AMERICAN Cast Iron Pipe Company
32Patents
5Active
32Granted
41Portfolio score
Filing activity: Nov 29, 1974 → Jul 18, 2019
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5067751A | Gasket for field adaptable push-on restrained joint and joint thus produced | Emerging Cross-Sectional Technologies | 78 | Expired |
| US5197768A | Restrained joint having elastomer-backed locking segments | Mechanical Engineering; Lighting; Heating | 51 | Expired |
| US4643466A | Pipe joint assembly with snap ring and associated method | Mechanical Engineering; Lighting; Heating | 49 | Expired |
| US5993570A | Linepipe and structural steel produced by high speed continuous casting | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5480196A | Ductile iron pipe joint employing a coupling and coupling therefor | Emerging Cross-Sectional Technologies | 36 | Expired |
| US4685708A | Axially restrained pipe joint with improved locking ring structure | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4456288A | Snap ring and restrained pipe joint using said snap-ring | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4402531A | Fire hydrant nozzle assembly | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5738140A | Adjustable height extension stem and valve box assembly | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5520419A | Apparatus for assembling bell and spigot pipe joints | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4524505A | Method of assembling a pipe joint | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4428604A | Restrained pipe joint and associated snap-ring | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US4254165A | Method of forming a filled polymer coating on an internal cylindrical surface and article produced thereby | Performing Operations; Transporting | 14 | Expired |
| US5277242A | Pipe casting machine having improved pipe mold stabling rings | Performing Operations; Transporting | 12 | Expired |
| US4968002A | Boltless bonnet assembly for gate valve | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4095643A | Agent feeder for pipe casting apparatus | Chemistry; Metallurgy | 9 | Expired |
| US4913089A | Concrete injector pump and process for lining pipe | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5426842A | Method of assembling bell and spigot pipe joints | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4474134A | Method and apparatus for coating the interior surface of metal pipes | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4597995A | High speed pipe lining method and apparatus | Performing Operations; Transporting | 7 | Expired |
| US4987013A | Process for lining pipe | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| USD415052S | Self-centering alignment ring | General | 4 | Expired |
| US4830266A | Method of producing weld metal tubing empoying a reusable mandrel | Performing Operations; Transporting | 4 | Expired |
| US4455329A | Method for coating the interior surface of metal pipes | Performing Operations; Transporting | 3 | Expired |
| US6490900B1 | Pipe gauging and rounding apparatus and method | Performing Operations; Transporting | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.