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EP0549132
European procedure
Extract from the Register of European Patents
EP About this file: EP0549132
| EP0549132 - Article comprising a semiconductor body and means for modulating the optical transparency of the same [Right-click to bookmark this link] | Status | No opposition filed within time limit Status updated on 12.02.1999 Database last updated on 13.11.2024 | Most recent event Tooltip | 12.02.1999 | No opposition filed within time limit | published on 31.03.1999 [1999/13] | Applicant(s) | For all designated states AT&T Corp. 32 Avenue of the Americas New York, NY 10013-2412 / US | [1994/40] |
| Former [1993/26] | For all designated states AT&T Corp. 32 Avenue of the Americas New York, NY 10013-2412 / US | Inventor(s) | 01 /
Gorfinkel, Vera B. Naberezhnaya Kosmonavtov 5, Apt. 49 Saratov 410002 / RU | 02 /
Luryi, Sergey 907 Papen Road Bridgewater, New Jersey 08807 / US | [1993/26] | Representative(s) | Watts, Christopher Malcolm Kelway, et al Lucent Technologies (UK) Ltd, 5 Mornington Road Woodford Green Essex, IG8 0TU / GB | [N/P] |
| Former [1993/26] | Watts, Christopher Malcolm Kelway, Dr., et al AT&T (UK) Ltd. 5, Mornington Road Woodford Green Essex, IG8 0TU / GB | Application number, filing date | 92310676.9 | 23.11.1992 | [1993/26] | Priority number, date | US19910814745 | 24.12.1991 Original published format: US 814745 | [1993/26] | Filing language | EN | Procedural language | EN | Publication | Type: | A2 Application without search report | No.: | EP0549132 | Date: | 30.06.1993 | Language: | EN | [1993/26] | Type: | A3 Search report | No.: | EP0549132 | Date: | 22.09.1993 | Language: | EN | [1993/38] | Type: | B1 Patent specification | No.: | EP0549132 | Date: | 08.04.1998 | Language: | EN | [1998/15] | Search report(s) | (Supplementary) European search report - dispatched on: | EP | 06.08.1993 | Classification | IPC: | G02F1/015 | [1993/26] | CPC: |
B82Y20/00 (EP,US);
G02F1/01716 (EP,US);
G02F1/017 (EP,US);
G02F1/0156 (EP,US);
G02F1/01775 (EP,US)
| Designated contracting states | DE, FR, GB [1993/26] | Title | German: | Vorrichtung mit Halbleiterkörper und Mitteln zur Modulation der optischen Transparenz desselben | [1993/26] | English: | Article comprising a semiconductor body and means for modulating the optical transparency of the same | [1993/26] | French: | Dispositif comprenant un corps semi-conducteur et des moyens pour moduler sa transparence optique | [1993/26] | Examination procedure | 10.03.1994 | Examination requested [1994/19] | 06.11.1995 | Despatch of a communication from the examining division (Time limit: M06) | 12.03.1996 | Reply to a communication from the examining division | 19.09.1996 | Despatch of a communication from the examining division (Time limit: M04) | 20.01.1997 | Reply to a communication from the examining division | 25.08.1997 | Despatch of communication of intention to grant (Approval: Yes) | 08.10.1997 | Communication of intention to grant the patent | 10.12.1997 | Fee for grant paid | 10.12.1997 | Fee for publishing/printing paid | Opposition(s) | 09.01.1999 | No opposition filed within time limit [1999/13] | Fees paid | Renewal fee | 16.11.1994 | Renewal fee patent year 03 | 17.11.1995 | Renewal fee patent year 04 | 18.11.1996 | Renewal fee patent year 05 | 07.11.1997 | Renewal fee patent year 06 |
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| Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court. | Documents cited: | Search | [A]EP0306400 (THOMSON CSF [FR]); | [X]EP0432035 (THOMSON CSF [FR]); | [X] - APPLIED PHYSICS LETTERS. vol. 50, no. 11, March 1987, NEW YORK US pages 685 - 687 A. HARWIT ET AL. 'Observation of Stark Shifts in Quantum Well Intersubband Transitions' | [X] - PAN J. L., ET AL., "INDUCING NORMALLY FORBIDDEN TRANSITIONS WITHIN THE CONDUCTION BAND OF GAAS QUANTUM WELLS.", Applied Physics Letters, A I P Publishing LLC, US, US, (19900723), vol. 57., no. 04., doi:10.1063/1.103693, ISSN 0003-6951, pages 366 - 368., XP000150127 DOI: http://dx.doi.org/10.1063/1.103693 | [XP] - GORFINKEL V. B., LURYI S., "RAPID MODULATION OF INTERBAND OPTICAL PROPERTIES OF QUANTUM WELLS BY INTERSUBBAND ABSORPTION.", Applied Physics Letters, A I P Publishing LLC, US, US, (19920622), vol. 60., no. 25., doi:10.1063/1.106749, ISSN 0003-6951, pages 3141 - 3143., XP000280708 DOI: http://dx.doi.org/10.1063/1.106749 | [A] - JOURNAL OF APPLIED PHYSICS. vol. 68, no. 12, December 1990, NEW YORK US pages 6529 - 6531 S. NODA ET AL. 'All-Optical Modulation Using a n-doped Quantum-Well Structure' |