Patent US4629293A successfully refreshed from Google Patents.
Patent US3677066A successfully refreshed from Google Patents.
US3677066A
Expired / Lapsed
US
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Method for preconditioning piezoelectric sorption detectors
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-07-31
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Granted: 1972-07-18
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Expires: 1990-07-31
Abstract
Abstract Highly sensitive sorption detectors are prepared from colloidal dispersions of high surface area porous materials. These sensitive sorption detectors are preconditioned by exposure to certain specified liquids. Preconditioning stabilizes the output signal of the detector making them particularly useful in measuring trace components in gas streams.
Inventors
- 👤 William H King Jr
- 👤 Walter A Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:08
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/02; G01N29/036; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0036; G01N33/0044; G01N2291/00; G01N2291/02; G01N2291/025; G01N2291/0256
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
49 words
A method of stabilizing the output signal of a silica coated crystal detector comprising contacting said detector with a sufficient amount of a high boiling point liquid selected from the group consisting of polyalkyl ethers, polyalkyl glycols and mixtures thereof whereby the sensitivity of the detector is rendered constant.
Claim 2
Independent Claim
49 words
A method of stabilizing the output signal of a silica coated crystal detector comprising contacting said detector with a sufficient amount of a high boiling point liquid selected from the group consisting of polyalkyl ethers, polyalkyl glycols and mixtures thereof whereby the sensitivity of the detector is rendered constant.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said detector is contacted with vapors of said high boiling point liquid carried in a gas stream.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein said gas stream is composed essentially of an inert gas.
Claim 5
Dependent Claim
14 words
The method of claim 1 wherein said high boiling point liquid is polypropylene ether.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said high boiling point liquid is a polyethylene glycol.
Claim 7
Independent Claim
65 words
A method of preconditioning a silica coated piezoelectric detector comprising passing a gas stream through a high boiling polar liquid selected from the group consisting of polyalkyl ethers, polyalkyl glycols and mixtures thereof and then passing said gas stream in contact with said detector for a time sufficient to stabilize the output signal of said detector whereby the sensitivity of the detector is rendered constant.
Claim 8
Independent Claim
65 words
A method of preconditioning a silica coated piezoelectric detector comprising passing a gas stream through a high boiling polar liquid selected from the group consisting of polyalkyl ethers, polyalkyl glycols and mixtures thereof and then passing said gas stream in contact with said detector for a time sufficient to stabilize the output signal of said detector whereby the sensitivity of the detector is rendered constant.
Claim 9
Dependent Claim
14 words
The method of claim 6 wherein said polar liquid is at about 100* C.
Claim 10
Independent Claim
51 words
A method of preparing a piezoelectric detector comprising: coating a piezoelectric crystal with a silica material having a high ratio of surface area to unit volume; and exposing said coated crystal to a high boiling point polar liquid selected from the group consisting of polyalkyl ethers, polyalkyl glycols and mixtures thereof.
Claim 11
Independent Claim
51 words
A method of preparing a piezoelectric detector comprising: coating a piezoelectric crystal with a silica material having a high ratio of surface area to unit volume; and exposing said coated crystal to a high boiling point polar liquid selected from the group consisting of polyalkyl ethers, polyalkyl glycols and mixtures thereof.
Claim 12
Dependent Claim
25 words
The method of claim 8 wherein said silica material has an average surface area of from about 135 to about 430 square meters per gram.
Claim 13
Dependent Claim
24 words
The method of claim 8 wherein said silica has an average surface area of from about 330 to about 430 square meters per gram.
Claim 14
Independent Claim
40 words
A method of stabilizing the output signal of a highly active silica coated piezoelectric crystal comprising: exposing said silica coated crystal to a high boiling oxygenated hydrocarbon selected from the group consisting of poly-alkyl ethers, polyalkyl glycols and mixtures thereof.
Claim 15
Independent Claim
40 words
A method of stabilizing the output signal of a highly active silica coated piezoelectric crystal comprising: exposing said silica coated crystal to a high boiling oxygenated hydrocarbon selected from the group consisting of poly-alkyl ethers, polyalkyl glycols and mixtures thereof.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |