Contech Construction Products Inc.
17Patents
3Active
17Granted
36Portfolio score
Filing activity: Aug 6, 1985 → May 29, 2009 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5124109A | Method for producing a double wall pipe | Emerging Cross-Sectional Technologies | 49 | Expired |
| US4702502A | Gasket for making joints in corrugated plastic pipe | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5720577A | Box culvert | Fixed Constructions | 36 | Expired |
| US5380121A | Slotted drain | Emerging Cross-Sectional Technologies | 32 | Expired |
| US4846660A | Apparatus for producing double wall pipe | Performing Operations; Transporting | 24 | Expired |
| US5564857A | Slutted drain | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5707088A | Joint for coupling plastic corrugated pipes | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5842727A | Coupling for spiral corrugated pipe | Emerging Cross-Sectional Technologies | 14 | Expired |
| US4865357A | Metal pipe coupling to accommodate a desired angle of connection between drainage pipe sections | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5383693A | Gaskets used in joining corrugated pipe | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4974440A | Self propelled internal pipe arching apparatus | Performing Operations; Transporting | 8 | Expired |
| US5862581A | Method for making a joint for a corrugated pipe segment | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4914939A | Self propelled internal pipe arching apparatus | Performing Operations; Transporting | 7 | Expired |
| US6994381B1 | Stab joint coupling | Emerging Cross-Sectional Technologies | 4 | Expired |
| US8109540B2 | Pipe joint and related method | Emerging Cross-Sectional Technologies | 3 | Active |
| US7404308B2 | Apparatus for producing helically corrugated metal pipe and related method | Performing Operations; Transporting | 1 | Active |
| US7574886B2 | Apparatus for producing helically corrugated metal pipe and related method | Performing Operations; Transporting | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.