US4683074A
Expired / Lapsed
US
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Stability and compatibility of glycosides in acid systems
Assignee: Staley Continental Inc
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Filing: 1985-04-26
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Granted: 1987-07-28
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Expires: 2005-04-26
Abstract
Abstract The glycoside surfactants are employed in combination with strong acids to provide cleaning and acidizing compositions.
Inventors
- 👤 Arshad H. Malik
- 👤 Allen D. Urfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:46
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/72; C09K8/74; C11; C11D; C11D1/00; C11D1/66; C11D1/662; C11D3/00; C11D3/16; C11D3/20; C11D3/22; C11D3/221; C11D7/00; C11D7/02; C11D7/04; C11D7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
An aqueous composition having a pH of 2 or less, the composition consisting of about 12.0 weight percent of an 85.0 weight percent aqueous solution phosphoric acid, about 3.0 weight percent oxalic acid, about 8.0 weight percent sodium nitrate, about 3.0 weight percent of an alkyl glucoside and about 74.0 weight percent water, the glucoside having a degree of polymerization of about 2.2, the alkyl glucoside having an alkyl group selected from the group consisting of nonyl, decyl, undecyl, dodecyl, tridecyl or mixtures thereof, the phosphoric acid, the oxalic acid, the sodium nitrate and alkyl glucoside dissolved in the water.
Claim 2
Dependent Claim
100 words
An aqueous composition having a pH of 2 or less, the composition consisting of about 12.0 weight percent of an 85.0 weight percent aqueous solution phosphoric acid, about 3.0 weight percent oxalic acid, about 8.0 weight percent sodium nitrate, about 3.0 weight percent of an alkyl glucoside and about 74.0 weight percent water, the glucoside having a degree of polymerization of about 2.2, the alkyl glucoside having an alkyl group selected from the group consisting of nonyl, decyl, undecyl, dodecyl, tridecyl or mixtures thereof, the phosphoric acid, the oxalic acid, the sodium nitrate and alkyl glucoside dissolved in the water.
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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) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |