Kellogg Brown & Root LLC
6 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
Recorded under 3 name spellings.
65
Ending by 2030
Dec 2026
Next term end
When these terms end
Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
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.
- 2 fees due Nov 14 to 16, 2026 · next Nov 14
- 1 fee due Dec 11, 2026The maintenance fee for Co-production of anode and fuel grade petroleum coke in a delayed coker unit (US 10,316,253) comes due Dec 11, 2026. Unpaid by Jun 11, 2027, it lapses early.
- 2 fees due Jan 11 to 16, 2027 · next Jan 11
- 3 fees due Feb 11 to 20, 2027 · next Feb 11
- 6 fees due Mar 8 to 15, 2027 · next Mar 8
- 4 fees due Apr 13 to 27, 2027 · next Apr 13
- 1 fee due May 24, 2027The maintenance fee for Phenol Resin Treatment Improvement (US 9,193,652) comes due May 24, 2027. Unpaid by Nov 24, 2027, it lapses early.
- 3 fees due Jul 2 to 30, 2027 · next Jul 2
- 2 fees due Aug 20, 2027
- 1 fee due Sep 17, 2027The maintenance fee for High temperature inlet distributor (US 10,589,246) comes due Sep 17, 2027. Unpaid by Mar 17, 2028, it lapses early.
- 3 fees due Oct 16 to 26, 2027 · next Oct 16
- 1 fee due Nov 3, 2027The maintenance fee for Particulate cooler (US 9,328,974) comes due Nov 3, 2027. Unpaid by May 3, 2028, it lapses early.
Recent changes
- 3 terms have ended since Aug 16, 2026
Patents held now
Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,381,854 | Selective hydrogenation of alpha-methyl-styrene to cumene In force · From the USPTO record | In force | From the USPTO record | |
| US 8,733,264 | Method and apparatus for variable floating structures In force · From the USPTO record | In force | From the USPTO record | |
| US 7,770,651 | Method and apparatus for sub-sea processing In force · From the USPTO record | In force | From the USPTO record | |
| US 7,950,609 | Acoustic dampening pipe shoe In force · From the USPTO record | In force | From the USPTO record | |
| US 7,484,773 | Self purging expansion joint In force · From the USPTO record | In force | From the USPTO record | |
| US 7,491,315 | Dual riser FCC reactor process with light and mixed light/heavy feeds In force · From the USPTO record | In force | From the USPTO record | |
| US 7,628,224 | Shallow/intermediate water multipurpose floating platform for arctic environments In force · From the USPTO record | In force | From the USPTO record | |
| US 7,820,034 | Diluent from heavy oil upgrading In force · From the USPTO record | In force | From the USPTO record | |
| US 7,628,204 | Wastewater disposal with in situ steam production In force · From the USPTO record | In force | From the USPTO record | |
| US 7,722,690 | Methods for producing synthesis gas In force · From the USPTO record | In force | From the USPTO record |
Also on record, not counted in the 185: 6 patents in force now held by others · 19 lapsed for an unpaid fee · 75 ended at full term · 1 surrendered on reissue. List them
Sources and methods
Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand.
How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
Published applications
US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.
21 pending · 1 abandoned · 37 no status recorded