SYBRON CHEMICALS INC

Q: Jun 30 2000

Q: Jun 30 2000

Q: Mar 31 2000

FY: Dec 31 1999

FY: Dec 31 1999

Q: Sep 30 1999

Q: Jun 30 1999

Q: Mar 31 1999

FY: Dec 31 1998

Q: Sep 30 1998

Q: Jun 30 1998

Q: Mar 31 1998

FY: Dec 31 1997

Q: Sep 30 1997

Q: Jun 30 1997

Q: Jun 30 1997

Q: Mar 31 1997

FY: Dec 31 1996

Q: Nov 13 1996

Q: Aug 14 1996

2,7

Current report pursuant to Section 13 or 15(d)

5,7

5,7

2,7

Certification of termination of registration of a class of securities (Section 12(g))

Registration of Securities on Exchange (amendment)

Registration of Securities on Exchange (amendment)

Registration of Securities on Exchange

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Registration of Securities on Exchange

Registration of Securities on Exchange

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Definitive Proxy Statement

Required Information in Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

Definitive Proxy Statement

BAYER CORP

GABELLI FUNDS INC ET AL

BAYER CORP

GABELLI FUNDS INC ET AL

BAYER CORP

BAYER CORP

BAYER CORP

BAYER CORP

BAYER CORP

BAYER CORP

BAYER CORP

SYBRON CHEMICALS INC

BAYER CORP

BAYER CORP

BAYER CORP

SYBRON CHEMICALS INC

SYBRON CHEMICALS INC

MENTOR PARTNERS LP

CITIGROUP INC

GABELLI FUNDS INC ET AL