Mapping the patent landscape of innovations in eggshell waste applications

Abstract

The objective of this article is to analyze patents related to the reuse of solid waste from chicken eggshells. The analysis is based on technological prospection in patent databases. The study focuses on the use of eggshells as raw material or as components in industrial processes. This approach is aligned with the principles of circular economy. To complement the technological prospection, a review of national and international literature was conducted. The goal is to identify innovative technologies and patented processes that support sustainable waste management. The analysis considers environmental, social, and economic dimensions. Findings indicate that eggshell waste remains undervalued. Its disposal continues to pose environmental challenges in many countries. However, between 2000 and 2022, the number of patents related to its reuse increased by 643%. Most filings (91%) are concentrated in Asian countries, which are among the largest producers of chicken eggs. China stands out as the leading applicant. This growth in patent activity reflects the increasing interest of research and development centers in repurposing eggshell waste. The material is gaining recognition as a viable input for new products, especially in agribusiness.