Ahlstrom Machinery, Inc.
53Patents
1Active
53Granted
38Portfolio score
Filing activity: Apr 16, 1991 → Oct 20, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5813758A | Concentric ring fluidizing mixer | Performing Operations; Transporting | 39 | Expired |
| US6010594A | Method of bleaching pulp with chlorine-free chemicals wherein a complexing agent is added immediately after an ozone bleach stage | Textiles; Paper | 32 | Expired |
| US5622598A | Chip pumping to a digester | Textiles; Paper | 30 | Expired |
| US5635025A | Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chute | Textiles; Paper | 28 | Expired |
| US5700355A | Chip feeding for a continuous digester | Textiles; Paper | 25 | Expired |
| US5617975A | Chip feed system | Textiles; Paper | 21 | Expired |
| US5536366A | Digester system for implementing low dissolved solids profiling | Textiles; Paper | 21 | Expired |
| US5529190A | Gas sparged hydrocyclone with foam separating vessel | Emerging Cross-Sectional Technologies | 21 | Expired |
| US5968314A | Chip feeding for a digester | Textiles; Paper | 20 | Expired |
| US5628873A | Chip bin assembly including a hollow transition with one dimensional convergence and side relief | Textiles; Paper | 20 | Expired |
| US5795438A | Method and apparatus for feeding multiple digesters | Textiles; Paper | 19 | Expired |
| US5662775A | Continuous digester with dissolved solids handling | Textiles; Paper | 19 | Expired |
| US5766418A | Handling fibrous material used to produce cellulose pulp | Textiles; Paper | 18 | Expired |
| US5736006A | Method and apparatus for pulping with controlled heating to improve delignification and pulp strength | Textiles; Paper | 17 | Expired |
| US5620562A | Dissolved solids control in pulp production | Textiles; Paper | 16 | Expired |
| US5882477A | Continuous digester with a low temperature gas-phase | Textiles; Paper | 16 | Expired |
| US5830314A | Cleaning condensates from multi-effect evaporator of cellulose pulp waste liquors | Textiles; Paper | 16 | Expired |
| US5849151A | Continuous digester having means for implementing low dissolved solids profiling | Textiles; Paper | 14 | Expired |
| US6106668A | Method for feeding comminuted fibrous material | Textiles; Paper | 13 | Expired |
| US5635026A | Cooking cellulose material with high alkali concentrations and/or high pH | Textiles; Paper | 12 | Expired |
| US5779856A | Cooking cellulose material using high alkali concentrations and/or high pH near the end of the cook | Textiles; Paper | 12 | Expired |
| US6039841A | Screen having inclined slots for use in a continuous digester | Textiles; Paper | 11 | Expired |
| US6024227A | Tramp material removal from pulp feed systems | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5603803A | Method and apparatus for recovering heat in a spent liquor recovery boiler | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5985096A | Vertical pulping digester having substantially constant diameter | Textiles; Paper | 11 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.