Inventor · disambiguated record
Randall H. Helland
Also filed as: HELLAND RANDALL H
12 granted patents·2 pending applications·296 citations·filing 1986–2006
92Inventor score
Top patents by PatentIndex Score
14 records- 0198US5258274AThermal dye bleach construction sensitive to ultraviolet radiationMINNESOTA MINING & MFG·Filed 1992·Granted Nov 2, 1993·85 cites·17 claims
- 0295US5380635ADihydroperimidine squarylium dyes as antihalation and acutance materials for photographic and photothermographic articlesMINNESOTA MINING & MFG·Filed 1994·Granted Jan 10, 1995·59 cites·21 claims
- 0395US5135842AThermal dye bleach constructionMINNESOTA MINING & MFG·Filed 1990·Granted Aug 4, 1992·40 cites·14 claims
- 0493US5314795AThermal-dye-bleach construction comprising a polymethine dye and a thermal carbanion-generating agentMINNESOTA MINING & MFG·Filed 1992·Granted May 24, 1994·34 cites·19 claims
- 0585US5395747AStabilized thermal-dye-bleach constructionsMINNESOTA MINING & MFG·Filed 1993·Granted Mar 7, 1995·14 cites·28 claims
- 0679US7169831B2Pavement marking composition comprising ceramic fibers3M INNOVATIVE PROPERTIES CO·Filed 2002·Granted Jan 30, 2007·13 cites·26 claims
- 0779US5324627ATetra-alkylammonium phenylsulfonylacetate thermal-dye-bleach agentsMINNESOTA MINING & MFG·Filed 1992·Granted Jun 28, 1994·10 cites·17 claims
- 0870US5266452APhotographic element containing a thermal dye bleach systemMINNESOTA MINING & MFG·Filed 1992·Granted Nov 30, 1993·16 cites·12 claims
- 0967US4752559APrimer/antihalation coating for photothermographic constructionsHELLAND RANDALL H·Filed 1987·Granted Jun 21, 1988·12 cites·17 claims
- 1057US2006111468A1Method of marking pavement with sheet comprising ceramic fibers3M INNOVATIVE PROPERTIES CO·Filed 2006·Application pending·0 cites
- 1156US6329128B1Stable antihalation materials for photographic and photothermographic elementsEASTMAN KODAK CO·Filed 1995·Granted Dec 11, 2001·6 cites·32 claims
- 1252US5384237AQuaternary-ammonium phenylsulfonylacetate thermal-dye-bleach agentsMINNESOTA MINING & MFG·Filed 1994·Granted Jan 24, 1995·3 cites·6 claims
- 1346US2003069358A1Pavement markings comprising synthetic polymeric fibers3M INNOVATIVE PROPERTIES CO·Filed 2002·Application pending·0 cites
- 1433US4681830AFluorinated carbon-containing developer compositionMINNESOTA MINING & MFG·Filed 1986·Granted Jul 21, 1987·4 cites·15 claims
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