Global Patent Index - EP 0773555 B1

EP 0773555 B1 2000-07-05 - Neutron-shielding hydraulic hardening material and method of manufacturing neutron shields using the same

Title (en)

Neutron-shielding hydraulic hardening material and method of manufacturing neutron shields using the same

Title (de)

Hydraulisch erhärtendes Neutronschutzmaterial und Verfahren zur Neutronschutzherstellung derselben

Title (fr)

Matériau de protection contre les neutrons à durcissement hydraulique et procédé de fabrication d'écrans neutroniques qui l'utilise

Publication

EP 0773555 B1 (EN)

Application

EP 96118207 A

Priority

JP 29438595 A

Abstract (en)

[origin: EP0773555A1] The present invention provides a neutron-shielding hydraulic hardening material containing 10-50% by weight of hydraulic cement, 30-88% by weight of aluminum hydroxide, and 0.1-35% by weight of boron carbide. The invention also provides a method of manufacturing a neutron shield. The method includes the steps of mixing 100 parts by weight of the hydraulic hardening material, 15-50 parts by weight of water, and not more than 5 parts by weight of at least one chemical admixture selected from the group consisting of air-entraining agents, air-entraining and water reducing agents, high-range water reducing agents, plasticizers, air-entraining and high-range water reducing agents, and foaming agents; and kneading the resultant mixture. The neutron-shielding hydraulic hardening material of the invention has an excellent neutron shielding effect, satisfactory strength of afterhardening product, and has good workability of fresh mortar. Therefore, when neutron shields are manufactured according to the method of the present invention, neutron shields with enhanced uniformity can be obtained.

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

G21F 1/04

IPC 8 full level (invention and additional information)

G21F 1/04 (2006.01); G21F 3/00 (2006.01)

CPC (invention and additional information)

G21F 1/042 (2013.01); G21Y 2002/104 (2013.01); G21Y 2002/501 (2013.01); G21Y 2004/10 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0773555 A1 19970514; EP 0773555 B1 20000705; DE 69609144 D1 20000810; DE 69609144 T2 20010322; JP 2929077 B2 19990803; JP H09133790 A 19970520

INPADOC legal status


2017-01-31 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

- Ref Country Code: GB

- Free text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

- Effective date: 20161112

2016-12-07 [REG GB PE20] PATENT EXPIRED AFTER TERMINATION OF 20 YEARS

- Expiry date: 20161112

2016-11-13 [REG DE R071] EXPIRY OF RIGHT

- Document: DE 69609144

2016-02-29 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20151126

- Year of fee payment: 20

2016-01-29 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20151209

- Year of fee payment: 20

2016-01-29 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20151124

- Year of fee payment: 20

2015-11-26 [REG FR PLFP] FEE PAYMENT

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- Year of fee payment: 20

2002-01-01 [REG GB IF02] EUROPEAN PATENT IN FORCE AS OF 2002-01-01

2001-06-20 [26N] NO OPPOSITION FILED

2000-09-29 [ET] FR: TRANSLATION FILED

2000-08-10 [REF] CORRESPONDS TO:

- Document: DE 69609144 20000810

2000-07-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

1999-09-22 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: JAPAN NUCLEAR CYCLE DEVELOPMENT INSTITUTE

1999-09-22 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: MITSUI ENGINEERING & SHIPBUILDING CO., LTD

1999-09-22 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: TAKENAKA CORPORATION

1999-09-22 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: TAIHEIYO CEMENT CORPORATION

1999-06-23 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: JAPAN NUCLEAR CYCLE DEVELOPMENT INSTITUTE

1999-06-23 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: MITSUI ENGINEERING & SHIPBUILDING CO., LTD

1999-06-23 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: TAKENAKA CORPORATION

1999-06-23 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: CHICHIBU ONODA CEMENT CORPORATION

1998-10-14 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19980826

1997-08-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19970610

1997-05-14 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB