Superior Graphite Co.
Records under this name other than patents Superior Graphite Co. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 8,617,309 | Cement Compositions Including Resilient Graphitic Carbon Fraction Formerly held In force · High confidence | In force | High confidence | |
| US 8,999,898 | Drilling Fluid Additive for Loss Circulation and Wellbore Strengthening Formerly held In force · High confidence | In force | High confidence | |
| US 9,458,703 | Compressible Carbonaceous Particulate Material and Method of Making Same Formerly held In force · High confidence | In force | High confidence | |
| US 9,206,681 | Wellbore Fluid Testing Assembly Lapsed on the fee record Ended Dec 8, 2023 · High confidence | Lapsed on the fee record | Ended Dec 8, 2023 | High confidence |
| US 7,617,869 | Methods for Extracting Oil from Tar Sand Lapsed on the fee record Ended Nov 17, 2021 · High confidence | Lapsed on the fee record | Ended Nov 17, 2021 | High confidence |
| US 6,660,434 | Engineered Carbonaceous Materials and Power Sources Using These Materials Term ended Term ended May 24, 2021 · High confidence | Term ended | Term ended May 24, 2021 | High confidence |
| US 6,194,358 | Hopper car anti-bridging method and coating Term ended Term ended Dec 9, 2018 · From the USPTO record | Term ended | Term ended Dec 9, 2018 | From the USPTO record |
| US 6,169,059 | High-temperature, water-based lubricant and process for making the same Term ended Term ended Nov 19, 2018 · From the USPTO record | Term ended | Term ended Nov 19, 2018 | From the USPTO record |
| US 6,350,722 | High-temperature, water-based lubricant and process for making the same Term ended Ended no later than Nov 19, 2018 · From the USPTO record | Term ended | Ended no later than Nov 19, 2018 | From the USPTO record |
| US RE43,044 | Electrically conductive pavement mixture Lapsed on the fee record Ended Dec 6, 2017 · From the USPTO record | Lapsed on the fee record | Ended Dec 6, 2017 | From the USPTO record |