Inventor
Wing Sum Vincent Kwan
Inventor
Chicago, IL, US
Overview
Patents· 28 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C09Dprimary
C09DCoating compositions, e.g. paints, varnishes or lacquers28%
B41MPrinting, duplicating, marking, or copying processes14%
B43KImplements for writing or drawing14%
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds11%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties11%
C09BOrganic dyes or closely-related compounds for producing dyes, e.g. pigments5%
G11BInformation storage based on relative movement between record carrier and transducer5%
H01FMagnets5%
G01JMeasurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light3%
A46BBrushes2%
PatentTitleYear
11,110,738Writing instruments and associated methods202110,245,877Ink delivery system20199,809,722'Transitorially erasable ink compositions and writing instruments containing same'20179,163,153'Metallic ink composition and writing instrument containing same'20158,889,590'Irreversible thermochromic ink compositions'20148,865,621'Irreversible color changing ink compositions'20148,846,797'Metallic ink composition and writing instrument containing same'20148,709,973'Irreversible thermochromic ink compositions'20148,664,156'Irreversible thermochromic ink compositions'20148,652,996'Irreversible thermochromic pigment capsules'20147,981,210'Capillary-action, glitter markers and ink compositions for same'20117,488,380'Highlighting marking compositions, highlighting kits, and highlighted complexes'20097,481,593'Combination hydrophobic/hydrophilic filters/reservoirs for controlling fluid flow'20097,455,724'Decoder system'20087,442,725'Color changing correction fluid'20087,364,614'Capillary-action, glitter markers and ink compositions for same'20087,163,575'Water-based, resin-free and solvent-free eradicable ball-pen inks'20076,905,539'Black eradicable ink, methods of eradication of the same, eradicable ink kit, and eradicated ink complex'20056,478,861'Laser markable coating'20026,261,348'Laser markable coating'20016,235,829'Modification of chargeable pigment particles'20016,210,472'Transparent coating for laser marking'20016,179,907'Black iron oxide with improved heat stability and method of preparing same'20016,024,789'Method of preparing iron-containing pigment with enhanced dispersibility in both polar and nonpolar solvents'20005,922,121'Hydrophobic treatment of pigments'19995,865,885'Hydrophilic treatment of pigments'19995,855,661'Pigment dispersion'19995,849,074'Method for preparing magnetic ink and dry pigment particles used therefor'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998–2000Patents assigned to VIDEOJET SYSTEMS INT (5)· patent assignee history
1998–2002Based in Deerfield, IL, US· patent location history
2001Patents assigned to MARCONI DATA SYSTEMS INC (4)· patent assignee history
2005–2021Patents assigned to SANFORD LP (18)· patent assignee history
2005–2021Based in Chicago, IL, US· patent location history
2014–2015Patents assigned to KWAN WING SUM VINCENT (5)· patent assignee history
2014Patents assigned to KWAN WING SUM V (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| SANFORD LP | 18 | 2005–2021 |
| KWAN WING SUM VINCENTself | 5 | 2014–2015 |
| VIDEOJET SYSTEMS INT | 5 | 1998–2000 |
| MARCONI DATA SYSTEMS INC | 4 | 2001 |
| KWAN WING SUM Vself | 1 | 2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Chicago, Illinois, US | 18 | 2005–2021 |
| Deerfield, Illinois, US | 10 | 1998–2002 |