A.W. CHESTERTON COMPANY
91Patents
25Active
91Granted
53Portfolio score
Filing activity: Dec 27, 1976 → Aug 5, 2024 · 4 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4576384A | Split mechanical face seal | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US6210103A | Rotary seal and/or bearing | Mechanical Engineering; Lighting; Heating | 52 | Expired |
| US5225262A | Braided high-temperature packing comprising a core of folded flexible graphite sheet | Emerging Cross-Sectional Technologies | 46 | Expired |
| US4439096A | Impeller adjuster for centrifugal pump | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US5571268A | Universal split mechanical seal | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US5827042A | Seal/bearing assembly | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US4625977A | Convertible, stand-by rotary seal assembly | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5263404A | Anti-rotation wiper ring | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US5398944A | Sealing system for reciprocating rod | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5456286A | Shaft seal coolant flow control | Emerging Cross-Sectional Technologies | 28 | Expired |
| US4572517A | Labyrinth ring seals with housing mounting means | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US5344291A | Motor pump power end interconnect | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US6059293A | Split mechanical face seal with seal face fluid introducing structure | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US5203575A | Balanced mechanical seal assembly and flow ring therefor | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5333882A | Balanced mechanical seal assembly and flow ring therefor | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5544897A | Cartridge seal having a high contact pressure seal and means for intersleeve adjustment including quench fluid delivery | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5725220A | Securing and centering devices for a split mechanical seal | Mechanical Engineering; Lighting; Heating | 18 | Expired |
| US6557856B1 | Split mechanical face seal | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US4973065A | Seal assembly | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US7708283B2 | Mechanical seal assembly | Emerging Cross-Sectional Technologies | 17 | Active |
| US6076830A | Dual non-contacting mechanical face seal having concentric seal faces | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4691927A | Temperature-compensating mechanical face seal | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4327923A | Packing | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4863177A | Split labyrinth seal | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US4157833A | Sealing ring with diameter indicia | Mechanical Engineering; Lighting; Heating | 16 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.