Phase Shift Technology, Inc.
Records under this name other than patents Phase Shift Technology, Inc. holds now: patents now held by others, patents whose terms have ended, and its applications, pending or abandoned.
Showing 1 to 9 of 9 · Back to Phase Shift Technology, Inc.
| Patent | Title | Status | Expires | Confidence |
|---|---|---|---|---|
| US 7,595,891 | Measurement of the top surface of an object with/without transparent thin films in white light interferometry Term ended Term ended Nov 13, 2025 · From the USPTO record | Term ended | Term ended Nov 13, 2025 | From the USPTO record |
| US 6,856,405 | Non linear phase shift calibration for interferometric measurement of multiple surfaces Term ended Term ended Aug 7, 2023 · From the USPTO record | Term ended | Term ended Aug 7, 2023 | From the USPTO record |
| US 6,885,461 | Weighted least-square interferometric measurement of multiple surfaces Term ended Term ended Aug 7, 2023 · From the USPTO record | Term ended | Term ended Aug 7, 2023 | From the USPTO record |
| US 6,844,929 | Apparatus and method for holding and transporting thin opaque plates Term ended Term ended Jul 28, 2023 · From the USPTO record | Term ended | Term ended Jul 28, 2023 | From the USPTO record |
| US 6,847,458 | Method and apparatus for measuring the shape and thickness variation of polished opaque plates Term ended Term ended Mar 20, 2023 · From the USPTO record | Term ended | Term ended Mar 20, 2023 | From the USPTO record |
| US 6,061,133 | Interferometer light source Term ended Term ended Jan 26, 2019 · From the USPTO record | Term ended | Term ended Jan 26, 2019 | From the USPTO record |
| US 7,408,649 | Method and apparatus for optically analyzing a surface Lapsed on the fee record Ended Aug 5, 2016 · From the USPTO record | Lapsed on the fee record | Ended Aug 5, 2016 | From the USPTO record |
| US 5,471,307 | Sheet flatness measurement system and method Term ended Term ended no later than Nov 28, 2015 · Low confidence | Term ended | Term ended no later than Nov 28, 2015 | Low confidence |
| US 5,737,081 | Extended-source low coherence interferometer for flatness testing Term ended Term ended no later than Apr 7, 2018 · Low confidence | Term ended | Term ended no later than Apr 7, 2018 | Low confidence |