Patent US4537707A successfully refreshed from Google Patents.
US4537707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid detergents containing boric acid and formate 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 enzyme, boric acid or a boron compound capable of forming boric acid in the composition, formate, and calcium ion are disclosed. The combination of boric acid and formate provides improved protease stability in the compositions.
Inventors
- 👤 Roland G. Severson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:24
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38663
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
116 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 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 0.05% to about 5% of a water-soluble formate; (g) from about 1 to about 30 millimoles of calcium ion per liter of composition; and (h) from about 20% to about 80% of water.
Claim 2
Dependent Claim
116 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 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 0.05% to about 5% of a water-soluble formate; (g) from about 1 to about 30 millimoles of calcium ion per liter of composition; and (h) 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
16 words
A composition according to claim 8 comprising from about 0.4% to about 1.5% of the formate.
Claim 11
Dependent Claim
21 words
A composition according to claim 9 comprising from about 5 to about 15 millimoles of calcium ion per liter of composition.
Claim 12
Dependent Claim
73 words
A composition according to claim 10 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 13
Dependent Claim
26 words
A composition according to claim 11 comprising from about 8% to about 15% of a saturated fatty acid containing from about 10 to 14 carbon atoms.
Claim 14
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 15
Dependent Claim
18 words
A composition according to claim 12 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 |