Collateral for a security interest recorded May 7, 2020 (Truist Bank).
Term ends Dec 4, 2026 · High confidence
20-year base term ended Nov 22, 2025
Held by Teradyne, Inc.
Filed Nov 22, 2005 as application 11/287,506 · Granted Apr 14, 2009
Base term plus 377 days of patent term adjustment (USPTO delay)
Today
2005
2026
Clock starts
Nov 22, 2005
Nov 22, 2005
Term ends
Dec 4, 2026
Dec 4, 2026
Granted
Apr 14, 2009
Apr 14, 2009
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
377
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.
2
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 runs 377 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 Nov 22, 2005, when this application, 11/287,506, was filed | Nov 22, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +377 days, USPTO patent term adjustment record | Dec 4, 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 | Dec 4, 2026 | High confidence |
This family
| US 7,519,878 | this patent Dec 2026 | Dec 2026 |
| Application PCT/US2006/029339 | PCT application no patent term | no patent term |
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 |
|---|---|---|---|
| Mar 3, 2006 Reel 17306, frame 660 | Rosen, Mark E. | Teradyne, Inc. | Assignment of Assignor's Interest |
| Dec 3, 2008 Reel 21912, frame 762 | Teradyne, Inc. | Bank of America, N.A., as Administrative Agent | Notice of Grant of Security Interest in Patents |
| May 13, 2009 Reel 22668, frame 750 | Bank Of America, N.a. | Teradyne, Inc. | Release of Security Interest |
| Apr 27, 2015 Reel 35507, frame 116 | Teradyne, Inc.; LitePoint Corporation | Barclays Bank PLC | Patent Security Agreement |
| Jun 28, 2019 Reel 49632, frame 940 | Barclays Bank PLC, as Collateral Agent | Teradyne, Inc.; Eagle Test Systems, Inc.; LitePoint Corporation; Nextest Systems Corporation; Genrad, LLC; Energid Technologies Corporation | Release of Security Interest in Intellectual Property |
| Jun 28, 2019 reel/frame not recorded | Barclays Bank PLC, as Collateral Agent | Teradyne, Inc. | Release of Security Interest in Intellectual Property |
| Jun 28, 2019 reel/frame not recorded | Barclays Bank PLC, as Collateral Agent | Eagle Test Systems, Inc. | Release of Security Interest in Intellectual Property |
| Jun 28, 2019 reel/frame not recorded | Barclays Bank PLC, as Collateral Agent | LitePoint Corporation | Release of Security Interest in Intellectual Property |
| Jun 28, 2019 reel/frame not recorded | Barclays Bank PLC, as Collateral Agent | Nextest Systems Corporation | Release of Security Interest in Intellectual Property |
| Jun 28, 2019 reel/frame not recorded | Barclays Bank PLC, as Collateral Agent | Genrad, LLC | Release of Security Interest in Intellectual Property |
| Jun 28, 2019 reel/frame not recorded | Barclays Bank PLC, as Collateral Agent | Energid Technologies Corporation | Release of Security Interest in Intellectual Property |
| May 7, 2020 Reel 52595, frame 632 | Teradyne, Inc. | Truist Bank | Security Interest |
| Aug 13, 2026 Reel 76171, frame 923 | Teradyne, Inc.; Eagle Test Systems, Inc.; LitePoint Corporation | Pnc Bank, National Association | 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
Dec 2026
Term ends Dec 4, 2026. No further fees fall due before then
Note
The 377 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
11
later US patents cite this one
That is above the median 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.