PreTechnology, Inc.
8Patents
1Active
8Granted
33Portfolio score
Filing activity: Dec 10, 1991 → Feb 24, 2020
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5733434A | Apparatus and method for cleaning semiconductor wafers | Chemistry; Metallurgy | 43 | Expired |
| US5186192A | Apparatus for cleaning silicon wafer | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5725753A | Apparatus and method for cleaning semiconductor wafers | Chemistry; Metallurgy | 35 | Expired |
| US6003527A | Cleaning apparatus and a cleaning method | Emerging Cross-Sectional Technologies | 30 | Expired |
| US5927305A | Cleaning apparatus | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5985811A | Cleaning solution and cleaning method | Chemistry; Metallurgy | 16 | Expired |
| US6050276A | Apparatus and method for cleaning a precision substrate | Performing Operations; Transporting | 9 | Expired |
| US10979769B2 | Method and apparatus for monitoring and tracking consumption of digital content | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.