Inventor

William L. Albrecht

Inventor

Cincinnati, OH, US

Overview

1976–1989

Patent span

Chemistry

Primary field (CPC C)

Patents· 15 as inventor

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

C07Dprimary

C07DHeterocyclic compounds70%

C07CAcyclic or carbocyclic compounds20%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations5%

C01BNon-metallic elements5%

PatentTitleYear

4,797,498'Flavonoxypropanolamines and esters of flavonoxypropanolamines as antiarrhythmic agents'1989 4,411,905'Antisecretory 1,2,4-triazole-3-thiols'1983 4,230,715'1,2,4-Triazole-3-thiols as antisecretory agents'1980 4,146,624'Method of treating viruses with bis-basic ketones of dibenzofuran'1979 4,064,347'Bis-basic ketones of fluorene and fluorenone'1977 3,983,124'Fluorene compounds'1976 3,962,451'Carbazole derivatives'1976 3,954,984'Triazolocycloalkylthiadiazine derivatives'1976 3,954,983'Triazolobenzocycloalkylthiadiazine derivatives'1976 3,954,981'Triazolocycloalkylhydrothiadiazine derivatives'1976 3,952,014'Bis-basic esters and amides of dibenzothiophene'1976 3,947,376'Silica sols containing large particle size silica'1976 3,946,021'Bis-basic ketones of carbazole'1976 3,932,424'Bis-basic ethers of carbazole'1976 3,932,456'Bis-basic esters and amides of carbazole'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1983Patents assigned to RICHARDSON MERRELL INC (13)· patent assignee history

1976Patents assigned to NALCO CHEMICAL CO (1)· patent assignee history

1976–1983Based in Cincinnati, OH, US· patent location history

1976Based in Naperville, IL, US· patent location history

1989Patents assigned to PENNWALT CORP (1)· patent assignee history

1989Based in Rochester, NY, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
RICHARDSON MERRELL INC	13	1976–1983
NALCO CHEMICAL CO	1	1976
PENNWALT CORP	1	1989

Locations

Location	Patents	Span
Cincinnati, OH, US	13	1976–1983
Rochester, New York, US	1	1989
Naperville, Illinois, US	1	1976