Prior art

To identify the most relevant prior art for US patent 11261566, I will examine the "Citations" section of the patent document, which lists prior art cited by the examiner and/or third parties. Under 35 U.S.C. § 102, prior art can anticipate a patent claim if it discloses every limitation of the claim, either explicitly or inherently.

Here is an analysis of the cited prior art:

Prior Art Cited by Examiner:

1. EP0425523B1

• Full Citation: EP0425523B1 (en) - Scapa Group Plc.
• Publication/Filing Date: Priority date: 1988-06-17, Publication date: 1995-03-15.
• Brief Description: This patent proposes the use of flat-woven webs for producing endless belt loops for paper machines. It describes folding a flat-woven web of twice the necessary length to create a two-layer laminate structure, removing CD threads at the folds to produce seam loops, and then making the base structure endless by interengaging these seam loops and inserting an insertion element.
• Potential Anticipated Claim(s): This reference appears to be highly relevant to the fundamental structure and method of forming seamable fabrics from flat-woven elements. It could potentially anticipate the broad concept of a clothing comprising a two-layer laminate structure from flat-woven fabrics with MD threads forming seam loops, connected by an interengaged seam and insertion element, as described in the preamble of Claim 1. Specifically, elements such as the "base structure including a two-layer laminate structure formed of one or a plurality of flat-woven fabrics, said base structure having two end sides" and the general method of making the clothing endless by "interengaging said seam loops of said two end sides and an insertion of an insertion element" are disclosed.

2. US6189577B1

• Full Citation: US6189577B1 (en) - Astenjohnson, Inc. - Papermakers fabric with stacked machine direction yarns.
• Publication/Filing Date: Priority date: 1990-06-06, Publication date: 2001-02-20.
• Brief Description: This patent relates to papermaker's fabrics with stacked machine direction yarns. The description provided in the full patent text for US11261566 notes that US6189577B1 is an examiner-cited reference. Without a more detailed description of US6189577B1's content from the provided text, it's difficult to pinpoint its exact disclosure relevant to 35 U.S.C. § 102.
• Potential Anticipated Claim(s): Further analysis of the full text of US6189577B1 would be required to determine specific claim anticipation. However, based on its title, it likely pertains to the structure and arrangement of MD yarns within papermaker's fabrics.

3. US20090090425A1

• Full Citation: US20090090425A1 (en) - Hawes John M - Flat woven full width on-machine-seamable fabric.
• Publication/Filing Date: Priority date: 2007-10-05, Publication date: 2009-04-09.
• Brief Description: This patent publication describes a flat-woven, full-width, on-machine-seamable fabric. Similar to US6189577B1, a detailed description of its content is not available in the provided text.
• Potential Anticipated Claim(s): Given its title, this document likely relates to the construction of seamable fabrics from flat-woven elements, a core aspect of US11261566. Further examination of this reference is needed to identify specific anticipated claims.

4. US20090211722A1

• Full Citation: US20090211722A1 (en) - Voith Patent Gmbh - Belt and method of making a belt for a paper making machine.
• Publication/Filing Date: Priority date: 2008-02-25, Publication date: 2009-08-27.
• Brief Description: This patent publication, also from the assignee Voith Patent GmbH, describes a belt and method of making a belt for a paper making machine. Without specific details of its content, a precise anticipation analysis is limited.
• Potential Anticipated Claim(s): As it is from the same assignee and concerns paper machine belts, it could potentially disclose aspects of the base structure, seam formation, or thread characteristics. Further review of the full document would be necessary.

5. US20170044718A1

• Full Citation: US20170044718A1 (en) - Voith Patent Gmbh - Fabric for a machine for producing a fiber web.
• Publication/Filing Date: Priority date: 2015-08-13, Publication date: 2017-02-16.
• Brief Description: Another patent publication from Voith Patent GmbH, this document describes a fabric for a machine producing a fiber web. Specific details regarding its disclosure are not included in the provided text.
• Potential Anticipated Claim(s): This reference is also likely relevant to the broader field of fabrics for fibrous material web production and may address aspects of the base structure, seam, or loop characteristics.

6. EP3196357A1

• Full Citation: EP3196357A1 (en) - Ichikawa Co., Ltd. - Base fabric for a papermaking felt having seam loops and a method of producing the same.
• Publication/Filing Date: Priority date: 2016-01-20, Publication date: 2017-07-26.
• Brief Description: This patent publication describes a base fabric for a papermaking felt that includes seam loops, along with a method for its production.
• Potential Anticipated Claim(s): This reference directly addresses base fabrics with seam loops for papermaking felts, indicating high relevance to the subject matter of US11261566. It could potentially anticipate aspects of Claim 1 related to the formation of seam loops and the overall structure of the base fabric.

Special Note on EP0425523B1:

The detailed description in US11261566 explicitly references EP0425523 as proposing "the use of flat-woven webs" to produce a "two-layer laminate structure" with "seam loops" by removing CD threads at the folds, and making it endless by "interengaging the seam loops of both end sides and inserting an insertion element." This demonstrates that EP0425523B1 clearly teaches the core structural components and the method of forming a seamable fabric from flat-woven elements. Therefore, EP0425523B1 is a strong candidate for anticipating the general construction and seaming method described in the preamble of Claim 1, potentially lacking only the specific numerical ratios of LD/MDYD and loop density.