US4558393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture sensor
Assignee: Sharp Corp
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Filing: 1984-04-27
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Granted: 1985-12-10
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Expires: 2004-04-27
Abstract
Abstract A moisture sensor comprising a substrate, a moisture sensitive polymer film having hydroxyl groups formed on said substrate, an electrode formed on said moisture sensitive film, and a chemical modification layer disposed between said substrate and said moisture sensitive film, said chemical modification layer having chemical bonding strength to both said substrate and said moisture sensitive film thereby increasing adhesion between said substrate and said moisture sensitive film.
Inventors
- 👤 Junichi Tanaka
- 👤 Hisatoshi Furubayashi
- 👤 Masanori Watanabe
- 👤 Masaya Hijikigawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:33
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/125; G01N27/126; G01N27/121
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A moisture sensor comprising a substrate, a moisture sensitive polymer film having hydroxyl groups formed on said substrate, an electrode formed on said moisture sensitive film, and a chemical modification layer disposed between said substrate and said moisture sensitive film, said chemical modification layer having chemical bonding strength to both said substrate and said moisture sensitive film thereby increasing adhesion between said substrate and said moisture sensitive film, said chemical modification layer containing a silylating reagent having epoxy groups.
Claim 2
Dependent Claim
79 words
A moisture sensor comprising a substrate, a moisture sensitive polymer film having hydroxyl groups formed on said substrate, an electrode formed on said moisture sensitive film, and a chemical modification layer disposed between said substrate and said moisture sensitive film, said chemical modification layer having chemical bonding strength to both said substrate and said moisture sensitive film thereby increasing adhesion between said substrate and said moisture sensitive film, said chemical modification layer containing a silylating reagent having epoxy groups.
Claim 3
Dependent Claim
25 words
A moisture sensor according to claim 1, wherein said silylating reagent is at least one selected from the group consisting of the following compounds: ##STR7##
Claim 4
Dependent Claim
18 words
A moisture sensor according to claim 2, wherein said polymer forming the moisture sensitive film is polyvinyl alcohol.
Claim 5
Dependent Claim
18 words
A moisture sensor according to claim 1, wherein said polymer forming the moisture sensitive film is polyvinyl alcohol.
References Cited (Backward Citations)
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |