IP Library Granted Patent US 8,821,363
Granted Patent B1
US 8,821,363 · App. 13/670,562 · Granted Sep 2, 2014

System for solidification of liquid medical waste

Inventor: Quint Barefoot (McLeansville, NC)
A62D3/33B09B3/00B01J20/28016A61L2/23
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 8,821,363
App. No.
13/670,562
Granted
Sep 2, 2014
Kind
B1
Abstract

The invention includes a system for solidification of liquid medical waste for use in connection with a vessel configured to receive an aqueous liquid to be solidified. The system includes an absorbent composition including a plurality of surface cross-linked superabsorbent particles and a plurality of second particles. Additionally, a soluble packet may be included so that the absorbent composition is released upon dissolution of the packet. The invention also includes a liquid solidification system for reducing gel block and a method of solidifying liquid medical waste.

Claims (14)

1. A system for solidification of liquid medical waste comprising:

a medical waste collection container having a liquid supply line to supply liquid medical waste to the medical waste collection container under the influence of a suction,

an absorbent composition sized and shaped to be placed within the medical waste collection container comprising,

a population of superabsorbent polymer particles that are cross-linked internally and on their surfaces, and

a granular chlorine sanitizer mixed with the particles, and

a packet at least partially soluble in an aqueous liquid to be solidified so that the absorbent composition is contained inside the packet and is released upon dissolution of the packet.

2. The system for solidification as claimed in claim 1 further comprising second particles that are electrostatically attracted to the surfaces of the superabsorbent polymer particles.

3. The system for solidification as claimed in claim 2 wherein the second particles are inorganic non-soluble particles.

4. The system for solidification as claimed in claim 2 wherein the second particles are fumed silica.

5. The liquid solidification system as claimed in claim 1 , wherein the absorbent composition comprises:

a liquid solidifier of at least 20 grams of the superabsorbent polymer particles per 1000 cc of fluid to be solidified.

6. The system as claimed in claim 1 , further including by weight/weight % ratio of about 5% to 15% of sanitizer to superabsorbent polymer particles.

7. The system as claimed in claim 6 , wherein the packet is made of dissolvable polyvinyl alcohol.

8. The liquid solidification system as claimed in claim 6 , further including an additional by weight/weight % ratio of about 10% to 20% of superabsorbent polymer particles added to the liquid solidifier.

Assignments (4)
RELEASE OF SECURITY INTEREST IN PATENT COLLATERAL, RECORDED ON NOVEMBER 17, 2023 AT REEL 065597, FRAME 0771 Recorded Apr 22, 2025
From: ANTARES CAPITAL LP, AS COLLATERAL AGENT
To: CHASE CORPORATION; NEPTCO INCORPORATED; NUCERA SOLUTIONS LLC; STEWART SUPERABSORBENTS, LLC
Reel/Frame 070906/0753 →
GRANT OF SECURITY INTEREST IN PATENT RIGHTS Recorded Apr 22, 2025
From: CHASE CORPORATION; NEPTCO INCORPORATED; NUCERA SOLUTIONS LLC; STEWART SUPERABSORBENTS, LLC
To: MORGAN STANLEY SENIOR FUNDING, INC., AS COLLATERAL AGENT
Reel/Frame 070909/0765 →
SECURITY INTEREST Recorded Nov 17, 2023
From: CHASE CORPORATION; NEPTCO INCORPORATED; NUCERA SOLUTIONS LLC; STEWART SUPERABSORBENTS, LLC
To: ANTARES CAPITAL LP, AS COLLATERAL AGENT
Reel/Frame 065597/0771 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 20, 2017
From: BAREFOOT, QUINT
To: STEWART SUPERABSORBENTS, LLC
Reel/Frame 044178/0378 →
Continuity (1)
Continuation 12752688 · Apr 1, 2010