US3676353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonflouride laundry sour containing fumaric acid
Assignee: Diversey Wyandotte Corp
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Filing: 1971-02-16
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Granted: 1972-07-11
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Expires: 1991-02-16
Abstract
Abstract The laundering of fabrics is improved by the use of fumaric acid as a laundry sour. Very satisfactory results are obtained by the use of a laundry sour containing a predominant amount of fumaric acid and a minor amount of a glassy sodium metaphosphate.
Inventors
- 👤 John D Ciko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:30
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/10; C11D7/16; C11D7/22; C11D7/26; C11D7/265
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
43 words
A composition according to claim 1 consisting essentially of about 60 to about 80 percent by weight of fumaric acid, from about 10 to about 25 percent by weight of sodium hexametaphosphate and about 5 to 10 percent by weight of citric acid.
Claim 2
Dependent Claim
21 words
A rinse water containing from about 0.02 to about 1.0 percent by weight of the laundry sour composition of claim 1.
Claim 3
Dependent Claim
39 words
In a fabric laundering process wherein the washed fabrics are rinsed in an aqueous solution of a laundry sour composition, the improvement which comprises incorporating the composition of claim 1 into the aqueous rinse solution as a laundry sour.
Claim 4
Dependent Claim
46 words
The process of claim 4 wherein the temperature of the rinse solution is held at 160 to 190* F and the fabric is treated with the rinse solution of the laundry sour for about 10 to 25 minutes, whereby reclaiming of the laundered fabric is achieved.
References Cited (Backward Citations)
US2331396A
Cited
US2379458A
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US2422066A
Cited
US2426836A
Cited
US2460680A
Cited
US1435541A
Cited
US1925843A
Cited
US2141589A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |