Poly-Tec Products, Inc.
17Patents
1Active
17Granted
33Portfolio score
Filing activity: Feb 15, 1990 → Oct 20, 2005 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5081802A | Method and apparatus for lining manhole assemblies and the like | Fixed Constructions | 35 | Expired |
| US5299884A | Water lock method and apparatus | Fixed Constructions | 31 | Expired |
| US5248154A | Bidirectional gasket | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US6126173A | Extruded gasket for cored manholes | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US7108101B1 | Manhole insert for manufacture of a cast member and to provide a step insert having increased structural and holding strength | Performing Operations; Transporting | 16 | Expired |
| US6651949B1 | Apparatus for casting a gasket and associated positioning member into an opening and a cast member for receiving a conduit | Performing Operations; Transporting | 13 | Expired |
| US6406025B1 | Gasket and method for fabrication and use with corrugated pipe | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US7677829B2 | Inserts and reusable holder therefor | Emerging Cross-Sectional Technologies | 9 | Active |
| US6568691B1 | Method and apparatus for forming cast members having embedded boot type gaskets | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5997006A | Bidirectional gasket having water energizing pockets | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US6607219B2 | Expansion type clamping band characterized by simplified design and ease of use | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5884438A | Lift insert assembly and fabrication assembly method therefore | Performing Operations; Transporting | 7 | Expired |
| US5217237A | Bidirectional gasket having water energizing pockets | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6921085B2 | Packaging design incorporating gasket clamping assemblies and installation instructions | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| USRE34787E | Bidirectional gasket having water energizing pockets | General | 4 | Expired |
| US6196517A | Placement ring assembly having cushioned knockout assembly | Performing Operations; Transporting | 3 | Expired |
| US5860254A | Lift insert assembly and fabrication assembly method | Fixed Constructions | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.