David A. Barclay
23Patents
8h-index
21Co-inventors
75Inventor score
Filing activity: Jan 12, 1984 → Jul 2, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5796080A | Microwave apparatus for controlling power levels in individual multiple cells | Performing Operations; Transporting | 77 | Expired |
| US6288379A | Use of continuously variable power in microwave assisted chemistry | Physics | 46 | Expired |
| US6084226A | Use of continuously variable power in microwave assisted chemistry | Physics | 32 | Expired |
| US5215715A | Microwave heated digesting system for digesting materials to be analyzed | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5972711A | Microwave assisted chemical processes | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6207462A | Microwave apparatus and method for analysis of asphalt-aggregate compositions | Emerging Cross-Sectional Technologies | 12 | Expired |
| US5531976A | Preparation of alumina having increased porosity | Chemistry; Metallurgy | 10 | Expired |
| US6190917A | Microwave apparatus and method for analysis of asphalt-aggregate compositions | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5840583A | Microwave assisted chemical processes | Emerging Cross-Sectional Technologies | 7 | Expired |
| US9237608B2 | Pressure stepped microwave assisted digestion | Performing Operations; Transporting | 5 | Active |
| US4746503A | Method of treating alumina to increase slurry life | Chemistry; Metallurgy | 4 | Expired |
| US5569325A | Process for growing crystals | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5316752A | Process for preparing mixed oxides | Chemistry; Metallurgy | 2 | Expired |
| US7829040B2 | High temperature high pressure vessel for microwave assisted chemistry | Emerging Cross-Sectional Technologies | 1 | Active |
| US9943823B2 | Pressure stepped microwave assisted digestion | Performing Operations; Transporting | 1 | Active |
| US10067043B2 | Pressure stepped microwave assisted digestion | Performing Operations; Transporting | 1 | Active |
| US9340432B2 | Process for the synthesis of magnesium aluminate spinels | Chemistry; Metallurgy | 1 | Active |
| US10527530B2 | Pressure stepped microwave assisted digestion | Performing Operations; Transporting | 1 | Active |
| US11091396B2 | High strength shaped aluminas and a method of producing such high strength shaped aluminas | Chemistry; Metallurgy | 0 | Active |
| US11884594B2 | High strength shaped aluminas and a method of producing such high strength shaped aluminas | Chemistry; Metallurgy | 0 | Active |
| US10023785B2 | Thixotropic agents and methods of use | Chemistry; Metallurgy | 0 | Active |
| US4608511A | Energy filter for a Geiger-Muller tube | Physics | 0 | Expired |
| US8921119B2 | High temperature high pressure vessel for microwave assisted chemistry | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.