The patent EP3291849 was granted to KCI Licensing on Jun 19, 2024. The application was originally filed on May 8, 2016 under application number EP16724555A. 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 |
|---|---|
| EXAMINATION | WO0128600 |
| INTERNATIONAL-SEARCH-REPORT | CN203576752U |
| INTERNATIONAL-SEARCH-REPORT | US2011257572 |
| INTERNATIONAL-SEARCH-REPORT | WO03090800 |
| OPPOSITION | EP0747062 |
| OPPOSITION | US2011257572 |
| OPPOSITION | US5128136 |
| OPPOSITION | US5242985 |
| OPPOSITION | US6699492 |
| OPPOSITION | US6939569 |
| OPPOSITION | WO0054593 |
| OPPOSITION | WO0128600 |
| OPPOSITION | WO2008091521 |
| OPPOSITION | WO2009082429 |
| OPPOSITION | WO2011103578 |
| OPPOSITION | WO2012092908 |
| OPPOSITION | WO9011795 |
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 |
|---|---|
| OPPOSITION | - Anonymous, "Information for Patiens about negative pressure wound therapy (NPWT)", (20150401), pages 1 - 8, Harrogate and District NHS, URL: https://www.hdft.nhs.uk/wp-content/uploads/2016/02/negative-pressure-wound-therapy.pdf, (20231031), XP093096819 |
| OPPOSITION | - Anonymous, "The National Formulary", The United States Pharmacopeia Convention, (20000101), pages 1368 - 1369, XP055933078 |
| OPPOSITION | - Lordi Nicholas G, "Chapter 14 - Sustained Release Dosage Forms", The Theory and Practice of Industrial Pharmacy THIRD EDITION, The British Library, (19860000), pages 430 - 456, XP055854167 |
| OPPOSITION | - Nptel-Noc Iitm, "Lecture 82 - Swelling of polymers", Youtube, (20201222), URL: https://www.youtube.com/watch?v=VWJiqzz2coU, XP093113434 |
| OPPOSITION | - Qin Yimin, "A brief description of the manufacturing processes for medical textile materials", Medical Textile Materials, The Textile Institute and Woodhead Publishing, (20160101), pages 42 - 74, 79-81, 86, XP093132509 |
| OPPOSITION | - Rowe Raymond C., Paul J Sheskey, Marian E Quinn, "Polycarbophil", Handbook of Pharmaceutical Excipients. 6th ed., PhP, (20090101), pages 509 - 512, XP093132504 |
| OPPOSITION | - "Solid oral modified-release dosage forms and drug delivery systems", Ansel's Pharmaceutical Dosage Forms and Drug Delivery Systems TENTH EDITION, Wolters Kluwer, (20140000), pages 299 - 314, XP055933079 |
| OPPOSITION | - Thomas Stephen, "Hydrocolloid Dressings", Wound Management and Dressings, Chapter 8, The Pharmaceutical Press, (19900101), pages 55 - 61, XP093092950 |
| OPPOSITION | - Gottlieb Moshe, "Swelling of Polymer Networks", Biological and Synthetic Polymer Networks, Dordrecht, Springer Netherlands, (19880101), pages 403 - 403, doi:10.1007/978-94-009-1343-1_27, ISBN 978-94-009-1343-1, XP093096769 |
| OPPOSITION | - Gottlieb Moshe, "Swelling of Polymer Networks", Gottlieb Moshe, Kramer O, Biological and Synthetic Polymer Networks, Dordrecht, Springer Netherlands, (19880101), pages 403 - 404, doi:10.1007/978-94-009-1343-1_27, ISBN 978-94-009-1343-1, XP093096769 |
| OPPOSITION | - DE HAAN et al., "Oral controlled release dosage forms", Pharmaceutisch Weekblad Scientific Edition, (19840000), vol. 6, doi:10.1007/BF01953956, pages 57 - 67, XP002534246 |
| OPPOSITION | - Anonymous, "A brief description of textile fibers", Anonymous, Yiimin Qin, Medical Textile Materials, Woodhead Publishing, (20160101), pages 23 - 42, doi:10.1016/B978-0-08-100618-4.00003-0, ISBN 978-0-08-100618-4, XP093096736 |
| OPPOSITION | - Yimin Qin, "Functional wound dressings", Yimin Qin, Yimin Qin, Medical Textile Materials, Woodhead Publishing, (20160101), pages 89 - 107, doi:10.1016/B978-0-08-100618-4.00007-8, ISBN 978-0-08-100618-4, XP093096740 |
| OPPOSITION | - Yimin Qin, "Medical textile products for the control of odor", Yimin Qin, Yimin Qin, Medical Textile Materials, Woodhead Publishing, (20160101), pages 162 - 173, doi:10.1016/B978-0-08-100618-4.00012-1, ISBN 978-0-08-100618-4, XP093096747 |
| OPPOSITION | - John H. Northrop , M. Kunitz, "The swelling pressure of gelatin and the mechanism of swelling in water and natural salt solutions", The Journal of General Physiology, (19260620), vol. 10, no. 1, doi:10.1085/jgp.10.1.161, pages 161 - 177, XP093096727 |
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French translation of claims
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German translation of the claims
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Examination started
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Communication to designated inventor
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Request for entry into the European phase
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Published international application - A1
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