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Inventor

Masahisa Oka

Inventor
Yokohama, JP

Overview

26→
Patents
1978–2000
Patent span
Chemistry
Primary field (CPC C)

Patents· 26 as inventor

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

C07Kprimary
C07KPeptides19%
C07DHeterocyclic compounds16%
C12NMicroorganisms or enzymes16%
C12RIndexing scheme associated with subclasses c12c - c12q, relating to microorganisms16%
A61KPreparations for medical, dental or toiletry purposes8%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations5%
C07CAcyclic or carbocyclic compounds5%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests5%
C08GMacromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds3%
C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture3%
PatentTitleYear
6,013,826'Method formation of a carbon-carbon bond'20005,665,394'Matrix for sustained-release preparation'19975,594,091'Matrix for sustained-release preparation'19975,266,600'BU-4641V, an antibacterial, antiviral and antitumor antibiotic'19935,256,548'Antiviral antibiotic BU-4344V'19935,140,101'Antiviral antibiotic BU-4344V'19925,096,884'Glidobactin PF-1 peptide antibiotics'19925,079,148'Peptide antibiotics'19925,025,023'Peptide antibiotics'19914,916,063'BU-2867T peptide antibiotics'19904,898,940'Peptide antibiotics'19904,833,076'Peptide antibiotics'19894,789,731'Semi-synthetic peptide antibiotics'19884,777,160'BU-2867T peptide antibiotics'19884,751,295'Cephalosporin derivatives'19884,742,047'Semi-synthetic peptide antibiotics'19884,692,510'Peptide antibiotics'19874,507,487'Chemical compounds'19854,474,954'Intermediates for cephalosporin derivatives'19844,394,503'Cephalosporin derivatives'19834,288,590'7 -[D.alpha.-(4-Hydroxy-1,5-naphthyridine-3-carboxamido)-.alpha.-arylacetam ido]-3-(N,N-dimethyl-aminomethylpyridinium) methyl-3-cephem-4-carboxylates'19814,198,504'[3-(Pyridinium)-7-(naphthyiridinyl carbonylamino)acetamido]cephalosporanic acid derivatives'19804,198,506'2-Carboxyalkyl-2,3-dihydro-6-mercapto-s-triazolo[4,3-b]-pyridazin-3-ones'19804,151,352'7-Amino-3- (2-carboxyalkyl-2,3-dihydro-s-triazolo[4,3-b]pyridazin-3-on-6-ylthiomethy l)-3-cephem-4-carboxylic acids'19794,138,554'7-[D-.alpha.-(4-Hydroxy-1,5-naphthyridine-3-carboxamido)-.alpha.-phenyl (and p-hydroxyphenyl)acetamido]-3-carbamoyloxymethyl-3-cephem-4-carboxylic acids'19794,082,912'Certain 7-acylamido-3-(2-carboxyalkyl-2,3-dihydro-s-triazolo[4,3-b]pyridazin-3-o n-6-ylmethyl)-3-cephem-4-carboxylic acids their salts and easily hydrolyzed esters'1978

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1978–1991Patents assigned to BRISTOL MYERS CO (18)· patent assignee history
1978–1993Based in Yokohama, JP· patent location history
1983–1984Based in Yokoyama, JP· patent location history
1992–1993Patents assigned to BRISTOL MYERS SQUIBB CO (5)· patent assignee history
1993Based in Yokahama, JP· patent location history
1997Patents assigned to TAKEDA CHEMICAL INDUSTRIES LTD (2)· patent assignee history
1997Patents assigned to WAKO PURE CHEM IND LTD (1)· patent assignee history
1997Based in Kanagawa, JP· patent location history
2000Patents assigned to WACO PURE CHEMICAL IND (1)· patent assignee history
2000Based in Saitama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BRISTOL MYERS CO181978–1991
BRISTOL MYERS SQUIBB CO51992–1993
TAKEDA CHEMICAL INDUSTRIES LTD21997
WACO PURE CHEMICAL IND12000
WAKO PURE CHEM IND LTD11997
Locations
LocationPatentsSpan
Yokohama, JP191978–1993
Kanagawa, JP21997
Yokoyama, JP21983–1984
Saitama, JP12000
Yokahama, JP11993