Patent US4565640A successfully refreshed from Google Patents.
US4565640A
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Aqueous compositions containing cyanuric acid
Assignee: CP Kelco US Inc
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Filing: 1984-12-24
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Granted: 1986-01-21
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Expires: 2004-12-24
Abstract
Abstract Aqueous compositions containing a thickener, a hypochlorite and cyanuric acid are disclosed. They are especially useful as hydraulic fracturing fluids.
Inventors
- 👤 Chris F. Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:54
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
36 words
An aqueous controlled viscosity composition containing: (1) about 0.1% to about 1.0% xanthan gum, (2) about 0.025% to about 1.5% alkali metal or alkaline earth metal hypochlorite, and (3) about 0.005% to about 0.5% cyanuric acid.
Claim 2
Dependent Claim
36 words
An aqueous controlled viscosity composition containing: (1) about 0.1% to about 1.0% xanthan gum, (2) about 0.025% to about 1.5% alkali metal or alkaline earth metal hypochlorite, and (3) about 0.005% to about 0.5% cyanuric acid.
Claim 3
Dependent Claim
10 words
A composition of claim 1 wherein the hypochlorite is LiOCl.
Claim 4
Dependent Claim
39 words
An aqueous hydraulic fracturing compsition wherein viscosity degradation rate is controlled containing about 0.1% to about 1.0% xanthan gum, about 0.025% to about 1.5% alkali metal or alkaline earth metal hypochlorite, and about 0.005% to about 0.5% cyanuric acid.
Claim 5
Dependent Claim
39 words
An aqueous hydraulic fracturing compsition wherein viscosity degradation rate is controlled containing about 0.1% to about 1.0% xanthan gum, about 0.025% to about 1.5% alkali metal or alkaline earth metal hypochlorite, and about 0.005% to about 0.5% cyanuric acid.
References Cited (Backward Citations)
US3167510A
Cited
US3779914A
Cited
US4218327A
Cited
US4169798A
Cited
US4250044A
Cited
US4488975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |