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The patent EP1991688 was granted to Dupont Tate & Lyle BIO Products on May 1, 2019. The application was filed on Feb 12, 2007 under application number EP07750663A. The patent is currently recorded with a legal status of "Revoked".

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 |
|---|---|---|---|
| DSM NUTRITIONAL PRODUCTS | Jan 31, 2020 | KRAUS & LEDERER PARTGMBB | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | US2005069997 |
| DESCRIPTION | US2434110 |
| DESCRIPTION | US5034134 |
| DESCRIPTION | US510036 |
| DESCRIPTION | US5334778 |
| EXAMINATION | CN1687433 |
| INTERNATIONAL-SEARCH-REPORT | US2005069997 |
| INTERNATIONAL-SEARCH-REPORT | US2005154114 |
| OPPOSITION | JPH05221821 |
| OPPOSITION | US2005020805 |
| OPPOSITION | WO2004095255 |
| OPPOSITION | WO2004101479 |
| OTHER | CN1687433 |
| OTHER | CN1687433K |
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.
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Description
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Letter accompanying subsequently filed items
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Claims
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Notice of appeal
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May 13, 2019
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Decision to grant a European patent
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Mar 19, 2019
(Electronic) Receipt
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Mar 19, 2019
Filing of the translations of the claims
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Mar 19, 2019
French translation of claims
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German translation of the claims
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Mar 19, 2019
Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Amended claims with annotations
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Amended claims with annotations
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Amended description with annotations
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Claims
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Description
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Letter accompanying subsequently filed items
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Advice of delivery
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Advice of delivery
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May 15, 2018
Acknowledgement of a document
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Annex to the communication
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May 15, 2018
Summons to attend oral proceedings
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Apr 18, 2018
Preparation for oral proceedings
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Mar 9, 2017
(Electronic) Receipt
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Mar 9, 2017
Amended claims with annotations
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Claims
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Letter accompanying subsequently filed items
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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Aug 30, 2016
Annex to the communication
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Aug 30, 2016
Communication from the Examining Division
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Decision to allow further processing
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Feb 29, 2016
Amended claims with annotations
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Claims
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Letter accompanying subsequently filed items
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Request for further processing
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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Amended claims with annotations
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Claims
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Letter accompanying subsequently filed items
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Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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Submission concerning representation
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Decision to allow further processing
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Apr 16, 2013
Amended claims with annotations
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Annex
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Apr 16, 2013
Claims
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Letter accompanying subsequently filed items
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Request for further processing
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Observations by third parties
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Patent document filed by a Third party
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Patent document filed by a Third party
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Feb 6, 2013
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(Electronic) Receipt
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Letter accompanying subsequently filed items
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Jun 22, 2012
Annex to the communication
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Communication from the Examining Division
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(Electronic) Receipt
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Amendments received before examination
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Jan 9, 2012
Letter accompanying subsequently filed items
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Jan 9, 2012
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European search opinion
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Supplementary European search report
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Jun 30, 2010
Submission concerning representation
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Jun 30, 2010
Submission concerning representation
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Apr 6, 2009
Letter concerning the inventor
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Oct 27, 2008
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Letter concerning the inventor
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Letter which had not been notified
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Letter concerning the inventor
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Sep 9, 2008
(Electronic) Receipt
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Request for entry into the European phase
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Sep 9, 2008
Submission concerning representation
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Aug 25, 2008
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Letter which had not been notified
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Jun 27, 2008
Information on entry into European phase
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Feb 21, 2008
Copy of the international search report
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Aug 23, 2007
Published international application - A2
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