Patents by Inventor Rolf Petri

Rolf Petri has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Aqueous polymer dispersions
    Patent number: 5696185
    Abstract: Aqueous dispersions of polymers which have a high glass transition temperature and a low average molecular weight and contain a specific amount of methacrylic acid as polymerized units are suitable, in liquid or dried form, as additives for improving the flow behavior of cement-containing mineral building materials having binding properties.
    Type: Grant
    Filed: July 17, 1996
    Date of Patent: December 9, 1997
    Assignee: BASF Aktiengesellschaft
    Inventors: Wilhelm Friedrich Beckerle, Rolf Petri, Bernhard Dotzauer, Manfred Schwartz, Maximilian Angel
  • Aqueous polymer dispersions
    Patent number: 5576404
    Abstract: Aqueous dispersions of polymers which have a high glass transition temperature and a low average molecular weight and contain a specific amount of methacrylic acid as polymerized units are suitable, in liquid or dried form, as additives for improving the flow behavior of cement-containing mineral building materials having binding properties.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: November 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Wilhelm F. Beckerle, Rolf Petri, Bernhard Dotzauer, Manfred Schwartz, Maximilian Angel
  • Aqueous polymer dispersions
    Patent number: 5512629
    Abstract: Aqueous dispersions of polymers which have a high glass transition temperature and a low average molecular weight and contain a specific amount of methacrylic acid as polymerized units are suitable, in liquid or dried form, as additives for improving the flow behavior of cement-containing mineral building materials having binding properties.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: April 30, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Wilhelm F. Beckerle, Rolf Petri, Bernhard Dotzauer, Manfred Schwartz, Maximilian Angel
  • Polymer-coated precast concrete
    Patent number: 5215827
    Abstract: Precast concrete which is coated with a copolymer A with a glass transition temperature of rom -25.degree. to +30.degree. C. and composed ofa) from 0.1 to 10% by weight of a monomer of the formula I ##STR1## where R.sup.1 and R.sup.2 are each --H or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is a bridge of from 1 to 20 carbons,R.sup.4 is --C(O)R.sup.6, --C(O)OR.sup.6 or -CNR.sup.5 is --H, --C(OR)R.sup.9, --C(O)OR.sup.9 or --CNX is --O-- or --NR.sup.7 --,Z is a single bond, --CH.sub.2 --, --O--, --NR.sup.8 -- or --O--C(O)-- andR.sup.6, R.sup.7, R.sup.8 and R.sup.9 are each --H, alkyl, aryl, alkaryl or aralkyl of up to 12 carbons,b) from 85 to 99.
    Type: Grant
    Filed: December 4, 1991
    Date of Patent: June 1, 1993
    Assignee: BASF Aktiengesellschaft
    Inventors: Bernhard Dotzauer, Eckehardt Wistuba, Manfred Schwartz, Rolf Petri, Bertold Bechert, Hans-Juergen Denu
  • Mono- and/or di-alkyl phosphates as additives for hydraulic binders
    Patent number: 4018618
    Abstract: Mono- or di-alkyl phosphate or their alkali metal salts or optionally substituted ammonium salts for use as antifoaming and hydrophobizing additives for hydraulic binders.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: April 19, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Rolf Petri, Harry Distler, Bertold Bechert