The patent EP2814981 was granted to Streck on Apr 28, 2021. The application was originally filed on Feb 13, 2013 under application number EP13706856A. 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 | EP2674502 | 
| INTERNATIONAL-SEARCH-REPORT | US2010184069 | 
| OPPOSITION | EP2228453 | 
| OPPOSITION | WO2013123030 | 
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 | 
|---|---|
| INTERNATIONAL-SEARCH-REPORT | - Schatz et al., "PRESERVATION OF CELL-FREE DNA IN STORED BLOOD SAMPLES FOR THE ANALYSIS OF THE (M)SEPT9 COLORECTAL CANCER SCREENING MARKER ENABLES SAMPLE SHIPMENT BY MAIL", Published as a poster at the conference on international federation of clinical chemistry and laboratory medicine Worldlab and EU, Berlin, Germany, (201105), URL: http://www.epiprocolon.com/uploads/tx_txpublicationslist/epi-poster-IFCC-1-A4.pdf, (20130625), XP002699458 [X] 1-20 * the whole document * | 
| OPPOSITION | - Cindy Christensen, "Streck introduces tube for the preservation of cell-free DNA", Press release, (20080725), XP055419771 | 
| OPPOSITION | - Das et al, "Acta Histochemica", (20130000), vol. 115, pages 481 - 486 | 
| OPPOSITION | - FERNANDO et al., "A new methodology to preserve the original proportion and integrity of cell-free fetal DNA in maternal plasma during sample processing and storage", Prenat Diagn, (20100000), vol. 30, pages 418 - 424 | 
| OPPOSITION | - JUNG et al., "Cell-free DNA in the blood as a solid tumor biomarker—A critical appraisal of the literature", Clinica Chimica Acta, (20100000), vol. 411, no. 21-22, pages 1611 - 1624, XP027266941 | 
| OPPOSITION | - KWEE et al., "Measurement of Circulating Cell-Free DNA in Relation to 18F-Fluorocholine PET/CT Imaging in Chemotherapy-Treated Advanced Prostate Cancer", Clin. Transl. Scie, (20120000), vol. 5, no. 1, pages 65 - 70 | 
| OPPOSITION | - Streck, "Cell -Free DNA BCT", Datasheet, (20080819), XP055419777 | 
| OPPOSITION | - Streck, "Product Summary: Cell-Free DNA™ BCT", Brochure, (20090107), URL: https://www.bioprocessonline.com/doc/streck-dna-bct-0002, XP055419765 | 
| OPPOSITION | - FERNANDO et al., "A new methodology to preserve the original proportion and integrity of cell-free fetal DNA in maternal plasma during sample processing and storage", Prenat Diagn, (20100000), vol. 30, pages 418 - 424, XP055477556 | 
| OPPOSITION | - LO et al., "Presence of fetal DNA in maternal plasma and serum", Lancet, (19970000), vol. 350, no. 9076, pages 485 - 487, XP005106839 | 
| OPPOSITION | - LO et al., "Quantitative Analysis of Fetal DNA in Maternal Plasma and Serum: Implications for Noninvasive Prenatal Diagnosis", J. Hum. Genet., (19980000), vol. 62, no. 4, pages 768 - 775, XP009002852 | 
| OPPOSITION | - KWEE et al., "Measurement of Circulating Cell-Free DNA in Relation to 18F-Fluorocholine PET/CT Imaging in Chemotherapy-Treated Advanced Prostate Cancer", Clin. Transl. Scie, (20120000), vol. 5, no. 1, pages 65 - 70, XP055477571 | 
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Published international application - A2
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Abstract
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