US4064065A
Expired / Lapsed
US
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Aqueous solutions of alkali metal hydroxides
Assignee: ChampionX LLC
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Filing: 1976-06-10
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Granted: 1977-12-20
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Expires: 1996-06-10
Abstract
Abstract An aqueous solution of alkali metal hydroxides which is composed of: A. a 50% by weight aqueous solution of sodium hydroxide, and B. a 45% by weight aqueous solution of potassium hydroxide, With the weight ratio of A to B being 2:1.
Inventors
- 👤 James W. Stoll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:56
CPC Classifications
C; C01; C01D; C01D1/00; C01D1/04; C09; C09K; C09K3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
An aqueous solution of alkali metal hydroxides comprising: A. a 50% by weight aqueous solution of sodium hydroxide, and B. a 45% by weight aqueous solution of potassium hydroxide, With the weight ratio of A to B being 2:1, said aqueous solution of the alkali metal hydroxides having a freezing point of about 0° F.
Claim 2
Dependent Claim
55 words
An aqueous solution of alkali metal hydroxides comprising: A. a 50% by weight aqueous solution of sodium hydroxide, and B. a 45% by weight aqueous solution of potassium hydroxide, With the weight ratio of A to B being 2:1, said aqueous solution of the alkali metal hydroxides having a freezing point of about 0° F.
References Cited (Backward Citations)
US2464019A
Cited
US2470214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |