Also listed on CTB McGraw Hill, an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Jul 30, 2021 (Bank of America, N.A.).
Term ends Apr 11, 2029 · High confidence
20-year base term ended May 23, 2025
Held by McGraw Hill LLC
Filed May 23, 2005 as application 11/134,624 · Granted Jul 19, 2011
Base term plus 1419 days of patent term adjustment (USPTO delay)
Today
2005
2029
Clock starts
May 23, 2005
May 23, 2005
Term ends
Apr 11, 2029
Apr 11, 2029
Granted
Jul 19, 2011
Jul 19, 2011
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
1,419
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.
34
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 1419 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 May 23, 2005, when this application, 11/134,624, was filed | May 23, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1419 days, USPTO patent term adjustment record | Apr 11, 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 | Apr 11, 2029 | High confidence |
This family
| US 6,577,846 | Term ended Sep 2021 | Sep 2021 |
| US 6,999,954 | Term ended Aug 2022 | Aug 2022 |
| US 7,149,468 | Term ended Dec 2023 | Dec 2023 |
| US 7,573,616 | Term ended Feb 2024 | Feb 2024 |
| US 7,417,774 | Term ended Feb 2024 | Feb 2024 |
| US 8,128,414 | In force Feb 2030 | Feb 2030 |
| Application 10/701,690 | Abandoned not computed | not computed |
| Application 10/701,434 | Abandoned not computed | not computed |
8 of 34 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Aug 23, 2005 Reel 16661, frame 284 | Scheuring, Sylvia Tidwell; Creamer, Roger Packard; Lee, Richard James; Schultz, David; Waddington, Darlene | CTB/McGraw-Hill | Assignment of Assignor's Interest |
| Mar 26, 2013 Reel 30088, frame 771 | McGraw-Hill School Education Holdings, LLC | Bank of Montreal | Security Agreement |
| Jan 16, 2014 Reel 32040, frame 330 | McGraw-Hill School Education Holdings, LLC; CTB/McGraw-Hill, LLC; Grow.net, Inc. | Bank Of Montreal, As Collateral Agent | Security Agreement |
| Jul 2, 2014 Reel 33232, frame 307 | CTB/McGraw-Hill LLC | McGraw-Hill School Education Holdings LLC | Assignment of Assignor's Interest |
| Oct 8, 2015 Reel 36755, frame 610 | McGraw-Hill School Education Holdings LLC | CTB/McGraw-Hill LLC | Assignment of Assignor's Interest |
| Oct 9, 2015 Reel 36762, frame 940 | CTB/McGraw-Hill LLC | Data Recognition Corporation | Assignment of Assignor's Interest |
| Oct 13, 2015 Reel 36778, frame 662 | Data Recognition Corporation | McGraw-Hill School Education Holdings LLC | Assignment of Assignor's Interest |
| Jun 29, 2016 Reel 39205, frame 841 | McGraw-Hill School Education Holdings, LLC | Credit Suisse AG, Cayman Islands Branch | Patent Security Agreement |
| Jun 29, 2016 Reel 39205, frame 871 | Bank of Montreal | McGraw-Hill School Education Holdings, LLC | Release of Patent Security Agreement |
| Jun 29, 2016 Reel 39206, frame 35 | Bank of Montreal | McGraw-Hill School Education Holdings, LLC; CTB/McGraw-Hill LLC; Grow.net, Inc. | Release of Patent Security Agreement |
| Jun 29, 2016 reel/frame not recorded | Bank of Montreal | CTB/McGraw-Hill LLC | Release of Patent Security Agreement |
| Jun 29, 2016 reel/frame not recorded | Bank of Montreal | Grow.net, Inc. | Release of Patent Security Agreement |
| Jan 2, 2020 Reel 51402, frame 282 | McGraw Hill LLC | Credit Suisse AG, Cayman Islands Branch, as Collateral Agent | Security Interest |
| Jan 22, 2020 Reel 51586, frame 564 | McGraw-Hill School Education Holdings, LLC; McGraw-Hill School Education LLC | McGraw Hill LLC | Merger and Change of Name |
| Jan 28, 2020 Reel 51723, frame 187 | McGraw Hill LLC | McGraw Hill LLC | Change of Assignee Address |
| Jan 22, 2021 Reel 55000, frame 643 | McGraw Hill LLC | Wilmington Trust, National Association, as Collateral Agent | Security Interest |
| Jul 30, 2021 Reel 57041, frame 925 | McGraw Hill LLC | Bank Of America, N.a. | Security Agreement |
| Jul 30, 2021 Reel 57041, frame 934 | McGraw Hill LLC | Bank Of America, N.a. | Abl Security Agreement |
| Jul 30, 2021 Reel 57041, frame 977 | McGraw Hill LLC | The Bank of New York Mellon Trust Company, N.A. | Notes Security Agreement |
| Aug 3, 2021 Reel 57070, frame 283 | Wilmington Trust, National Association | McGraw Hill LLC | Release of Security Interest |
| Aug 23, 2021 Reel 57263, frame 646 | Credit Suisse AG, Cayman Islands Branch, as Agent | McGraw Hill LLC (as Successor to McGraw-Hill School Education Holdings, LLC) | Release of Patent Security Agreement (First Lien) |
| Aug 23, 2021 Reel 57263, frame 664 | Credit Suisse AG, Cayman Islands Branch, as Agent | McGraw Hill LLC | Release of Patent Security Agreement (First Lien) |
| Aug 9, 2024 Reel 68522, frame 31 | ACHIEVE3000, Inc.; Actively Learn Inc.; McGraw Hill LLC | The Bank of New York Mellon Trust Company, N.A., as Notes Collateral Agent | Security Interest (NOTES) |
| Oct 12, 2026 Reel 76682, frame 802 | McGraw Hill LLC; ACHIEVE3000, Inc.; Actively Learn Inc. | The Bank of New York Mellon Trust Company, N.A., as Notes Collateral Agent | Notes Patent Security Agreement |
| Oct 12, 2026 Reel 76682, frame 872 | Bank of New York Mellon Trust Company, N.A., as Notes Collateral Agent | McGraw Hill LLC | Release of Security Interest in Patents |
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 2029
Term ends Apr 11, 2029. No further fees fall due before then
Note
The 1419 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
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.