Global Patent Index - EP 0849013 B1

EP 0849013 B1 2001-04-11 - Advanced forming techniques for superplastic forming

Title (en)

Advanced forming techniques for superplastic forming

Title (de)

Verbesserte Formtechnik für superplastische Formung

Title (fr)

Technique de formage améliorée pour le formage superplastique

Publication

EP 0849013 B1 (EN)

Application

EP 97203563 A

Priority

US 77372896 A

Abstract (en)

[origin: EP0849013A1] This application describes a method for superplastic forming (SPF) of metallic parts in which a cutout is formed in the blank from which the parts will be formed, and a secondary sheet is located between the blank and the pressurized gas. The cutout area of the blank becomes stretched so that there is minimal thinning in the area near the periphery of the cutout(s) in the blank, the secondary sheet is required to carry the gas pressure and to form the parts. <IMAGE> <IMAGE> <IMAGE>

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

B21D 26/02

IPC 8 full level (invention and additional information)

B21D 26/055 (2011.01)

CPC (invention and additional information)

B21D 26/055 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0849013 A1 19980624; EP 0849013 B1 20010411; CA 2221076 A1 19980621; DE 69704541 D1 20010517; DE 69704541 T2 20010809; US 5862695 A 19990126

INPADOC legal status


2003-09-12 [REG FR ST] NOTIFICATION OF LAPSE

2003-07-31 [PG25 FR] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20030731

2003-07-02 [GBPC] GB: EUROPEAN PATENT CEASED THROUGH NON-PAYMENT OF RENEWAL FEE

2003-06-03 [PG25 DE] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20030603

2002-11-14 [PG25 GB] LAPSED IN A CONTRACTING STATE ANNOUNCED VIA POSTGRANT INFORM. FROM NAT. OFFICE TO EPO

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- Free text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

- Effective date: 20021114

2002-04-03 [26N] NO OPPOSITION FILED

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

2001-10-18 [PGFP DE] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20011018

- Year of fee payment: 5

2001-10-18 [PGFP FR] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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- Payment date: 20011018

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2001-10-18 [PGFP GB] POSTGRANT: ANNUAL FEES PAID TO NATIONAL OFFICE

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2001-08-10 [ET] FR: TRANSLATION FILED

2001-05-17 [REF] CORRESPONDS TO:

- Document: DE 69704541 20010517

2001-04-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: B1

- Designated State(s): DE FR GB

1999-03-31 [17Q] FIRST EXAMINATION REPORT

- Effective date: 19990212

1999-03-10 [AKX] PAYMENT OF DESIGNATION FEES

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1999-03-10 [RBV] DESIGNATED CONTRACTING STATES (CORRECTION):

- Designated State(s): DE FR GB

1999-02-03 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19981208

1998-06-24 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE FR GB

1998-06-24 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

- Free text: AL;LT;LV;MK;RO;SI