US3744296A
Expired / Lapsed
US
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Coated piezoelectric analyzers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1971-05-07
•
Granted: 1973-07-10
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Expires: 1991-05-07
Abstract
Abstract Piezoelectric and magnetostrictive materials coated with charge transfer complexes of halogens are effective detectors for materials capable of being halogenated, such as olefins.
Inventors
- 👤 M Beltzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:57
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/02; G01N29/036; G01N2291/00; G01N2291/02; G01N2291/025; G01N2291/0256; Y; Y10; Y10T; Y10T436/00; Y10T436/21; Y10T436/214; Y10T436/216
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
11 words
The element of claim 1 wherein said responsive material is quartz.
Claim 2
Dependent Claim
23 words
The element of claim 1 wherein the polymeric charge transfer material has an endocyclic nitrogen atom in the repeating unit of the polymer.
Claim 3
Dependent Claim
24 words
The element of claim 1 wherein the charge transfer material is selected from the group consisting of poly (4-vinyl-pyridine), poly (2-vinylpyridine) and poly(N-vinyl carbazole).
Claim 4
Dependent Claim
13 words
The element of claim 1 wherein the charge transfer material is poly (4-vinylpyridine).
Claim 5
Dependent Claim
25 words
The element of claim 1 wherein the halogen is selected from the group consisting of bromine, chlorine, iodine, iodine chloride, bromine iodide and bromine chloride.
Claim 6
Dependent Claim
10 words
The element of claim 1 wherein the halogen is bromine.
Claim 7
Dependent Claim
65 words
In an apparatus for the detection of fluids wherein an electronic oscillation means is controlled by a responsive material in which the surface of said material is coated with the substrate subjected to contact with the test fluid, the improvement wherein the substrate material comprises a halogen complex of a polymeric charge transfer material having a nitrogen atom in the repeating unit of the polymer.
Claim 8
Dependent Claim
21 words
The improvement of claim 8 wherein the halogen is selected from the group consisting of bromine, chlorine, iodine and inter-halogen compounds.
Claim 9
Dependent Claim
25 words
The improvement of claim 8 wherein the charge transfer material is selected from the group consisting of poly (2-vinylpyridine), poly (4-vinylpyridine) and poly (N-vinyl carbazole).
Claim 10
Independent Claim
58 words
A method of detecting materials capable of being halogenated comprising contacting a test fluid with a coated piezoelectric detector, said detector having a coating of a halogen complex of a polymeric charge transfer material having a nitrogen atom in the repeating unit of the polymer, and measuring the change in electrical response of such coated piezoelectric crystal detector.
Claim 11
Dependent Claim
12 words
The method of claim 11 wherein the test fluid contains an olefin.
Claim 12
Dependent Claim
17 words
The method of claim 11 wherein halogen is bromine and the charge transfer complex is poly (4-vinylpyridine).
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |