Wavin B.V.
144Patents
10Active
144Granted
43Portfolio score
Filing activity: Apr 20, 1973 → Nov 20, 2020 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4754781A | Plastic pipe comprising an outer corrugated pipe and a smooth inner wall | Mechanical Engineering; Lighting; Heating | 108 | Expired |
| US4316419A | Plastics pallet | Emerging Cross-Sectional Technologies | 76 | Expired |
| US4578329A | Method of marking an article having at least a polyolefin surface and an article having a polyolefin surface provided with a black mark of decomposed polyolefin | Emerging Cross-Sectional Technologies | 55 | Expired |
| US4743123A | Plastic bag and closed plastic bag with laser-formed venting perforations | Performing Operations; Transporting | 40 | Expired |
| US5340160A | Thermoplastic saddle in two parts for repairing or renovating a pipe line with branch pipe and repaired or renovated pipe with a saddle | Emerging Cross-Sectional Technologies | 37 | Expired |
| US4572523A | Sealing joint and retaining ring for pipe grooved bell and straight spigot joint | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US4441745A | Coupling pipe part for interconnecting corrugated pipe parts | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4491959A | Plastic bag with gusset folds and perforations | Performing Operations; Transporting | 32 | Expired |
| US4555884A | Plastic glazing profile designed for glazing window-frames | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4321228A | Method of and apparatus for manufacturing a plastic pipe comprising longitudinally extending hollow channels in its wall | Performing Operations; Transporting | 31 | Expired |
| US3943273A | Electrically conducting plastic pipe system | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4441743A | Adhesively joined pipe connection | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5286437A | Method and installation for the production of plastic products with the aid of a hot mixture of PVC powder and additives, and a hot mixer suitable for use with this method | Chemistry; Metallurgy | 27 | Expired |
| US4369159A | Plastic socket pipe part and method of manufacturing same | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4566704A | Sealing body for a pipe connection | Performing Operations; Transporting | 26 | Expired |
| US4214612A | Tube of non woven material for reversed osmosis | Performing Operations; Transporting | 26 | Expired |
| US4674650A | Container and cover fastening means | Performing Operations; Transporting | 26 | Expired |
| US4390383A | Method of making plastic pipes having walls with lengthwise extending channels | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4662655A | Pipe connection of fibre reinforced plastic pipe parts | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4561107A | Web of plastic bags | Emerging Cross-Sectional Technologies | 23 | Expired |
| US5108669A | Process and apparatus perforating tubular plastic foil with a laser beam | Performing Operations; Transporting | 22 | Expired |
| US4440195A | Plastic tube with longitudinal channels in the wall | Performing Operations; Transporting | 21 | Expired |
| US4452303A | Device and a method for recovering heat from the soil | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4230157A | Pipe having an end portion, the inner wall of which is provided with a circumferential groove, in which a sealing means is mounted and a pipe joint consisting of this pipe and a spigot end of a second pipe inserted therein | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4813457A | Flanged pipe part made of fiber-reinforced thermosetting synthetic resin with protective layer preventing crack formation in an angular intersection | Performing Operations; Transporting | 21 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.