627 | Karanikas, John Michael; Colmenares, Tulio Rafael; Zhang, Etuan; Marino, Marian; Roes, Augustinus Wilhelmus Maria; Ryan, Robert Charles; Beer, Gary Lee; Dombrowski, Robert James | Shell Oil Company | Assignment of Assignor's Interest |
| May 30, 2019 Reel 49317, frame 371 | Shell Oil Company | Salamander Solutions Inc. | Assignment of Assignor's Interest |
| Jan 13, 2023 Reel 63074, frame 512 | Salamander Solutions Inc.; Salamander Solutions Limited | Salamander International LLC | Assignment of Assignor's Interest |
| Mar 21, 2023 Reel 63045, frame 760 | Salamander International LLC | Salamander International Holdings LLC | Assignment of Assignor's Interest |
| Mar 22, 2023 Reel 63141, frame 685 | Salamander International Holdings LLC | DMCX7318 Ltd. | Assignment of Assignor's Interest |
| Mar 23, 2023 Reel 63147, frame 759 | DMCX7318 Ltd. | Salamander IP Holdings 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.
What's changing
Nov 2027
Term ends Nov 21, 2027. No further fees fall due before then
Note
The 33 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
249
later US patents cite this one
That is top 5% of utility patents granted in 2009 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.