Term ends Mar 23, 2032 · High confidence
20-year base term ends Mar 23, 2032
Held by B&B Rail Tech, LLC
Filed Dec 20, 2013 as application 14/136,427 · Granted May 3, 2016
Base term, 20 years from filing
Today
2012
2032
Clock starts
Mar 23, 2012
Mar 23, 2012
Term ends
Mar 23, 2032
Mar 23, 2032
Granted
May 3, 2016
May 3, 2016
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.
2 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.
10
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. 2 of 3 maintenance fees are paid so far. 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 23, 2012, when applications 13/428,796, 13/428,809 and 13/428,828, the earliest non-provisional applications in its chain, were filed (this one was filed Dec 20, 2013) | Mar 23, 2032 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Mar 23, 2032 | High confidence |
This family
| US 9,752,286 | In force Mar 2035 | Mar 2035 |
| US 9,016,208 | In force Nov 2032 | Nov 2032 |
| US 9,422,673 | In force Dec 2033 | Dec 2033 |
| US 9,038,542 | In force Sep 2032 | Sep 2032 |
| US 9,328,465 | this patent Mar 2032 | Mar 2032 |
| US 9,745,150 | In force Aug 2032 | Aug 2032 |
| US 9,745,132 | In force Sep 2032 | Sep 2032 |
| US 10,316,471 | In force Sep 2032 | Sep 2032 |
8 of 10 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 |
|---|---|---|---|
| Dec 8, 2015 Reel 37231, frame 905 | Coots, William R. | B&B Metals, Inc. | Assignment of Assignor's Interest |
| Jun 15, 2026 Reel 74963, frame 148 | B&B Rail Tech, LLC | Graycliff Mezzanine IV (SBIC) LP, as Administrative Agent | Security Interest |
| Jun 16, 2026 Reel 74975, frame 802 | Auxo Rail Services II, LLC; Auxo Rail Holdings II, LLC; B&B Rail Tech, LLC | Mercantile Bank | Security Interest |
| Aug 13, 2026 Reel 75635, frame 966 | B & B Metals, Inc. | B&B Rail Tech, LLC | 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
Mar 2032
Term ends Mar 23, 2032. Maintenance fees still fall due before then
Citations
17
later US patents cite this one
That is top 25% of utility patents granted in 2016 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.