EP1801351A3

Turbine blade tip cooling

Abstract

A turbine engine blade (20) has an attachment root (42), a platform (40) outboard of the attachment root (42), and an airfoil (22) extending from the platform (40). The airfoil (22) has pressure and suction sides (34, 36) extending between leading and trailing edges (30, 32). An internal cooling passageway network includes at least one inlet (44) in the root (42) and a plurality of outlets (334, 376) along the airfoil. The passageway network includes a leading spanwise cavity (310) fed by a first trunk (323). A streamwise cavity (324) is inboard of a tip (26) of the airfoil. A spanwise feed cavity (326) feeds the streamwise cavity (324) absent down-pass. A second trunk (327) feeds the spanwise feed cavity (326).

EP1801351A3, drawing sheet 1 — Sheet 1 of 2

Term

0.2 yearsto projected expiry

Projected expiry 18 December 2026, counted from filing; an application has no term until it is granted.

2 sheets

Sheet 1
Sheet 2

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
EP0896127A2	Cites	European Patent Office (EPO)	X	Search report	1-4,6,7,16,17,19,20
EP1798374A2	Cites	European Patent Office (EPO)	E	Search report	1,6,16
US2005084370A1	Cites	United States of America	X	Search report	8-10,12-14
US4767268A	Cites	United States of America	X	Search report	1-20
US5403159A	Cites	United States of America	X	Search report	1-4,6,8-17,19,20
US5902093A	Cites	United States of America	X	Search report	1,2,4,6,7,16,17
US6227804B1	Cites	United States of America	X	Search report	8,9,11,12
WO9615358A1	Cites	World Intellectual Property Organization (WIPO)	X	Search report	1,8-11
JPH06137102A	Cites	Japan	X	Search report	1,3,4,6,8-14,16,17,19,20
JPS60135606A	Cites	Japan	X	Search report	19,20

10 members in 7 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
317394	United States of America	–	2005-12-22
31739405	United States of America	A	2005-12-22
317394	–	–	–
US20050317394	–	–	–

Members10

Family members, oldest first
Document	Office	Kind
CN1987054A	China	A	2007-06-27
EP1801351A2	European Patent Office (EPO)	A2	2007-06-27
KR20070066843A	Republic of Korea	A	2007-06-27
US2007147997A1	United States of America	A1	2007-06-28
TW200724775A	Taiwan Province of China	A	2007-07-01
JP2007170379A	Japan	A	2007-07-05
SG133467A1	Singapore	A1	2007-07-30
US7413403B2	United States of America	B2	2008-08-19
EP1801351A3This record	European Patent Office (EPO)	A3	2010-11-24
EP1801351B1	European Patent Office (EPO)	B1	2016-03-02

30 legal events, as 3 offices reported them to INPADOC

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Events

Legal events, newest first
	Event	Code	Office
2026-01-09	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2025-01-17	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2021-11-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2021-07-01	Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119	R119	DE
2020-01-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2017-07-24	Change of applicant/patenteeR081	R081	DE
2017-07-24	Change of representativeR082	R082	DE
2017-07-12	Change of representativeR082	R082	DE
2017-02-08	No opposition filedOpposition26N	26N	EP
2017-01-06	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2017-01-06	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2016-12-05	No opposition filed against granted patent, or epo opposition proceedings concluded without decisionGrantedR097	R097	DE
2016-10-26	Party data changed (patent owner data changed or rights of a patent transferred)RAP2	RAP2	EP
2016-04-14	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
2016-03-07	Change of applicant/patenteeR081	R081	DE
2016-03-02	Designated contracting statesAK	AK	EP
2016-03-02	European patent grantedGrantedFG4D	FG4D	GB
2016-01-29	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2015-11-10	Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS	GRAS	EP
2015-08-05	Intention to grant announcedINTG	INTG	EP
2015-07-06	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP	EP
2014-01-22	First examination report despatched17Q	17Q	EP
2011-07-27	Designation fees paidAKX	AKX	EP
2011-07-06	Request for examination filed17P	17P	EP
2010-11-24	Designated contracting statesAK	AK	EP
2010-11-24	Request for extension of the european patentAX	AX	EP
2010-10-22	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
2007-06-27	Designated contracting statesAK	AK	EP
2007-06-27	Request for extension of the european patentAX	AX	EP
2007-05-25	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Turbine blade tip cooling

Abstract

Term

Priority claims4

Members10

Over the term

Events

Numbers

Titles3

Classification

Designated states2