30 patents currently held
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
The next term ends in Jul 2027. from the record
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
5
Ending by 2030
Jul 2027
Next term end
19
Patent families
When these terms end
Held patents by the year their term ends
notable patents
fee due within 90 days
all others
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
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.
Notable patents
Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
Notable
Ends Sep 2037 · High confidence
Also notable
Ends Jul 2035 · High confidence
Also notable
Ends Jan 2030 · High confidence
Railroad Coil Car Floating Floor Sheet
US 10,315,667
Cited by 15 later US patents, top 25% of utility patents granted in 2019 in our data, and renewed at 2 of 3 maintenance windows. Protection runs to 2037.
Gondola Car Clean-Out Door
US 10,017,191
Granted 2018 and renewed at every maintenance window due so far. Protection runs to 2035.
Railroad Well Car with Open Truss Sides
US 10,336,347
Granted 2019 and renewed at 2 of 3 maintenance windows. Protection runs to 2030.
Fee deadlines
Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
- 1 fee due Feb 4, 2027The maintenance fee for Open Top Hopper Railcar with Biased Door Seal and Enlarged Contoured End Door (US 9,096,238) comes due Feb 4, 2027. Unpaid by Aug 4, 2027, it lapses early.
- 1 fee due May 26, 2027The maintenance fee for Railroad Coupler Knuckle with External Weight Reducing Features and Method of Forming the Same (US 10,486,719) comes due May 26, 2027. Unpaid by Nov 26, 2027, it lapses early.
- 1 fee due Sep 17, 2027The maintenance fee for Coil Railcar with Floating Floor Sheet (US 10,589,757) comes due Sep 17, 2027. Unpaid by Mar 17, 2028, it lapses early.
- 2 fees due Oct 2 to 16, 2027 · next Oct 2
Recent changes
- 1 of the patents on this record was granted since Aug 16, 2026
What they patent
The 5 largest of its 19 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.
| Open Top Hopper Railcar with Lading Shedding Top Chord and Corner Cap and Integrated Door Operating Controls with Manual Override | 3 in force | to Jan 2032 |
| Side Contoured Open Top Hopper Railcar with Biased Door Seal and Enlarged Contoured End Door | 3 in force | to Jan 2031 |
| Railroad Truss Car with Open Truss Sides | 3 in force | to Jan 2030 |
| Railcar Having Cold Formed Center Sill with Stiffness Enhancing Structure | 2 in force | to Jun 2040 |
| Reinforced Railcar Side Stake | 2 in force | to Jul 2038 |
Patents held now
Soonest term end first.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,832,340 | Hopper Railcar with Automatic Individual Door System In force · High confidence | In force | High confidence | |
| US 8,757,067 | Railroad Well Car with Open Truss Sides In force · High confidence | In force | High confidence | |
| US 7,954,437 | Railroad Truss Car with Open Truss Sides In force · High confidence | In force | High confidence | |
| US 10,336,347 | Railroad Well Car with Open Truss Sides In force · High confidence | In force | High confidence | |
| US 8,342,105 | Open Top Hopper Railcar with Lading Shedding Top Chord and Corner Cap and Integrated Door Operating Controls with Manual Override In force · High confidence | In force | High confidence | |
| US 8,640,631 | Side Contoured Open Top Hopper Railcar with Biased Door Seal and Enlarged Contoured End Door In force · High confidence | In force | High confidence | |
| US 9,096,238 | Open Top Hopper Railcar with Biased Door Seal and Enlarged Contoured End Door In force · High confidence | In force | High confidence | |
| US 9,862,393 | Open Top Hopper Railcar with Biased Door Seal and Enlarged Contoured End Door In force · High confidence | In force | High confidence | |
| US 11,577,762 | Open Top Hopper Railcar with Lading Shedding Top Chord and Corner Cap and Integrated Door Operating Controls with Manual Override In force · Medium confidence | In force | Medium confidence | |
| US 9,669,845 | Open Top Hopper Railcar with Lading Shedding Top Chord and Corner Cap and Integrated Door Operating Controls with Manual Override In force · High confidence | In force | High confidence |
Also on record, not counted in the 30: 5 patents ended · 10 applications pending · 4 applications abandoned. List them
Sources and methods
Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.