Also listed on Honda Giken Kogyo Kabushiki Kaisha, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Apr 8, 2027 · High confidence
20-year base term ended Dec 18, 2023
Held by Freeslate, Inc.
Filed Dec 18, 2003 as application 10/739,989 · Granted Mar 30, 2010
Base term plus 1207 days of patent term adjustment (USPTO delay)
Today
2003
2027
Clock starts
Dec 18, 2003
Dec 18, 2003
Term ends
Apr 8, 2027
Apr 8, 2027
Granted
Mar 30, 2010
Mar 30, 2010
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
1,207
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 1207 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 Dec 18, 2003, when this application, 10/739,989, was filed | Dec 18, 2023 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1207 days, USPTO patent term adjustment record | Apr 8, 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 | Apr 8, 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 |
|---|---|---|---|
| Apr 23, 2004 Reel 14550, frame 341 | Hagemeyer, Alfred; Carhart, Raymond E.; Yaccato, Karin; Strasser, Peter; Grasselli, Robert K. | Symyx Technologies, Inc. | Assignment of Assignor's Interest |
| May 21, 2004 Reel 14657, frame 395 | Brooks, Christopher; Phillips, Cory B. | Honda Giken Kogyo Kabushiki Kaisha | Assignment of Assignor's Interest |
| Jul 13, 2009 Reel 22939, frame 564 | Symyx Technologies, Inc. | Symyx Solutions, Inc. | Assignment of Assignor's Interest |
| Mar 10, 2010 Reel 24057, frame 911 | Symyx Solutions, Inc. | Freeslate, 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
Apr 2027
Term ends Apr 8, 2027. No further fees fall due before then
Note
The 1207 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
15
later US patents cite this one
That is above the median of utility patents granted in 2010 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.