IP Library › Granted Patent US 12,655,366
Granted Patent B2
US 12,655,366 · App. 16/823,645 · Granted Jun 16, 2026

Process of laundering fabrics

Inventors: Mark Robert Sivik (Mason, OH); Sol Melissa Escobar (Mason, OH); Sarah Ann Delaney (Hebron, KY); Frank William Denome (Cincinnati, OH); Mark William Hamersky (Hamilton, OH)
Assignee: The Procter & Gamble Company
C11D3/2086C11D17/042C11D2111/12
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Quick Facts
Patent No.
US 12,655,366
App. No.
16/823,645
Granted
Jun 16, 2026
Kind
B2
Abstract

The present invention relates to a process for laundering fabrics using a detergent composition and a fibrous water-soluble unit dose in the rinse cycle.

Claims (30)

1 . A process of laundering fabrics, comprising the steps of;

a. combining fabrics with a wash liquor, wherein the wash liquor comprises a detergent;

b. washing the fabrics in the wash liquor using an automatic wash operation, a manual wash operation, or a mixture thereof;

c. separating the fabrics and the wash liquor from one another;

d. combining the fabrics with a rinse liquor in a rinse cycle, wherein the rinse liquor comprises a concentrated acid delivery source in the form of a fibrous water-soluble unit dose wherein the fibrous water soluble unit dose comprises from about 50% to about 70% by weight of the fibrous water soluble unit dose of an active agent comprising an acid in the form of particles; and

e. drying the fabrics.

2 . The process of laundering fabrics according to claim 1 ,

a. wherein the fabrics are washed in the wash liquor at a temperature of between 10° C. and 60° C.; and

b. wherein the wash operation in step b takes between 5 minutes and 60 minutes.

3 . The process of laundering fabrics according to claim 1 , wherein the rinse cycle further comprises a low pH rinse product.

4 . The process of laundering fabrics according to claim 1 , wherein the detergent composition is a liquid and wherein the liquid detergent composition has a pH between 6.5 and 8.9, wherein the pH of the liquid laundry detergent composition is measured as a neat pH.

5 . The process of laundering fabrics according to claim 1 , wherein the detergent composition is a liquid and wherein the liquid detergent composition has a pH between 2 and 6, wherein the pH of the liquid detergent composition is measured as a neat pH.

6 . The process of laundering fabrics according to claim 1 , wherein the comprises acetic acid, adipic acid, aspartic acid, carboxymethyloxymalonic acid, carboxymethyloxysuccinic acid, citric acid, formic acid, glutaric acid, gluconic acid, hydroxyethyliminodiacetic acid, iminodiacetic acid, lactic acid, maleic acid, malic acid, malonic acid, oxydiacetic acid, oxydisuccinic acid, succinic acid, sulfamic acid, tartaric acid, tartaric-disuccinic acid, tartaric-monosuccinic acid,; their salts; or a combination thereof.

7 . The process of laundering fabrics according to claim 6 , wherein the acid is citric acid and sodium citrate.

8 . The process of laundering fabrics according to claim 1 , wherein the water-soluble unit dose comprises a coating comprising citric acid.

9 . The process of laundering fabrics according to claim 1 , wherein the fibrous water-soluble fibrous unit dose comprises a bittering agent on an outer surface.

10 . The process of laundering fabrics according to claim 1 , wherein the water-soluble unit dose comprises a soluble fibrous structure, wherein the soluble fibrous structure forms a pouch which encases the active.

11 . The process of laundering fabrics according to claim 10 , wherein the active is commingled with the soluble fibrous structure to form a coform structure.

12 . The process of laundering fabrics according to claim 10 , wherein the soluble fibrous structure comprises fibrous elements having a surfactant therein.

13 . The process of laundering fabrics according to claim 1 , wherein the composition of the fibrous water-soluble unit dose comprises of 50% or greater of bio-based materials.

14 . The process of laundering fabrics according to claim 10 , wherein the fibrous structure comprises fibrous elements comprising starch.

15 . The process of laundering fabrics according to claim 1 , wherein the process of washing the fabrics further comprises reducing the pH of the rinse liquor to a pH between 3 and 5.

16 . A process of laundering fabrics, comprising the steps of;

a. combining fabrics with a wash liquor, wherein the wash liquor comprises a detergent;

b. washing the fabrics in the wash liquor using an automatic wash operation, a manual wash operation, or a mixture thereof, wherein the process of washing the fabrics comprises a rinse cycle comprising a rinse liquor, wherein the rinse liquor comprises a concentrated acid delivery source in the form of a fibrous water-soluble unit dose, wherein the fibrous water soluble unit dose comprises from about 50% to about 70% by weight of the fibrous water soluble unit dose of an active agent comprising an acid; and

wherein the process of washing the fabrics further comprises reducing the pH of the rinse liquor to a pH between 3 and 5;

c. separating the fabrics and the wash liquor from one another; and

d. drying the fabrics.

17 . The process of laundering fabrics according to claim 16 , wherein the comprises acetic acid, adipic acid, aspartic acid, carboxymethyloxymalonic acid, carboxymethyloxysuccinic acid, citric acid, formic acid, glutaric acid, gluconic acid, hydroxyethyliminodiacetic acid, iminodiacetic acid, lactic acid, maleic acid, malic acid, malonic acid, oxydiacetic acid, oxydisuccinic acid, succinic acid, sulfamic acid, tartaric acid, tartaric-disuccinic acid, tartaric-monosuccinic acid,; their salts; or a combination thereof.

18 . The process of laundering fabrics according to claim 17 , wherein the acid is citric acid and sodium citrate.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 23, 2020
From: SIVIK, MARK ROBERT; ESCOBAR, SOL MELISSA; DELANEY, SARAH ANN; DENOME, FRANK WILLIAM; HAMERSKY, MARK WILLIAM
To: THE PROCTER AND GAMBLE COMPANY
Reel/Frame 053007/0518 →
Continuity (2)
Provisional Application 62820591 · Mar 19, 2019
Related Publication 20200299622A1 · Sep 24, 2020
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