US3864659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Humidity sensor
Assignee: AGC Inc
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Filing: 1973-07-25
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Granted: 1975-02-04
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Expires: 1993-07-25
Abstract
Abstract Humidity sensors are formed by spatially arranging a pair of electrodes in approximately close parallel juxtaposition onto a glass surface, so that a sensing gap is formed between said electrodes, wherein said electrodes and said sensing gap are covered by a membrane of a cured amino group containing organosilicon compound.
Inventors
- 👤 Shigemasa Furuuchi
- 👤 Hironiri Ohta
- 👤 Koichi Sugaya
- 👤 Tadatoshi Kamimori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:15
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/121
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
In a humidity sensor which comprises a pair of electrodes which are arranged parallel to one another with a suitable gap therebetween and which are fitted on the surface of a glass plate to automatically detect the formation of condensed moisture within the gap between the electrodes, the improvement which comprises the application of a membrane over the electrodes of said humidity sensor and the gap between the electrodes wherein said membrane is prepared by curing an amino group containing organosilicon compound, wherein said amino group containing organosilicon compound is an amino-organofunctional alkoxysilane.
Claim 2
Dependent Claim
93 words
In a humidity sensor which comprises a pair of electrodes which are arranged parallel to one another with a suitable gap therebetween and which are fitted on the surface of a glass plate to automatically detect the formation of condensed moisture within the gap between the electrodes, the improvement which comprises the application of a membrane over the electrodes of said humidity sensor and the gap between the electrodes wherein said membrane is prepared by curing an amino group containing organosilicon compound, wherein said amino group containing organosilicon compound is an amino-organofunctional alkoxysilane.
Claim 3
Dependent Claim
34 words
The humidity sensor of claim 1, wherein said humidity sensor membrane is prepared by curing a mixture of an amino group containing organosilicon compound and a reactive compound which reacts with said organosilicon compound.
Claim 4
Dependent Claim
35 words
The humidity sensor of claim 2, wherein said reactive compound contains a reactive double bond which undergoes polymerization, and wherein said reactive compound also reacts with the alkoxyl or amino group of said organosilicon compound.
Claim 5
Dependent Claim
32 words
The humidity sensor of claim 1, wherein said amino-organofunctional alkoxysilane is selected from the group consisting of: NH2(CH2)2NH(CH2)3Si(OCH3)3, NH2(CH2)2NH(CH2)2Si(CH3)(OCH3)2, NH2(CH2)3Si(OC2H5)3, (CH3O)2CH3SiCH2C(CH3)2NH(CH2)2NH2, (C2H5O)3Si(CH2)3N((CH2)2OH)2, CH3NH(CH2)3Si(OCH3)3, ((CH3)3SiO)3Si(CH2)3NHCH2CH2NH2, H2NCH2CH2NH(CH2)3(CH3)2SiOSi(CH3)3, (CH3O)3Si(CH2)3NH2, (CH3O)3Si(CH2)3N(CH3)2, (C2H5O)2CH3Si(CH2)4NH2, (CH3O)3SiCH2NHCH2CH2NH2, (CH3O)3SiC6H4CH2NHCH2CH2NH2, (CH3O)3Si(CH2)3NHCH3, (CH3O)3Si(CH2)3N(CH3)2.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |