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Inventor

John D. Weston

Inventor
Glens Falls, NY, US

Overview

9→
Patents
1991–2012
Patent span
Textiles
Primary field (CPC D)

Patents· 9 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

D21Cprimary
D21CProduction of cellulose by removing non-cellulose substances from cellulose-containing materials42%
D21DTreatment of the materials before passing to the paper-making machine21%
B01DSeparation11%
D21BFibrous raw materials or their mechanical treatment5%
D21HPulp compositions5%
F15BSystems acting by means of fluids in general5%
F16KValves5%
Y10TTechnical subjects covered by former us classification5%
PatentTitleYear
8,157,956'Cylindrical bearing for pressure diffuser and associated method'20126,379,504'Apparatus for pulping sawdust'20026,325,888'Method for pulping sawdust'20015,567,279'Variable stage pressure diffuser'19965,567,262'Two stage pressure diffuser'19965,183,536'Atmospheric diffuser improved lower screens backflushing'19935,169,498'Atmospheric pre-steaming chip bin vacuum and pressure relief device'19925,116,476'Atmospheric diffuser improved lower screens backflushing'19925,021,125'Pistonless accumulator'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1993Patents assigned to KAMYR INC (4)· patent assignee history
1991–1996Based in Glens Falls, NY, US· patent location history
1992Based in Glen Falls, NY, US· patent location history
1996Patents assigned to AHLSTROM MACHINERY INC (2)· patent assignee history
2001Patents assigned to ANDRITZ AHLSTROM INC (1)· patent assignee history
2001Based in Quensbury, NY, US· patent location history
2002–2012Patents assigned to ANDRITZ INC (2)· patent assignee history
2002–2012Based in Queensbury, NY, US· patent location history
2012Patents assigned to BECHARD GRANT (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KAMYR INC41991–1993
AHLSTROM MACHINERY INC21996
ANDRITZ INC22002–2012
ANDRITZ AHLSTROM INC12001
BECHARD GRANT12012
Locations
LocationPatentsSpan
Glens Falls, New York, US51991–1996
Queensbury, New York, US22002–2012
Quensbury, New York, US12001
Glen Falls, New York, US11992