Portable Composite Structures, Inc.
Records under this name other than patents Portable Composite Structures, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 5 of 5 · Back to Portable Composite Structures, Inc.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 10,156,104 | Centralizer with collaborative spring force Lapsed on the fee record Ended Dec 18, 2022 · From the USPTO record | Lapsed on the fee record | Ended Dec 18, 2022 | From the USPTO record |
| US 9,909,372 | Well casing stop collar Lapsed on the fee record Ended Mar 6, 2022 · From the USPTO record | Lapsed on the fee record | Ended Mar 6, 2022 | From the USPTO record |
| US 9,725,967 | Centralizers for Centralizing Well Casings Formerly held Lapsed on the fee record Ended Aug 8, 2021 · High confidence | Lapsed on the fee record | Ended Aug 8, 2021 | High confidence |
| US 9,458,672 | Method and devices for centralizing a casing Lapsed on the fee record Ended Oct 4, 2020 · From the USPTO record | Lapsed on the fee record | Ended Oct 4, 2020 | From the USPTO record |
| US 9,341,032 | Centralizer with collaborative spring force Lapsed on the fee record Ended May 17, 2020 · From the USPTO record | Lapsed on the fee record | Ended May 17, 2020 | From the USPTO record |