Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Constance MacDonald — 3 Patents

MIMillipore: 3 patents #80 of 440Top 20%
Stoneham, MA: #108 of 278 inventorsTop 40%
Massachusetts: #33,867 of 88,656 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Constance MacDonald has been granted 3 US patents while listed as an inventor at Millipore. The first was granted in 2002 and the most recent in November 2003. Constance MacDonald ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Constance MacDonald in Stoneham, MA, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6645722 Method for sequencing reaction cleanup by constant differential pressure ultrafiltration Jack T. LEONARD, Joseph Gabriels 2003-11-11 $12,117,000
6642005 Method for sequencing reaction cleanup by constant pressure differential ultrafiltration Jack T. LEONARD, Joseph Gabriels 2003-11-04 $6,241,000
6498240 Method for sequencing reaction cleanup by constant pressure diffential ultrafiltration Jack T. LEONARD, Joseph Gabriels 2002-12-24 $13,296,000