Helmut Lask
19Patents
12h-index
10Co-inventors
71Inventor score
Filing activity: Nov 11, 1974 → Oct 13, 1988
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4187342A | Bonded fiber web, which is capable of absorbing water vapor comprising a swellable cellulose ether in fiber form | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4250306A | Process and equipment for preparing swellable cross-linked carboxyalkylcelluloses from natural cellulose or cellulose hydrate and use thereof | Chemistry; Metallurgy | 32 | Expired |
| US3936441A | Process for the production of water adsorbing but water-insoluble cellulose ethers | Chemistry; Metallurgy | 31 | Expired |
| US4144886A | Absorbent laminate | Emerging Cross-Sectional Technologies | 24 | Expired |
| US3965091A | Process for the production of water-adsorbing but water-insoluble cellulose ethers | Chemistry; Metallurgy | 24 | Expired |
| US3990851A | Process and device for measuring antigen-antibody reactions | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4200558A | Method of producing hydrophilic articles of water-insoluble polymers | Chemistry; Metallurgy | 20 | Expired |
| US4136218A | Process for the improvement of the water-absorbing capacity and the absorptivity of textile materials | Textiles; Paper | 19 | Expired |
| US4096289A | Electrostatic deposition of swellable, modified cellulose ether on water wet hydrophilic substrate | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4924084A | Device for determining surface moisture | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4066828A | Process for the production of water-adsorbing cellulose ethers | Chemistry; Metallurgy | 14 | Expired |
| US4096312A | Deposition of swellable, modified cellulose ether on water wet hydrophilic substrate | Emerging Cross-Sectional Technologies | 13 | Expired |
| US4186238A | Hydrophilic articles of water-insoluble polymers | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4248595A | Process for preparing swellable cross-linked carboxyalkylcelluloses, in the form of fibers, from cellulose hydrate and use thereof | Chemistry; Metallurgy | 12 | Expired |
| US4068067A | Process for the production of water-adsorbing cellulose ethers | Chemistry; Metallurgy | 10 | Expired |
| US4068068A | Process for the manufacture of water-absorbing cellulose ethers | Chemistry; Metallurgy | 8 | Expired |
| US4015611A | Cigarette filter | Human Necessities | 4 | Expired |
| US4194024A | Method of making hydrophilic articles of water-insoluble polymers | Chemistry; Metallurgy | 4 | Expired |
| US4171705A | Cigarette filter | Human Necessities | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.