Patent US3413146A successfully refreshed from Google Patents.
US4920451A
Expired / Lapsed
US
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Moisture-sensitive element
Assignee: Azbil Corp
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Filing: 1989-05-18
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Granted: 1990-04-24
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Expires: 2009-05-18
Abstract
Abstract A moisture-sensitive element includes a moisture-sensitive film consisting of a polymer prepared by polymerizing a methacrylate monomer not having a hydroxyl group. A humidity detector using the moisture-sensitive element is also disclosed.
Inventors
- 👤 Yoshiro Sakai
- 👤 Yoshihiko Sadaoka
- 👤 Takaai Kuroiwa
- 👤 Tooru Abe
- 👤 Tetsuya Miyagishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/223; G01N27/225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
22 words
A moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by polymerizing a methacrylate monomer not having a hydroxyl group.
Claim 2
Dependent Claim
22 words
A moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by polymerizing a methacrylate monomer not having a hydroxyl group.
Claim 3
Dependent Claim
22 words
An element according to claim 1, wherein said moisture-sensitive film is arranged between first and second electrodes arranged on an insulating substrate.
Claim 4
Dependent Claim
31 words
An element according to claim 2, wherein said first electrode is an upper electrode and said second electrode is a lower electrode, said upper and lower electrodes sandwiching said moisture-sensitive film.
Claim 5
Dependent Claim
14 words
An element according to claim 2, wherein lead wires are connected to said electrodes.
Claim 6
Dependent Claim
113 words
An element according to claim 2, wherein each of said first and second electrodes has an electrode terminal, and further comprising: an external lead wire, connected to at least one of said electrode terminals, and having substantially U-shaped clip pieces for clamping said electrode terminal and said insulating substrate; a conductive adhesive portion arranged on a contact portion between one of said clip pieces and said electrode terminal to adhere the one clip piece and said electrode terminal; and a fixing adhesive portion arranged at a contact portion between a rear surface of said insulating substrate and the other clip piece to adhere and fix said rear surface and the other clip piece.
Claim 7
Dependent Claim
32 words
A moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by copolymerizing a methacrylate monomer not having a hydroxyl group and a crosslinking agent having a plurality of vinyl groups.
Claim 8
Dependent Claim
32 words
A moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by copolymerizing a methacrylate monomer not having a hydroxyl group and a crosslinking agent having a plurality of vinyl groups.
Claim 9
Dependent Claim
54 words
A humidity detector, wherein at least one opening portion is formed in a case housing a moisture-sensitive element, and a hydrophobic filter is arranged on said opening portion via a bonding agent, said moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by polymerizing a methacrylate monomer not having a hydroxyl group.
Claim 10
Dependent Claim
54 words
A humidity detector, wherein at least one opening portion is formed in a case housing a moisture-sensitive element, and a hydrophobic filter is arranged on said opening portion via a bonding agent, said moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by polymerizing a methacrylate monomer not having a hydroxyl group.
Claim 11
Dependent Claim
64 words
A humidity detector, wherein at least one opening portion is formed in a case housing a moisture-sensitive element, and a hydrophobic filter is arranged on said opening portion via a bonding agent, said moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by copolymerizing a methacrylate monomer not having a hydroxyl group and a crosslinking agent having a plurality of vinyl groups.
Claim 12
Dependent Claim
64 words
A humidity detector, wherein at least one opening portion is formed in a case housing a moisture-sensitive element, and a hydrophobic filter is arranged on said opening portion via a bonding agent, said moisture-sensitive element comprising a moisture-sensitive film consisting of a polymer prepared by copolymerizing a methacrylate monomer not having a hydroxyl group and a crosslinking agent having a plurality of vinyl groups.
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) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |