EP1544406A3

Colloidal and colloidal-like systems in aqueous, clay-based fluids

Abstract

The present invention generally relates to improved clay-based compositions comprising colloidal or colloidal-like phases (e.g., emulsions, aphrons) and methods of using those compositions. The compositions generally comprise an aqueous continuous phase, one or more palygorskite-sepiolite group clays, one or more surfactants, aphrons and optionally one or more Aphron Stabilizers. The compositions of the present invention are capable of being used in high-pressure applications.

Term

Term ended

Projected expiry passed 6 May 2024, 2.4 years ago.

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
WO0047691A1	Cites	World Intellectual Property Organization (WIPO)	Y	Search report	1-4,11-13,16-20,25-30
GB1404112A	Cites	United Kingdom	A	Search report	21,22
GB2153411A	Cites	United Kingdom	Y	Search report	1-4,11-13,16-20,25-30

7 members in 4 offices

This recordMember, by publication datePriority claim

Priority claims5

Priority claims
Document	Office	Kind	Date
468405P	United States of America	–	2003-05-06
46840503	United States of America	P	2003-05-06
46840503	United States of America	P	2003-05-06
468405P	–	–	–
US20030468405P	–	–	–

Members7

Family members, oldest first
Document	Office	Kind
CA2466549A1	Canada	A1	2004-11-06
NO20041860L	Norway	L	2004-11-08
US2005003967A1	United States of America	A1	2005-01-06
EP1544406A2	European Patent Office (EPO)	A2	2005-06-22
US7199085B2	United States of America	B2	2007-04-03
EP1544406A3This record	European Patent Office (EPO)	A3	2007-09-05
CA2466549C	Canada	C	2009-03-10

18 legal events, as the office reported them to INPADOC

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Events

Legal events, newest first
	Event	Code
2011-01-26	Application deemed to be withdrawnWithdrawn18D	18D
2010-12-24	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWNSTAA	STAA
2010-03-10	Information provided on ipc code assigned before grantRIC1	RIC1
2010-03-10	Information provided on ipc code assigned before grantRIC1	RIC1
2010-03-10	Information provided on ipc code assigned before grantRIC1	RIC1
2010-03-10	Information provided on ipc code assigned before grantRIC1	RIC1
2010-02-24	Information provided on ipc code assigned before grantRIC1	RIC1
2010-02-24	Information provided on ipc code assigned before grantRIC1	RIC1
2010-01-19	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP
2008-06-25	First examination report despatched17Q	17Q
2008-05-14	Designation fees paidAKX	AKX
2007-10-31	Request for examination filed17P	17P
2007-09-05	Designated contracting statesAK	AK
2007-09-05	Request for extension of the european patentAX	AX
2007-08-03	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL
2005-06-22	Designated contracting statesAK	AK
2005-06-22	Request for extension of the european patentAX	AX
2005-05-06	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI