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US 4,137,044 AGranted
Method of washing
AssigneeEconomics Laboratory, Inc.
InventorDavid M. Flower
Life of this patent
Estimating the term…
Abstract
A laundry method is disclosed including the step of laundering oil soiled fabric in lipophilic surfactant composition and subsequently laundering such fabric with a hydrophilic surfactant based detergent system.
Claims18
A multi-step process for laundering oil soiled fabric, said process comprising:
- laundering said fabric in a first aqueous bath including a lipophilic surfactant which imparts oil-solubilizing characteristics to said first aqueous bath,
- separating said fabric from said first aqueous bath,
- laundering said fabric in a second hydrophilic aqueous bath including hydrophilic detergent and,
- separating said fabric from said second hydrophilic aqueous bath.
1 more element
A multi-step process for laundering oil soiled fabric, said process comprising:
- laundering said fabric in a first aqueous bath including a lipopholic surfactant, which lipophilic surfactant has an HLB value of up to about 10.5 and which imparts oil solubilizing characteristics to said first aqueous bath,
- separating said fabric from said first aqueous bath,
- laundering said fabric in a second non-ionic hydrophilic detergent and,
- separating said fabric from said second non-ionic hydrophilic aqueous bath.
1 more element
Dependencies are inferred from the claim text.