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EP0156558

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Extract from the Register of European Patents

EP About this file: EP0156558

EP0156558 - Stable fiber optic polarizer [Right-click to bookmark this link]
Status	No opposition filed within time limit Status updated on 13.09.1989 Database last updated on 11.04.2026
Most recent event Tooltip	12.11.1999	Lapse of the patent in a contracting state New state(s): LU	published on 29.12.1999 [1999/52]
Applicant(s)	For all designated states Litton Systems, Inc. 360 North Crescent Drive Beverly Hills California 90210-9990 / US
	[N/P]
Former [1985/40]	For all designated states Litton Systems, Inc. 360 North Crescent Drive Beverly Hills California 90210-9990 / US
Inventor(s)	01 / Pavlath, George A. 3513 Calle Quebracho Thousand Oaks California 91360 / US
	[1985/40]
Representative(s)	Rushton, Ronald, et al Sommerville & Rushton, 45 Grosvenor Road St. Albans, Herts AL1 3AW / GB
	[N/P]
Former [1985/40]	Rushton, Ronald, et al SOMMERVILLE & RUSHTON 11 Holywell Hill St. Albans Hertfordshire AL1 1EZ / GB
Application number, filing date	85301558.4	07.03.1985
	[1985/40]
Priority number, date	US19840589977	16.03.1984 Original published format: US 589977
	[1985/40]
Filing language	EN
Procedural language	EN
Publication	Type:	A2 Application without search report
	No.:	EP0156558
	Date:	02.10.1985
	Language:	EN
	[1985/40]
	Type:	A3 Search report
	No.:	EP0156558
	Date:	20.11.1986
	Language:	EN
	[1986/47]
	Type:	B1 Patent specification
	No.:	EP0156558
	Date:	02.11.1988
	Language:	EN
	[1988/44]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	03.10.1986
Classification	IPC:	G02B6/28, G02B5/30	[1985/40]
	CPC:	G02B6/2733 (EP,US); G02B6/28 (KR); G02B6/276 (EP,US)
Designated contracting states	AT, BE, CH, DE, FR, GB, IT, LI, LU, NL, SE [1985/40]
Title	German:	Stabiler faseroptischer Polarisator	[1985/40]
	English:	Stable fiber optic polarizer	[1985/40]
	French:	Polariseur stable à fibre optique	[1985/40]
Examination procedure	19.02.1986	Examination requested [1986/17]
	27.04.1987	Despatch of a communication from the examining division (Time limit: M06)
	05.09.1987	Reply to a communication from the examining division
	03.11.1987	Despatch of communication of intention to grant (Approval: No)
	13.01.1988	Despatch of communication of intention to grant (Approval: later approval)
	26.04.1988	Communication of intention to grant the patent
	20.07.1988	Fee for grant paid
	20.07.1988	Fee for publishing/printing paid
Opposition(s)	03.08.1989	No opposition filed within time limit [1989/44]
Fees paid	Renewal fee
	26.02.1987	Renewal fee patent year 03
	05.03.1988	Renewal fee patent year 04
Opt-out from the exclusive Tooltip competence of the Unified Patent Court	See the Register of the Unified Patent Court for opt-out data
	Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition Tooltip	AT	02.11.1988
	BE	02.11.1988
	CH	02.11.1988
	LI	02.11.1988
	NL	02.11.1988
	SE	02.11.1988
	LU	31.03.1989
	[1999/52]
Former [1990/02]	AT	02.11.1988
	BE	02.11.1988
	CH	02.11.1988
	LI	02.11.1988
	NL	02.11.1988
	SE	02.11.1988
Former [1989/46]	AT	02.11.1988
	BE	02.11.1988
	NL	02.11.1988
	SE	02.11.1988
Former [1989/42]	BE	02.11.1988
	NL	02.11.1988
	SE	02.11.1988
Former [1989/35]	BE	02.11.1988
	SE	02.11.1988
Former [1989/24]	SE	02.11.1988
Documents cited:	Search	[Y] OPTICAL COMMUNICATION, NINTH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION - ECOC 83, Geneva, CH, 23rd-26th October 1983, pages 305-308, Elsevier Science Publishers B.V., NL; D. GRUCHMANN et al.: "Fibre-optic polarizers with high extinction ratio" [Y]
		[YD] APPLIED PHYSICS LETTERS, vol. 42, no. 6, 15th March 1983, pages 492-494, American Institute of Physics, New York, US; D.C. FLANDERS: "Submicrometer periodicity gratings as artificial anisotropic dielectrics" [YD]

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