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The patent EP3752283 was granted to Praxair Technology on Apr 27, 2022. The application was filed on Feb 14, 2019 under application number EP19709171A. The patent is currently recorded with a legal status of "Granted And Under Opposition".

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.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| LAIR LIQUIDE | Jan 26, 2023 | AIR LIQUIDE | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP1080771 |
| DESCRIPTION | EP2198946 |
| DESCRIPTION | US4249915 |
| DESCRIPTION | US5897686 |
| DESCRIPTION | US6284021 |
| DESCRIPTION | US6500234 |
| DESCRIPTION | US6503299 |
| DESCRIPTION | US8123835 |
| DESCRIPTION | US8814985 |
| EXAMINATION | WO2018119084 |
| INTERNATIONAL-SEARCH-REPORT | DE19826209 |
| INTERNATIONAL-SEARCH-REPORT | EP1080771 |
| INTERNATIONAL-SEARCH-REPORT | WO2008109882 |
| OPPOSITION | EP0297542 |
| OPPOSITION | FR2794993 |
| OPPOSITION | WO2010072404 |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
Date
Description
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Decision to grant a European patent
Search/Exam
Feb 17, 2022
Payment submission rejected
Search/Exam
Feb 9, 2022
(Electronic) Receipt
Search/Exam
Feb 9, 2022
Feb 9, 2022
French translation of claims
Search/Exam
Feb 9, 2022
German translation of the claims
Search/Exam
Feb 9, 2022
Letter accompanying subsequently filed items
Search/Exam
Feb 9, 2022
Jan 27, 2022
(Electronic) Receipt
Search/Exam
Jan 27, 2022
General authorisation
Search/Exam
Jan 27, 2022
Letter accompanying subsequently filed items
Search/Exam
Jan 27, 2022
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Nov 15, 2021
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Intention to grant (signatures)
Search/Exam
Oct 27, 2021
Text intended for grant (clean copy)
Search/Exam
Oct 27, 2021
Oct 19, 2021
Oct 14, 2021
Annex to a communication
Search/Exam
Oct 14, 2021
Annex to the communication
Search/Exam
Oct 14, 2021
Consultation by telephone/in person
Search/Exam
Oct 14, 2021
Sep 21, 2021
(Electronic) Receipt
Search/Exam
Sep 21, 2021
Amended claims with annotations
Search/Exam
Sep 21, 2021
Amended description with annotations
Search/Exam
Sep 21, 2021
Claims
Search/Exam
Sep 21, 2021
Description
Search/Exam
Sep 21, 2021
Letter accompanying subsequently filed items
Search/Exam
Sep 21, 2021
May 14, 2021
Annex to the communication
Search/Exam
May 14, 2021
Communication from the Examining Division
Search/Exam
May 7, 2021
Examination started
Search/Exam
Mar 15, 2021
(Electronic) Receipt
Search/Exam
Mar 15, 2021
Mar 15, 2021
Amended claims with annotations
Search/Exam
Mar 15, 2021
Amended claims with annotations
Search/Exam
Mar 15, 2021
Mar 15, 2021
Amendments received before examination
Search/Exam
Mar 15, 2021
Letter accompanying subsequently filed items
Search/Exam
Nov 25, 2020
Sep 22, 2020
Sep 18, 2020
Communication to designated inventor
Search/Exam
Sep 18, 2020
Communication to designated inventor
Search/Exam
Sep 18, 2020
Communication to designated inventor
Search/Exam
Sep 18, 2020
Communication to designated inventor
Search/Exam
Aug 31, 2020
Aug 17, 2020
(Electronic) Receipt
Search/Exam
Aug 17, 2020
Request for entry into the European phase
Search/Exam
Jun 26, 2020
Information on entry into European phase
Search/Exam
Sep 10, 2019
Aug 22, 2019
Copy of the international search report
Search/Exam
Aug 22, 2019
Published international application - A1
Search/Exam
May 15, 2019
ISR: cited documents
PCTISA
May 15, 2019
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Mar 21, 2019
Mar 4, 2019
Abstract
PCTISA
Mar 4, 2019
Annex
PCTISA
Mar 4, 2019
Claims
PCTISA
Mar 4, 2019
Description
PCTISA
Mar 4, 2019
Drawings
PCTISA
Mar 4, 2019
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