Donald T. Bray
20Patents
18h-index
9Co-inventors
70Inventor score
Filing activity: Jun 28, 1974 → Jul 29, 1992
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5275726A | Spiral wound element for separation | Performing Operations; Transporting | 119 | Expired |
| US4842736A | Spiral wound membrane | Performing Operations; Transporting | 72 | Expired |
| US4713175A | Water purifier comprising stages mounted side-by-side to unitary header | Chemistry; Metallurgy | 52 | Expired |
| US4842724A | Water purification apparatus | Chemistry; Metallurgy | 48 | Expired |
| US4711723A | Water purification system | Performing Operations; Transporting | 44 | Expired |
| US4046685A | Simultaneous production of multiple grades of purified water by reverse osmosis | Performing Operations; Transporting | 43 | Expired |
| US4190537A | Water storage control for reverse osmosis system | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4070280A | Manually operable reverse osmosis apparatus | Performing Operations; Transporting | 36 | Expired |
| US4548714A | Semipermeable membrane cartridge for use with a pressure container | Performing Operations; Transporting | 35 | Expired |
| US3966616A | Membrane cartridge | Performing Operations; Transporting | 32 | Expired |
| US4156645A | Conversion of sea water by reverse osmosis | Performing Operations; Transporting | 31 | Expired |
| US4230579A | Brine flow control for membrane separation system | Performing Operations; Transporting | 30 | Expired |
| USD337812S | Sink faucet | General | 26 | Expired |
| US4077883A | Reverse osmosis system with automatic pressure relief valve | Performing Operations; Transporting | 24 | Expired |
| US4828708A | Semipermeable membranes | Performing Operations; Transporting | 21 | Expired |
| US4208289A | Reverse osmosis apparatus employing a reciprocating membrane cartridge | Performing Operations; Transporting | 21 | Expired |
| US3959146A | Reverse osmosis system with automatic flushing | Performing Operations; Transporting | 20 | Expired |
| US3939074A | Apparatus for control of a reverse osmosis system | Performing Operations; Transporting | 20 | Expired |
| USD295438S | Water treatment assembly head | General | 13 | Expired |
| US4021351A | Membrane cartridge with improved central collection tube | Performing Operations; Transporting | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.