Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › 3-Substituted- 7-dialkylamino-spiro(2H-1-benzopyran-2,3'-(3H)-naphtha(2,1-b)pyrans)

3-Substituted- 7-dialkylamino-spiro(2H-1-benzopyran-2,3'-(3H)-naphtha(2,1-b)pyrans)

US Patent 4384094 · Granted May 17, 1983

Estimated economic value: $7,275,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Highly insoluble azole embossing inhibitor and the use thereof1995
Alkoxysilane and alkoxysilane terminated polyamic or polyimide lacquer compositi1991
Optical storage system having expanded capacity1988
Bicyclic acrylic monomers1987
Novel polyacrylic esters bearing pendant macrocyclic ethers and electrically con1987
Novel polyacrylic esters bearing pendant macrocyclic ethers and electrically con1987
Novel polyacrylic esters bearing pendant macrocyclic ethers and electrically con1986
Polyurethane polymers comprising macrocyclic crown ethers in the polymer backbon1984
3-Substituted-7-alkoxy-spiro(2H -1-benzopyran-2,3'-(3H)-naphtho(2,1-B)pyrans)1983
3-Substituted-7-alkoxy-spiro(2H -1-benzopyran-2,3'-(3H)-naphtho(2,1-B)pyrans)1983
3-Substituted-7-alkoxy-spiro(2H -1-benzopyran-2,3'-(3H)-naphtho(2,1-B)pyrans)1983
3-Substituted-7-alkoxy-2,2'-Spirobi[2H-1-benzopyrans]1982