US4537706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid detergents containing boric acid to stabilize enzymes
Assignee: Procter and Gamble Co
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Filing: 1984-05-14
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Granted: 1985-08-27
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Expires: 2004-05-14
Abstract
Abstract Heavy-duty liquid detergents containing anionic surfactant, fatty acid, builder, proteolytic or amylolytic enzyme, boric acid or a boron compound capable of forming boric acid in the composition, and calcium ion are disclosed. Boric acid provides improved enzyme stability in the compositions.
Inventors
- 👤 Roland G. Severson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:33
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38663
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
107 words
A heavy-duty liquid detergent composition comprising, by weight: (a) from about 10% to about 50% of an anionic synthetic surfactant; (b) from about 3% to about 30% of a C 10 -C 22 fatty acid; (c) from about 2% to about 15% of a water-soluble detergency builder; (d) from about 0.01% to about 5% of a proteolytic or amylolytic enzyme; (e) from about 0.25% to about 10% of boric acid or a boron compound capable of forming boric acid in the composition; (f) from about 1 to about 30 millimoles of calcium ion per liter of composition; and (g) from about 20% to about 80% of water.
Claim 2
Dependent Claim
107 words
A heavy-duty liquid detergent composition comprising, by weight: (a) from about 10% to about 50% of an anionic synthetic surfactant; (b) from about 3% to about 30% of a C 10 -C 22 fatty acid; (c) from about 2% to about 15% of a water-soluble detergency builder; (d) from about 0.01% to about 5% of a proteolytic or amylolytic enzyme; (e) from about 0.25% to about 10% of boric acid or a boron compound capable of forming boric acid in the composition; (f) from about 1 to about 30 millimoles of calcium ion per liter of composition; and (g) from about 20% to about 80% of water.
Claim 3
Dependent Claim
18 words
A composition according to claim 1 comprising from about 15% to about 25% of the anionic synthetic surfactant.
Claim 4
Dependent Claim
22 words
A composition according to claim 2 comprising from about 1% to about 5% of an unethoxylated C 10 -C 18 alkyl sulfate.
Claim 5
Dependent Claim
27 words
A composition according to claim 2 comprising from about 8% to about 15% of a saturated fatty acid containing from about 10 to about 14 carbon atoms.
Claim 6
Dependent Claim
19 words
A composition according to claim 1 comprising from about 3% to about 10% of builder, which is a polycarboxylate.
Claim 7
Dependent Claim
12 words
A composition according to claim 5 wherein the polycarboxylate builder comprises citrate.
Claim 8
Dependent Claim
31 words
A composition according to claim 6 comprising from about 0.1% to about 1% of a water-soluble salt of ethylenediamine tetramethylenephosphonic acid, diethylenetriamine pentamethylenephosphonic acid, ethylenediamine tetraacetic acid, or diethylenetriamine pentaacetic acid.
Claim 9
Dependent Claim
16 words
A composition according to claim 7 comprising from about 0.75% to about 3% of boric acid.
Claim 10
Dependent Claim
21 words
A composition according to claim 8 comprising from about 5 to about 15 millimoles of calcium ion per liter of composition.
Claim 11
Dependent Claim
73 words
A composition according to claim 9 comprising from about 15% to about 25% anionic surfactant, which is a mixture comprising C 10 -C 18 alkyl sulfate, C 10 -C 18 alkyl ethoxy sulfate containing an average of up to about 4 moles of ethylene oxide per mole of alkyl sulfate, and C 11 -C 13 linear alkylbenzene sulfonate, with about 1% to about 5% being an unethoxylated C 10 -C 18 alkyl sulfate.
Claim 12
Dependent Claim
27 words
A composition according to claim 10 comprising from about 8% to about 15% of a saturated fatty acid containing from about 10 to about 14 carbon atoms.
Claim 13
Dependent Claim
31 words
A composition according to claim 1 further comprising from about 1% to about 15% of a polyol containing from 2 to 6 carbon atoms and from 2 to 6 hydroxy groups.
Claim 14
Dependent Claim
18 words
A composition according to claim 11 further comprising from about 2% to about 7% of 1,2 propane diol.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |