Patent US4555348A successfully refreshed from Google Patents.
US4555348A
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Liquid buffer system
Assignee: Sybron Chemical Holdings Inc
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Filing: 1984-06-28
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Granted: 1985-11-26
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Expires: 2004-06-28
Abstract
Abstract Monosodium phosphate is highly soluble in water and can be used as an ingredient for a low pH liquid buffer in a concentration of about 13-40 percent by weight. Tri potassium phosphate has good solubility in water and is a suitable ingredient for a high pH liquid buffer in a concentration of about 20-50 percent by weight. By a combination of these two ingredients, a system has been developed for using liquid buffer mixes in place of solid phosphate buffers, especially for use as a direct textile bath additive.
Inventors
- 👤 James C. Moran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:52
CPC Classifications
D; D06; D06P; D06P5/00; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67366; D06L; D06L4/00; D06L4/10; D06L4/12; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; D06P3/58; D06P3/60; D06P3/66; Y; Y10; Y10S; Y10S8/00; Y10S8/929; Y10T; Y10T436/00; Y10T436/10; Y10T436/108331
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
A premixed low pH liquid buffer suitable for use as a direct textile bath additive which consists essentially of a water solution in the following percent by weight: Monosodium Phosphate: 13-40 Phosphoric Acid: 5-30 Water: Balance.
Claim 2
Dependent Claim
36 words
A premixed low pH liquid buffer suitable for use as a direct textile bath additive which consists essentially of a water solution in the following percent by weight: Monosodium Phosphate: 13-40 Phosphoric Acid: 5-30 Water: Balance.
Claim 3
Dependent Claim
36 words
A premixed high pH liquid buffer suitable for use as a direct textile bath additive which consists essentially of a water solution in the following percent by weight: Tripotassium Phosphate: 20-50 Potassium Hydroxide: 2.5-20 Water: Balance.
Claim 4
Dependent Claim
36 words
A premixed high pH liquid buffer suitable for use as a direct textile bath additive which consists essentially of a water solution in the following percent by weight: Tripotassium Phosphate: 20-50 Potassium Hydroxide: 2.5-20 Water: Balance.
Claim 5
Dependent Claim
18 words
The liquid buffer of claim 2 which contains about 0.4 to 7 percent by weight of sodium hydroxide.
Claim 6
Dependent Claim
20 words
The liquid buffer of claims 2 or 3 which contains about 4 to 10 percent by weight of borax pentahydrate.
Claim 7
Dependent Claim
28 words
The liquid buffer of claim 4 which contains about 3 to 8 percent by weight of at least one from the group consisting of monoethanolamine, diethanolamine and triethanolamine.
References Cited (Backward Citations)
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US3022926A
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US3920400A
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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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |