US4555348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 00:20
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)
US3129052A
Cited
US2178550A
Cited
US3022926A
Cited
US3920400A
Cited
US4051056A
Cited
US4063877A
Cited
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 |