Global patent index - EP 1087917 A1

EP 1087917 A1 2001-04-04 - METHOD FOR IMPROVING GRINDABILITY OF CEMENT AGGREGATES

Title (en)

METHOD FOR IMPROVING GRINDABILITY OF CEMENT AGGREGATES

Title (de)

VERFAHREN ZUM VERBESSERN DER MAHLBARKEIT VON ZEMENTZUSATZSTOFFEN

Title (fr)

PROCEDE POUR AMELIORER L'APTITUDE AU BROYAGE D'ADDITIFS POUR CIMENT

Publication

EP 1087917 A1 (DE)

Application

EP 00918559 A

Priority

  • AT 0000089 W
  • AT 25099 U

Abstract (en)

[origin: WO0063133A1] In order to improve grindability and regulate the hydraulic properties of cement aggregates, especially slags, soots or pozzolans, the cement aggregates are subjected to a treatment at temperatures ranging between 250 DEG C and 1000 DEG C before undergoing grinding.

IPC 1-7 (main, further and additional classification)

C04B 20/04; C04B 5/00

IPC 8 full level (invention and additional information)

C04B 7/38 (2006.01); C04B 5/00 (2006.01); C04B 20/04 (2006.01)

CPC (invention and additional information)

C04B 20/04 (2013.01); Y02W 30/92 (2015.05); Y02W 30/94 (2015.05)

Combination set (CPC)

  1. C04B 20/04 + C04B 18/141 + C04B 20/026
  2. C04B 20/04 + C04B 18/08 + C04B 20/026
  3. C04B 20/04 + C04B 14/14 + C04B 20/026

Citation (search report)

See references of WO 0063133A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0063133 A1 20001026; AU 3945200 A 20001102; BG 105095 A 20010731; BR 0006046 A 20010313; CA 2333415 A1 20001026; CN 1300270 A 20010620; CZ 20010099 A3 20020313; EP 1087917 A1 20010404; HU 0103322 A2 20011228; HU 0103322 A3 20021128; ID 27021 A 20010222; JP 2002542140 A 20021210; MA 25435 A1 20020701; SK 19162000 A3 20010911; ZA 200006775 B 20020220

INPADOC legal status

2002-12-18 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20020617

2002-01-23 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20011205

2001-05-16 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20010322

2001-04-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-04-04 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Ref Legal Event Code: AX

- Free Format Text: RO PAYMENT 20001213