{"id":113609,"date":"2026-05-15T14:56:45","date_gmt":"2026-05-15T09:26:45","guid":{"rendered":"https:\/\/greyb.com\/?post_type=case_study&p=113609"},"modified":"2026-05-15T15:03:08","modified_gmt":"2026-05-15T09:33:08","slug":"invalidating-alkali-free-glass-composition","status":"publish","type":"case_study","link":"https:\/\/greyb.com\/case-studies\/invalidating-alkali-free-glass-composition\/","title":{"rendered":"Invalidating Alkali-Free Glass Composition Claims in a High-Stakes Materials Science Lawsuit"},"content":{"rendered":"\n

Value Delivered<\/h2>\n\n\n\n

GreyB identified strong primary prior art and combined it with a secondary reference. This helped invalidate a tough composition claim in a materials science patent and supported the defense of prominent display manufacturers in a lawsuit.<\/p>\n\n\n\n

The work went beyond locating references. GreyB used a structured approach to convert mass% disclosures into mol% across nearly 500 closely relevant documents. The team built a custom Excel calculator for this conversion.<\/p>\n\n\n\n

This gave the attorneys a defensible, like-for-like mapping of constituents against the claimed ranges. It helped them argue that the claimed glass composition was not inventive. The strategically chosen SrO concentration was shown to be a routine combination, supported by well-known functional teachings in the art.<\/p>\n\n\n

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Problem Solved<\/h2>\n\n\n\n

The client faced a patent dispute involving an alkali-free glass composition claim. The claim was restricted by mole-percent ranges of nearly ten constituents, including SiO\u2082, Al\u2082O\u2083, B\u2082O\u2083, MgO, CaO, SrO, BaO, and others.<\/p>\n\n\n\n

The research goal was to identify prior art that disclosed this exact compositional fingerprint before the cut-off date. The challenge had two parts.<\/p>\n\n\n\n

First, most patented and non-patented literature reported compositions in mass percentage instead of mol%. This made direct comparison impossible without conversion.<\/p>\n\n\n\n

Second, even when the constituents were disclosed, the ranges rarely aligned across all ten elements at the same time. A comprehensive review yielded close candidates. However, none matched every constituent. The claimed SrO range remained a key gap.<\/p>\n\n\n\n

Solutions Offered<\/h2>\n\n\n\n

The turning point came when the team stopped relying on manual conversions and AI tools. Manual conversions were slow and error-prone. AI tools were faster but unreliable for snippet-level inputs.<\/p>\n\n\n\n

Instead, GreyB built a dedicated mass%-to-mol% conversion calculator in Excel. The calculator automatically flagged values that fell within the claimed ranges.<\/p>\n\n\n\n

Using this calculator, the team streamlined the review of nearly 500 closely relevant documents. This revealed a near-perfect primary prior art match for most of the composition.<\/p>\n\n\n\n

To bridge the remaining SrO gap, the team shifted from range-matching to functionality-matching. They examined why the patent restricted SrO to \u2264 2.0 mol%. The reason was to control density, modulus, and strain point.<\/p>\n\n\n\n

The team then located a secondary reference that disclosed the same SrO concentration. This reference tied the concentration to the same desirable properties for high-quality alkali-free glass.<\/p>\n\n\n\n

Together, the two references established a clear motivation for a person skilled in the art to combine them. This completed the invalidity argument and helped the client defend the lawsuit.<\/p>\n\n\n\n

Get the full case study to discover how GreyB invalidated composition claims in a high-stakes materials science lawsuit.<\/strong><\/p>\n\n\n\t\t

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