Patent US3620820A successfully refreshed from Google Patents.
US3620820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiwetting methods and compositions
Assignee: Chevron USA Inc
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Filing: 1966-08-01
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Granted: 1971-11-16
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Expires: 1986-08-01
Abstract
Abstract Hydroxylic surfaces are rendered resistant to wetting and fogging for long periods of time by the application to such surfaces of a minor amount of a lower trialkoxy compound of silicone.
Inventors
- 👤 Patrick Henry Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:09
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C03; C03C; C03C17/00; C03C17/28; C03C17/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
12 words
Method as in claim 1 wherein said surface is a siliceous surface.
Claim 2
Dependent Claim
9 words
Method of claim 2 wherein said surface is glass.
Claim 3
Dependent Claim
9 words
Method of claim 1 wherein said surface is wood.
Claim 4
Dependent Claim
27 words
Method of claim 1 wherein said application is by means of an aerosol spray and in which said compounds are dissolved in a volatile inert carrier solvent.
Claim 5
Dependent Claim
14 words
The method, as in claim 1, further characterized in that said compound is HCF2(CF2)9CH2OCH2CH(OH)CH2OCH2CH2CH2Si(OCH3)3
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |