Keith Douglas Perring
38Patents
11h-index
36Co-inventors
75Inventor score
Filing activity: Aug 2, 1990 → Mar 16, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5185155A | Encapsulating method and products containing encapsulated material | Human Necessities | 79 | Expired |
| US5500223A | Encapsulating method and products containing encapsulated material | Human Necessities | 74 | Expired |
| US5876755A | Humidity resistant composition | Human Necessities | 46 | Expired |
| US5554588A | Perfume compositions | Human Necessities | 41 | Expired |
| US5190915A | Perfumed structured emulsion in personal products | Chemistry; Metallurgy | 26 | Expired |
| US5288423A | Process for preparing perfumed detergent products | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5840668A | Perfumed laundry detergent powders | Chemistry; Metallurgy | 16 | Expired |
| US5156766A | Stabilized emulsion systems | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5078904A | Fabric softening compositions containing micro organism encapsulated perfume | Chemistry; Metallurgy | 13 | Expired |
| US5676163A | Anti-smoke perfumes and compositions | Chemistry; Metallurgy | 11 | Expired |
| US5482635A | Fabric conditioner with deodorant perfume composition | Human Necessities | 11 | Expired |
| US6172037A | Perfume fixatives comprising polyvinylpyrrolidone and hydroxypropyl cellulose | Human Necessities | 11 | Expired |
| US6465420B1 | Perfume compositions | Chemistry; Metallurgy | 8 | Expired |
| US6063754A | Fabric conditioning composition | Chemistry; Metallurgy | 8 | Expired |
| US5246918A | Process for preparing perfumed personal products | Chemistry; Metallurgy | 8 | Expired |
| US5204023A | Malodors reduction | Chemistry; Metallurgy | 6 | Expired |
| US5334581A | Process for preparing perfumed personal products | Chemistry; Metallurgy | 6 | Expired |
| US6140295A | Perfumed laundry detergents containing lipase | Chemistry; Metallurgy | 5 | Expired |
| US6475473B1 | Perfume compositions | Chemistry; Metallurgy | 5 | Expired |
| US6568604B1 | Dispensing means | Human Necessities | 4 | Expired |
| US6713410B1 | Method for textile treatment for spandex containing fabrics | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7781392B2 | Perfume compositions | Chemistry; Metallurgy | 3 | Expired |
| US5789010A | Malodors reduction | Chemistry; Metallurgy | 3 | Expired |
| US7713922B2 | Perfume compositions | Chemistry; Metallurgy | 2 | Active |
| US5891729A | Method for substrate classification | Emerging Cross-Sectional Technologies | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.