Also listed on Ion Systems, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Jan 7, 2029 · High confidence
20-year base term ends Mar 14, 2028
Held by Illinois Tool Works Inc.
Filed Mar 14, 2008 as application 12/075,967 · Granted Oct 12, 2010
Base term plus 299 days of patent term adjustment (USPTO delay)
Today
2008
2029
Clock starts
Mar 14, 2008
Mar 14, 2008
Term ends
Jan 7, 2029
Jan 7, 2029
Granted
Oct 12, 2010
Oct 12, 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
299
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 299 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 Mar 14, 2008, when this application, 12/075,967, was filed | Mar 14, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +299 days, USPTO patent term adjustment record | Jan 7, 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 | Jan 7, 2029 | 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 |
|---|---|---|---|
| Mar 14, 2008 Reel 20858, frame 578 | Gefter, Peter; Gehike, Scott; Levit, Lawrence | MKS Instruments | Assignment of Assignor's Interest |
| May 25, 2010 Reel 24434, frame 191 | MKS Instruments, Inc. | Ion Systems, Inc. | Assignment of Assignor's Interest |
| Dec 19, 2011 Reel 27408, frame 642 | Ion Systems, Inc. | Illinois Tool Works 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jan 2029
Term ends Jan 7, 2029. No further fees fall due before then
Note
The 299 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
35
later US patents cite this one
That is top 25% 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.