Patent US3947277A successfully refreshed from Google Patents.
US4035149A
Expired / Lapsed
US
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Vapor barriers for liquid conservation
Assignee: Shell USA Inc
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Filing: 1975-01-15
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Granted: 1977-07-12
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Expires: 1995-01-15
Abstract
Abstract The evaporation of volatile non-aqueous liquids is inhibited by a floating layer of expanded cereal grains optionally treated with fluorocarbons or perlite treated with fluorocarbons.
Inventors
- 👤 Paul R. Scott
- 👤 Wilmer D. Johnston
- 👤 Jerome L. Kyrish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:33
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/22; B65D90/38; B65D90/42; B01; B01J; B01J19/00; B01J19/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
A method for inhibiting evaporation of volatile non-aqueous liquids by covering the surface of said liquids with a floating layer of expanded cereal grain.
Claim 2
Independent Claim
24 words
A method for inhibiting evaporation of volatile non-aqueous liquids by covering the surface of said liquids with a floating layer of expanded cereal grain.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein said expanded cereal grain is selected from the group consisting of corn, rice, and wheat.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the expanded cereal grain is coated with a fluorocarbon.
Claim 5
Dependent Claim
11 words
The method of claim 3 wherein the fluorocarbon is a fluorosurfactant.
References Cited (Backward Citations)
US2466001A
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US2521190A
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US2764603A
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US2926988A
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US3146060A
Cited
US3446571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |