Petrospec Engineering Ltd.
Records under this name other than the patents Petrospec Engineering Ltd. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned. None of them is counted in the 5 patents it holds.
Showing 1 to 3 of 3 · Back to Petrospec Engineering Ltd.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 9,696,135 | Method for analyzing nested optical cavities Lapsed on the fee record Ended Jul 4, 2021 · From the USPTO record | Lapsed on the fee record | Ended Jul 4, 2021 | From the USPTO record |
| US 7,561,776 | Method of preventing hydrogen darkening of optic fibre Lapsed on the fee record Ended Jul 14, 2017 · From the USPTO record | Lapsed on the fee record | Ended Jul 14, 2017 | From the USPTO record |
| US 7,290,601 | Braided thermocouple cable bundle Lapsed on the fee record Ended Nov 6, 2015 · From the USPTO record | Lapsed on the fee record | Ended Nov 6, 2015 | From the USPTO record |