US4654157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thawing agent
Assignee: Individual
•
Filing: 1985-10-30
•
Granted: 1987-03-31
•
Expires: 2005-10-30
Abstract
Abstract A thawing agent comprises as active ingredients a combination of magnesium chloride, magnesium sulfate and calcium chloride; magnesium chloride and magnesium sulfate; or magnesium chloride and calcium chloride which is substantially free from sodium chloride and whose ratio is within the area of rising isothermal lines of 3° C. or more in the attached FIG. 1.
Inventors
- 👤 Hosaku Fukunaga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A solid thawing agent which comprises a binary or ternary mixture of magnesium chloride and a component selected from the group consisting of calcium chloride, magnesium sulfate and mixtures thereof, said agent being substantially free from sodium chloride, and the respective salts being admixed in proportions within the area of rising isothermal lines of 3.5° C. or more in FIG. 1, and within the areas of heat generation efficiencies of at least 80% shown in the diagonally lined areas and areas D, E and F of FIG. 2, of the drawings.
Claim 2
Dependent Claim
91 words
A solid thawing agent which comprises a binary or ternary mixture of magnesium chloride and a component selected from the group consisting of calcium chloride, magnesium sulfate and mixtures thereof, said agent being substantially free from sodium chloride, and the respective salts being admixed in proportions within the area of rising isothermal lines of 3.5° C. or more in FIG. 1, and within the areas of heat generation efficiencies of at least 80% shown in the diagonally lined areas and areas D, E and F of FIG. 2, of the drawings.
Claim 3
Dependent Claim
36 words
A thawing agent according to claim 1 which contains 20-65 w/w % of magnesium chloride, 20-50 w/w % of magnesium sulfate and 0-50 w/w % of calcium chloride on the total amount of these active ingredients.
Claim 4
Dependent Claim
28 words
A thawing agent according to claim 1 which further contains an auxiliary ingredient selected from the group consisting of an alkali metal phosphate, potassium chloride, and mixtures thereof.
Claim 5
Dependent Claim
15 words
A thawing agent according to claim 1 which is in a granular or tablet form.
Claim 6
Dependent Claim
12 words
A thawing agent according to claim 1 which is in flaky form.
Claim 7
Dependent Claim
10 words
A thawing agent according to claim 1 which is colored.
Claim 8
Dependent Claim
33 words
A thawing agent according to claim 1, which contains 30-50 w/w % magnesium chloride, 20-50 w/w % magnesium sulfate and 20-40 w/w % calcium chloride, on the total amount of these active ingredients.
Claim 9
Dependent Claim
38 words
A thawing agent according to claim 1, in which the salts are admixed in proportions within the areas of heat generation efficiencies of at least 80% shown in the diagonally lined areas of FIG. 2 of the drawing.
Claim 10
Dependent Claim
18 words
A thawing agent according to claim 1, in which each of said salts is substantially free of water.
References Cited (Backward Citations)
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Cited
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US4000079A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |