Term ends Oct 24, 2028 · High confidence
20-year base term ends Oct 24, 2028
No current holder resolved from the recorded chain.
Filed Oct 20, 2010 as application 12/908,043 · Granted Jun 21, 2011
Base term, 20 years from filing
Today
2008
2028
Clock starts
Oct 24, 2008
Oct 24, 2008
Term ends
Oct 24, 2028
Oct 24, 2028
Granted
Jun 21, 2011
Jun 21, 2011
base term
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
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.
4
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 Oct 24, 2008, when application 12/258,035, the earliest non-provisional in its chain, was filed (this one was filed Oct 20, 2010) | Oct 24, 2028 | 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 | Oct 24, 2028 | High confidence |
This family
| US 7,902,525 | In force Apr 2029 | Apr 2029 |
| Application PCT/US2009/061587 | PCT application no patent term | no patent term |
| US 7,964,854 | this patent Oct 2028 | Oct 2028 |
| US 7,943,911 | In force Oct 2028 | Oct 2028 |
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 1, 2011 Reel 27308, frame 379 | Landauer, Inc. | BMO Harris Bank N.A. | Security Agreement |
| Nov 6, 2017 Reel 44368, frame 295 | BMO Harris Bank N.A | Landauer, Inc. | 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
Oct 2028
Term ends Oct 24, 2028. No further fees fall due before then
Citations
5
later US patents cite this one
That is below the median 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.