EP0206575A3

Process for making fine powders

Abstract

Water soluble precursors of a desired final product are emulsified in an organic liquid that is subsequently heated to remove the free water from the emulsion droplets and further heated in a non-oxidising atmosphere to form a char. The carbon in the char maintains the separation between the dried droplet-derived particles. This char is then heated in air to oxidize and remove the carbon leaving particles of the desired product in the form of a powder.

Term

Term ended

Projected expiry passed 3 June 2006, 20.3 years ago.

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during
US3250832A	Cites	United States of America	A	Search report
US3647364A	Cites	United States of America	A	Search report
US4293514A	Cites	United States of America	A	Search report
US4487755A	Cites	United States of America	A	Search report

9 members in 5 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
745045	United States of America	–	1985-06-17
74504585	United States of America	A	1985-06-17
745045	–	–	–
US19850745045	–	–	–

Members9

Family members, oldest first
Document	Office	Kind
EP0206575A2	European Patent Office (EPO)	A2	1986-12-30
JPS6253730A	Japan	A	1987-03-09
US4654075A	United States of America	A	1987-03-31
CA1243693A	Canada	A	1988-10-25
EP0206575A3This record	European Patent Office (EPO)	A3	1990-03-28
EP0206575B1	European Patent Office (EPO)	B1	1993-02-24
DE3687803D1	Germany	D1	1993-04-01
DE3687803T2	Germany	T2	1993-06-09
JPH0720541B2	Japan	B2	1995-03-08

31 legal events, as 2 offices reported them to INPADOC

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Events

Legal events, newest first
	Event	Code	Office
2005-06-03	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1996-04-19	Notification of lapseLapsedST	ST	FR
1996-03-01	Nl: lapsed or anulled due to non-payment of the annual feeLapsedNLV4	NLV4	EP
1996-02-29	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1996-01-31	Gb: european patent ceased through non-payment of renewal feeCeasedGBPC	GBPC	EP
1996-01-01	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1995-06-03	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1995-03-01	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-12-31	Be: lapsedLapsedBERE	BERE	EP
1994-06-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
1994-06-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1994-04-08	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1994-03-25	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1994-02-16	No opposition filedOpposition26N	26N	EP
1993-12-24	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
1993-12-24	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
1993-07-09	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1993-06-23	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
1993-06-04	Fr: translation filedET	ET	EP
1993-04-01	Corresponds to:REF	REF	EP
1993-02-26	It: translation for a ep patent filedITF	ITF	EP
1993-02-26	It: translation for a ep patent filedITF	ITF	EP
1993-02-24	Designated contracting statesAK	AK	EP
1993-01-08	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
1991-12-11	First examination report despatched17Q	17Q	EP
1991-04-24	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
1990-10-17	Request for examination filed17P	17P	EP
1990-03-28	Designated contracting statesAK	AK	EP
1990-02-05	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1986-12-30	Designated contracting statesAK	AK	EP
1986-11-14	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Process for making fine powders

Abstract

Term

Priority claims4

Members9

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Events

Numbers

Titles3

Classification

Designated states6