# Standardizing Sizes for Adult Disposable Underwear

> A system for organizing adult diapers into specific size groups based on precise mathematical ratios of length, waist, and hip measurements to ensure consistent fit across a product line.

- **Patent:** US 12156789
- **Original title:** Length-to-waist and hip-to-side silhouettes of adult disposable absorbent articles and arrays
- **Owner:** Procter and Gamble Co
- **Granted:** 2024
- **Status:** Active
- **Times cited:** 0
- **Field:** consumer_electronics, mechanical

## What it does

This patent defines a method for grouping adult disposable absorbent articles (like adult underwear) into specific size arrays based on calculated ratios. It uses a Product Length-to-Waist Silhouette—a specific ratio of the product's total length to its waist width—to ensure that as sizes increase or decrease, the proportions of the garment remain consistent for the user. By mandating that these ratios fall within specific ranges (e.g., 0.64 to 1.08), the patent ensures that a consumer moving from one size to another experiences a predictable change in fit. The claims also specify physical construction details, such as the use of elastic strands in the front and back belts and the inclusion of absorbent gelling materials within the core.

## What it does NOT cover

- Does not cover individual absorbent articles that are sold outside of a multi-size array package system.
- Does not cover products that do not utilize the specific Length-to-Waist Silhouette ratio ranges defined in the claims.
- Does not cover absorbent products that lack front and back belt structures joined at side seams.
- Does not cover non-disposable or reusable absorbent undergarments.

## The clever bit

The innovation lies in treating 'fit' as a geometric ratio rather than just absolute dimensions, allowing manufacturers to maintain a consistent 'silhouette' across different sizes so the product behaves the same way on the body regardless of the wearer's dimensions.

## Real-world examples

1. Pampers or Always Discreet adult underwear product lines
2. Multi-pack retail displays of adult incontinence briefs

## Why it matters

Adult incontinence products often suffer from inconsistent sizing, where different sizes feel like entirely different products rather than scaled versions of the same design. This patent provides a mathematical framework for manufacturers to standardize their product lines, which reduces consumer confusion and improves the likelihood of finding a comfortable, leak-proof fit. It represents an effort to bring the same level of standardized sizing found in traditional apparel to the disposable hygiene market.

## Frequently asked questions

### What does Standardizing Sizes for Adult Disposable Underwear cover?

A system for organizing adult diapers into specific size groups based on precise mathematical ratios of length, waist, and hip measurements to ensure consistent fit across a product line.

### Who owns patent US 12156789?

Procter and Gamble Co owns this patent, granted in 2024.

### When does this patent expire?

This patent is expected to expire on December 3, 2044, when the invention enters the public domain.

### What problem does this patent solve?

Adult incontinence products often suffer from inconsistent sizing, where different sizes feel like entirely different products rather than scaled versions of the same design. This patent provides a mathematical framework for manufacturers to standardize their product lines, which reduces consumer confusion and improves the likelihood of finding a comfortable, leak-proof fit. It represents an effort to bring the same level of standardized sizing found in traditional apparel to the disposable hygiene market.

### What does this patent NOT cover?

Does not cover individual absorbent articles that are sold outside of a multi-size array package system.

**Full plain-English explainer:** https://patentbrief.org/patent/us/12156789/crew-dragon

**Original patent:** https://patents.google.com/patent/US12156789

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._