# US 4,398,643 A · Pliable weight for laboratory ware

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,398,643 A
- Document ID: US4398643A
- Status: Granted
- Kind: A
- Application number: 06/283,472
- Filed: 1981-07-15
- Granted: 1983-08-16
- Earliest claimed: 1981-07-15
- Inventors: Daniel R. Conlon
- Web page: https://patentgrep.com/patent/US4398643A

## CPC

- B01L 3/00: Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L 9/00: Supporting devices; Holding devices
- Y10S 248/91: Weighted base
- Y10T 428/218: Aperture containing
- Y10T 428/219: Edge structure
- Y10T 428/24777: Edge feature
- B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A weight for stabilizing laboratory ware and the like comprising a lead disc having a plurality of pliable extensions which are essentially symmetrically spaced, said weight being coated with a flexible cushioning material such as polyvinylchloride.

## Claims

### Claim 1

A lead disc with a central hole adapted for stabilizing a container such as a volumetric flask or a graduated cylinder, said disc having a plurality of integral symmetrically spaced flexible extensions, said extensions being capable of being bent downwardly and upwardly from the plane of said disc, and said disc being coated with a cushioning material.

### Claim 2 (depends on 1)

The lead disc of claim 1 wherein the cushioning material is polyvinylchloride.