Patent US3776775A successfully refreshed from Google Patents.
US3776775A
Expired / Lapsed
US
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Removal of ice by a self-heating mixture
Assignee: Aeroseal Corp
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Filing: 1971-12-14
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Granted: 1973-12-04
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Expires: 1991-12-14
Abstract
Abstract Ice is removed from a windshield or the like by spraying onto that surface an at least partially reacted mixture in droplet form of two dissimilar chemical compositions which react chemically to generate heat. The two compositions are stored in separate compartments of a dispensing container, preferably of the aerosol type, and when the dispensing valve is opened the two compositions are mixed in predetermined proportions and expelled from the container. Means may be provided in the container to control the relative flow rates of the two compositions thereby to determine the proportions in which they are mixed. Means may be provided in the valve to retain the mixed compositions in the container for a period of time sufficient to provide for a desired degree of reaction between them.
Inventors
- 👤 S Lazarus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:26
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/18; C09K3/185; F; F24; F24V; F24V30/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
18 words
The method of claim 1, in which said mixture, when sprayed in step (C), is only incompletely reacted.
Claim 2
Dependent Claim
22 words
The method of claim 1, in which said mixture, when sprayed in step (C), is at a temperature below its boiling point.
Claim 3
Dependent Claim
26 words
The method of claim 1, in which said components of composition (b) are present in the following proportions by weight: AmmoniaAbout 12% WaterAbout 52% MethanolAbout 35%
Claim 4
Dependent Claim
22 words
The method of claim 1, in which said compositions (a) and (b) are present in relative proportions by weight of about 1:4.
Claim 5
Dependent Claim
22 words
The method of claim 4, in which said compositions (a) and (b) are present in relative proportions by weight of about 1:4.
Claim 6
Dependent Claim
22 words
The method of claim 1, in which steps (A), (B) and (C) are carried out by means of a pressurized aerosol dispenser.
Claim 7
Dependent Claim
21 words
The method of claim 1, in which composition (a) consists essentially of acetic anhydride and composition (b) further comprises a propellant.
Claim 8
Dependent Claim
21 words
The method of claim 1, in which composition (a) consists essentially of acetic acid and composition (b) further comprises a propellant.
Claim 9
Dependent Claim
20 words
The method of claim 8, wherein said propellant is present in a concentration of from about 1-6 percent, by weight.
Claim 10
Dependent Claim
20 words
The method of claim 9, wherein said propellant is present in a concentration of from about 1-6 percent, by weight.
Claim 11
Dependent Claim
28 words
The method of claim 10, in which said components of composition (b) are present in the following proportions by weight: AmmoniaAbout 12% WaterAbout 52% MethanolAbout 35% PropellantAbout 1%
Claim 12
Dependent Claim
28 words
The method of claim 11, in which said components of composition (b) are present in the following proportions by weight: AmmoniaAbout 12% WaterAbout 52% MethanolAbout 35% PropellantAbout 1%
Claim 13
Dependent Claim
26 words
The method of claim 10, in which said components of composition (b) are present in the following proportions by weight: AmmoniaAbout 12% WaterAbout 52% MethanolAbout 35%
Claim 14
Dependent Claim
25 words
The method of claim 11, in which said components of composition (b) are present in the following proPortions by weight: AmmoniaAbout 12% WaterAbout52% MethanolAbout 35%
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |