Also listed on Boart Longyear Company, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Feb 20, 2027 · High confidence
20-year base term ends Dec 14, 2026
Filed Dec 14, 2006 as application 11/610,680 · Granted Dec 8, 2009
Base term plus 68 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Dec 14, 2006
Dec 14, 2006
Term ends
Feb 20, 2027
Feb 20, 2027
Granted
Dec 8, 2009
Dec 8, 2009
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
68
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.
22
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 68 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 14, 2006, when this application, 11/610,680, was filed | Dec 14, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +68 days, USPTO patent term adjustment record | Feb 20, 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 | Feb 20, 2027 | High confidence |
This family
| US 7,628,228 | this patent Feb 2027 | Feb 2027 |
| Application PCT/US2007/087619 | PCT application no patent term | no patent term |
| US 7,918,288 | Lapsed on the fee record Apr 2015 | Apr 2015 |
| US 7,828,090 | In force Dec 2026 | Dec 2026 |
| US 7,958,954 | Lapsed on the fee record Jun 2015 | Jun 2015 |
| US 7,874,384 | In force no later than Dec 2026 | no later than Dec 2026 |
| US 7,909,119 | Lapsed on the fee record Mar 2015 | Mar 2015 |
| US 8,459,381 | Lapsed on the fee record Jun 2025 | Jun 2025 |
8 of 22 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 |
|---|---|---|---|
| Mar 13, 2007 Reel 19003, frame 876 | Drivdahl, K. Shayne; Rupp, Michael D. | Longyear TM, Inc. | Assignment of Assignor's Interest |
| Sep 10, 2010 Reel 24971, frame 793 | Drivdahl, K. Shayne; Rupp, Michael D. | Longyear TM, Inc. | Corrective Assignment to Correct the State of Incorporation of the Assignee to Be Delaware, Instead of Utah, as Incorrectly Listed on the Assignment Previously Recorded on Reel 019003 Frame 0876. Assignor(S) Hereby Confirms the State of Incorporation of the Assignee, Longyear TM, Inc., Is Delaware. |
| Jul 11, 2013 Reel 30775, frame 609 | Longyear TM, Inc. | Bank of America, N.A., as Agent | Notice of Grant of Security Interest in Patents |
| Sep 27, 2013 Reel 31306, frame 193 | Longyear TM, Inc. | U.S. Bank National Association, as Collateral Agent | Security Agreement |
| Oct 29, 2014 Reel 34084, frame 436 | Bank Of America, N.a. | Longyear TM, Inc. | Release of Security Interest Recorded at Reel/Frame 030775/0609 |
| Oct 29, 2014 Reel 34085, frame 704 | Longyear TM, Inc. | Wilmington Trust, N.a. | Security Interest (TERM Loan A) |
| Oct 29, 2014 Reel 34085, frame 775 | Longyear TM, Inc. | Wilmington Trust, N.a. | Security Interest (TERM Loan B) |
| Sep 8, 2017 Reel 43790, frame 390 | Longyear TM, Inc. | Wilmington Trust, National Association | Security Interest |
| Dec 31, 2018 Reel 47995, frame 550 | Longyear TM, Inc. | Wilmington Trust, National Association | Security Interest |
| Sep 8, 2021 Reel 57632, frame 481 | Longyear TM, Inc. | HPS Investment Partners, LLC | Security Interest |
| Sep 30, 2021 Reel 57687, frame 1 | Wilmington Trust, National Association, as Collateral Agent | Longyear TM, Inc. | Release of Security Interest |
| Sep 30, 2021 Reel 57878, frame 718 | U.S. Bank National Association, as Collateral Agent | Longyear TM, Inc. | Release of Security Interest |
| Nov 29, 2023 Reel 65708, frame 633 | Longyear TM, Inc. | Boart Longyear Company | Assignment of Assignor's Interest |
| Apr 11, 2024 Reel 67097, frame 641 | HPS Investment Partners, LLC | Longyear TM, Inc. | Release of Security Interest in Patents Recorded at R/F 057632/0481 |
| Apr 13, 2024 Reel 67342, frame 954 | Boart Longyear Company | Ally Bank, As Collateral Agent | Security Agreement |
| Mar 11, 2025 Reel 70480, frame 1 | Boart Longyear Company | Boart Longyear Manufacturing and Distribution 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
Feb 2027
Term ends Feb 20, 2027. No further fees fall due before then
Note
The 68 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
58
later US patents cite this one
That is top 25% 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.