John J. Freeman
48Patents
11h-index
47Co-inventors
75Inventor score
Filing activity: Feb 27, 1985 → Feb 7, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4922169A | Method and apparatus for driving a brushless motor | Electricity | 85 | Expired |
| USRE35132E | Solid, thin chemiluminescent device | General | 31 | Expired |
| US5962710A | Method of preparing salicyloylamino acids | Chemistry; Metallurgy | 31 | Expired |
| US4622499A | Method and apparatus for controlling a motor | Electricity | 29 | Expired |
| US6819517B2 | Disc drive servo track writer gas leak detector and method | Physics | 26 | Expired |
| US4699896A | Manufacture of fibrous activated carbons | Textiles; Paper | 26 | Expired |
| US5121302A | Solid, thin chemiluminescent device | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6693208B2 | Compounds and compositions for delivering active agents | Chemistry; Metallurgy | 20 | Expired |
| US6013708A | Cationic water-soluble polymer precipitation in salt solutions | Chemistry; Metallurgy | 19 | Expired |
| US5733462A | Cationic water-soluble polymer precipitation in salt solutions | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6570360B1 | Self-synchronizing AC synchronous driver for DC brushless motors | Electricity | 13 | Expired |
| US8410309B2 | Phenoxy carboxylic acid compounds and compositions for delivering active agents | Chemistry; Metallurgy | 11 | Active |
| USD330602S | Chemiluminescent signal for attachment to the arm | General | 10 | Expired |
| US4793830A | Process for producing high quality gas for instrumentation application using gas separation membranes | Performing Operations; Transporting | 9 | Expired |
| US5779396A | Processes for conditioning soil with anionic water-soluble polymers | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5725779A | Anionic water-soluble polymer precipitation in salt solution | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5539604A | Transient voltage suppressor apparatus | Electricity | 6 | Expired |
| US5389350A | Gas separation using adsorbent activated carbonized polyarylamides | Textiles; Paper | 6 | Expired |
| US8962836B2 | Formation of N-protected bis-3,6-(4-aminobutyl)-2,5-diketopiperazine through a cyclic alpha-N-protected amino ester | Chemistry; Metallurgy | 6 | Active |
| US5885032A | Cationic water-soluble polymer precipitation in salt solutions | Emerging Cross-Sectional Technologies | 6 | Expired |
| US6330828A | Method and apparatus for subjecting a device to rotational vibration | Physics | 5 | Expired |
| US9187433B2 | Formation of N-protected 3,6-bis-(4-aminobutyl) -2, 5-diketopiperazine through a cyclic α-N-protected active amino ester intermediate | Chemistry; Metallurgy | 5 | Active |
| US9944609B2 | Formation of N-protected bis-3,6-(4-aminobutyl)-2, 5-diketopiperazine through a cyclic alpha-N-protected amino ester | Chemistry; Metallurgy | 4 | Active |
| US7129274B1 | Phenoxy carboxylic acid compounds and compositions for delivering active agents | Chemistry; Metallurgy | 4 | Expired |
| US6040376A | Anionic water-soluble polymer precipitation in salt solution | Chemistry; Metallurgy | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.