Gelman Sciences
🏢 View company profile →48Patents
0Active
48Granted
39Portfolio score
Filing activity: Jun 30, 1978 → Mar 2, 1995
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5554025A | Disposable point of use air and water filter for dental syringes | Human Necessities | 159 | Expired |
| US5749726A | Disposable point of use filtration element for purifying air and water supplies to dental handpieces | Human Necessities | 135 | Expired |
| US4459139A | Disposable filter device and liquid aspirating system incorporating same | Human Necessities | 130 | Expired |
| US5308483A | Microporous filtration funnel assembly | Performing Operations; Transporting | 127 | Expired |
| US5601711A | Selective separation filter device | Performing Operations; Transporting | 90 | Expired |
| US5209849A | Hydrophilic microporous polyolefin membrane | Chemistry; Metallurgy | 75 | Expired |
| US4906260A | Self-priming intravenous filter | Human Necessities | 74 | Expired |
| US5151189A | Cationic charge modified microporous membrane | Performing Operations; Transporting | 69 | Expired |
| US5156780A | process for treating a porous substrate to achieve improved water and oil repellency | Textiles; Paper | 66 | Expired |
| US4468321A | Filter device with magnetic filter clamp | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4676771A | Arterial blood filter | Human Necessities | 58 | Expired |
| US4900449A | Filtration membranes and method of making the same | Performing Operations; Transporting | 56 | Expired |
| US4374232A | Graft copolymer membrane and processes of manufacturing and using the same | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5269931A | Cationic charge modified microporous membranes | Performing Operations; Transporting | 49 | Expired |
| US5114585A | Charged porous filter | Performing Operations; Transporting | 43 | Expired |
| US5126189A | Hydrophobic microporous membrane | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5472606A | Self-supporting, pleated, spirally wound filter | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5403482A | Self-supporting, pleated, spirally wound filter and the corresponding process of making | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5108607A | Filtration membranes and method of making the same | Performing Operations; Transporting | 38 | Expired |
| US4369112A | Filter device | Performing Operations; Transporting | 34 | Expired |
| US4319996A | Filter with initially flat membrane and curved membrane support | Human Necessities | 33 | Expired |
| US5141639A | Vacuum filter assembly | Performing Operations; Transporting | 31 | Expired |
| US5021160A | Strongly acidic microporous membranes for cation exchange | Chemistry; Metallurgy | 30 | Expired |
| US4466931A | Method for manufacturing microporous membrane | Chemistry; Metallurgy | 30 | Expired |
| US4964990A | Filtration membranes and method of making the same | Performing Operations; Transporting | 28 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.