The patent EP3458510 was granted to Covestro Deutschland on May 24, 2023. The application was originally filed on May 19, 2017 under application number EP17725932A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE102009007762 |
| DESCRIPTION | DE1570703 |
| DESCRIPTION | DE2036052 |
| DESCRIPTION | DE2063050 |
| DESCRIPTION | DE2211956 |
| DESCRIPTION | DE3832396 |
| DESCRIPTION | DE3918406 |
| DESCRIPTION | EP0500496 |
| DESCRIPTION | EP0839623 |
| DESCRIPTION | FR1561518 |
| DESCRIPTION | JPS61105550 |
| DESCRIPTION | JPS6162039 |
| DESCRIPTION | JPS6162040 |
| DESCRIPTION | US2005215750 |
| DESCRIPTION | US2991273 |
| DESCRIPTION | US2999825 |
| DESCRIPTION | US2999846 |
| DESCRIPTION | US3028635 |
| DESCRIPTION | US3148172 |
| DESCRIPTION | US3271367 |
| DESCRIPTION | US4982014 |
| DESCRIPTION | WO2010072344 |
| DESCRIPTION | WO9615102 |
| INTERNATIONAL-SEARCH-REPORT | DE102009007762 |
| INTERNATIONAL-SEARCH-REPORT | EP2955201 |
| INTERNATIONAL-SEARCH-REPORT | US2005215750 |
| INTERNATIONAL-SEARCH-REPORT | WO2010072344 |
| OPPOSITION | JP2014210833 |
| OPPOSITION | JP2014218535 |
| OPPOSITION | US2005215750 |
NPL citations refer to non-patent references such as research papers, articles, or other publications cited during examination or opposition phases.
| Citation Phase | Reference Text |
|---|---|
| DESCRIPTION | - "Chemistry and Physics of Polycarbonates", SCHNELL, Polymer Reviews, INTERSCIENCE PUBLISHERS, (1964), vol. 9 |
| DESCRIPTION | - H. J. BUYSCH ET AL., Ullmann's Encyclopedia of Industrial Chemistry, 5th ed., VCH, (1991), vol. 19, page 348 |
| DESCRIPTION | - "Polycarbonates", D. FREITAG; U. GRIGO; P.R. MÜLLER; H. NOUVERTNE; BAYER AG, Encyclopedia of Polymer Science and Engineering, 2nd ed., (1988), vol. 11, pages 648 - 718 |
| DESCRIPTION | - "Polycarbonate", U. GRIGO; K. KIRCHNER; P.R. MÜLLER, Polycarbonate, Polyacetale, Polyester, Celluloseester, CARL HANSER VERLAG, (1992), vol. 3/1, pages 117 - 299 |
Get a free citation report including examiner, opposition, and international search citations.
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Date
Description
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Apr 28, 2023
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OPPO
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May 28, 2020
Decision to grant a European patent
Search/Exam
Apr 24, 2020
(Electronic) Receipt
Search/Exam
Apr 24, 2020
English translation of the claims
Search/Exam
Apr 24, 2020
French translation of claims
Search/Exam
Apr 24, 2020
Letter accompanying subsequently filed items
Search/Exam
Feb 20, 2020
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Intention to grant (signatures)
Search/Exam
Feb 20, 2020
Text intended for grant (clean copy)
Search/Exam
Feb 20, 2020
Feb 3, 2020
Examination started
Search/Exam
Jun 17, 2019
(Electronic) Receipt
Search/Exam
Jun 17, 2019
Annex
Search/Exam
Jun 17, 2019
Letter accompanying subsequently filed items
Search/Exam
Jun 17, 2019
Reply to Written Opinion prepared by the EPO
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Feb 27, 2019
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Communication to designated inventor
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Jan 4, 2019
Communication to designated inventor
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Jan 4, 2019
Communication to designated inventor
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Dec 22, 2018
Priority search results copy provided by EPO
Search/Exam
Dec 6, 2018
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Notification of the recording of a change
Search/Exam
Oct 25, 2018
(Electronic) Receipt
Search/Exam
Oct 25, 2018
Request for entry into the European phase
Search/Exam
Sep 28, 2018
Information on entry into European phase
Search/Exam
Dec 12, 2017
Nov 23, 2017
Copy of the international search report
Search/Exam
Nov 23, 2017
Copy of the international search report
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Nov 23, 2017
Published international application - A1
Search/Exam
Jul 7, 2017
ISR: cited documents
PCTISA
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(Electronic) Receipt
PCTRO
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(Electronic) Receipt
PCTRO
May 19, 2017
Abstract
PCTRO
May 19, 2017
Claims
PCTRO
May 19, 2017
Description
PCTRO
May 19, 2017
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