US3694942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam chamber coatings
Assignee: Hamilton Beach Inc
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Filing: 1970-05-26
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Granted: 1972-10-03
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Expires: 1990-05-26
Abstract
Abstract A coating composition containing sodium silicate and hydrated alumina is deposited on a surface of the flash evaporation chamber in a steam ironing device. The coating is heated, most conveniently by application to an already heated surface and preferably heated to at least about 375* F, to convert it to a more insoluble form.
Inventors
- 👤 Charles H Vondracek
- 👤 Anne B Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:15
CPC Classifications
D; D06; D06F; D06F75/00; D06F75/08; D06F75/10; D06F75/14; D06F75/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
18 words
The device of claim 1 wherein the Na2O:SiO2 ratio of the sodium silicate is at least about 1:3.5.
Claim 2
Dependent Claim
19 words
The device of claim 2 wherein the coating admixture contains from about 10 to about 25 percent hydrated alumina.
Claim 3
Dependent Claim
16 words
The device of claim 1 wherein the Na2O:SiO2 ratio of the sodium silicate is about 1:3.75.
Claim 4
Dependent Claim
18 words
The device of claim 4 wherein the weight ratio of sodium silicate to hydrated alumina is about 4:1.
Claim 5
Dependent Claim
20 words
The device of claim 5 wherein said coating has been heated to a temperature of at least about 400* F.
Claim 6
Dependent Claim
12 words
The device of claim 1 wherein said surface is an aluminum surface.
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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |