Stackpole & Associates, Inc.
37Patents
3Active
37Granted
39Portfolio score
Filing activity: Jul 14, 1980 → Jul 17, 2020 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4544431A | Roll fed labelling machine | Emerging Cross-Sectional Technologies | 52 | Expired |
| US5476632A | Powder metal alloy process | Chemistry; Metallurgy | 39 | Expired |
| US4384223A | Radio-frequency interference suppressing system for permanent magnet field motor | Electricity | 27 | Expired |
| US5540883A | Method of producing bearings | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5698149A | Phased split die | Emerging Cross-Sectional Technologies | 25 | Expired |
| US5516483A | Hi-density sintered alloy | Performing Operations; Transporting | 25 | Expired |
| US5422322A | Dense, self-sintered silicon carbide/carbon-graphite composite and process for producing same | Chemistry; Metallurgy | 22 | Expired |
| US5722815A | Three stage self regulating gerotor pump | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5729822A | Gears | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6165400A | Compacted-powder opposed twin-helical gears and method | Performing Operations; Transporting | 19 | Expired |
| US4758300A | High speed labelling machine | Emerging Cross-Sectional Technologies | 18 | Expired |
| US5754937A | Hi-density forming process | Chemistry; Metallurgy | 17 | Expired |
| US4323804A | Permanent magnet field motor with radio frequency interference suppressing capacitor | Electricity | 15 | Expired |
| US6318986A | Undercut split die | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6110419A | Point contact densification | Performing Operations; Transporting | 12 | Expired |
| US5641922A | Hi-density sintered alloy and spheroidization method for pre-alloyed powders | Performing Operations; Transporting | 12 | Expired |
| US4294438A | Replaceable liner for a crucible | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6019937A | Press and sinter process for high density components | Performing Operations; Transporting | 11 | Expired |
| US6907971B2 | One-way clutch | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6099772A | Undercut split die | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6440357B1 | Compacted-powder opposed twin-helical gears and method | Performing Operations; Transporting | 10 | Expired |
| US5997805A | High carbon, high density forming | Performing Operations; Transporting | 9 | Expired |
| US6365094B1 | Lubricated die | Performing Operations; Transporting | 9 | Expired |
| US6143240A | High density forming process with powder blends | Performing Operations; Transporting | 8 | Expired |
| US5656787A | Hi-density sintered alloy | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.