US3645802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of maintaining constant water volume in a molten salt solution
Assignee: Multifastener Corp
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Filing: 1969-10-27
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Granted: 1972-02-29
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Expires: 1989-10-27
Abstract
Abstract A method of maintaining the percentage of water in a molten salt solution substantially constant. The method includes the step adding water to a body of molten salt in response to a rise in the electrical resistivity of the solution beyond a certain predetermined value, and continuing the addition until the electrical resistivity falls back to the predetermined value.
Inventors
- 👤 William R Keough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:07
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/56; C21D1/607; C21D1/62; C21D1/63
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
The method defined in claim 1, wherein the salt composition of the quench bath is a nitrate-nitrite mixture containing a relatively small volume of water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |