US4330295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave discharge degradation of organics for analysis
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1979-03-05
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Granted: 1982-05-18
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Expires: 1999-03-05
Abstract
Abstract The application of continuous microwave discharges in helium to degrade and identify polymer samples coated on a quartz tube positioned in the central portion of the discharge.
Inventors
- 👤 James W. Taylor
- 👤 Romer A. Romero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:17
CPC Classifications
G; G01; G01N; G01N22/00; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/12; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A method of analysis of organic materials comprising the steps of depositing the organic material to be analyzed as a thin coating on a support located in a central portion of a discharge tube, supporting the said tube in a microwave cavity, exhausting air from the discharge tube, filling the discharge tube with helium gas, subjecting the organic material to a combination of microwave excitation and photon degradation by exposing the material to microwave discharge in helium gas at a pressure within the range of 0.5-500 Torr. and for a time within the range of 0.5-30 seconds, and sweeping the tube with an inert gas for removal of degradation products for separate determination.
Claim 2
Independent Claim
113 words
A method of analysis of organic materials comprising the steps of depositing the organic material to be analyzed as a thin coating on a support located in a central portion of a discharge tube, supporting the said tube in a microwave cavity, exhausting air from the discharge tube, filling the discharge tube with helium gas, subjecting the organic material to a combination of microwave excitation and photon degradation by exposing the material to microwave discharge in helium gas at a pressure within the range of 0.5-500 Torr. and for a time within the range of 0.5-30 seconds, and sweeping the tube with an inert gas for removal of degradation products for separate determination.
Claim 3
Dependent Claim
17 words
The method as claimed in claim 1, in which the discharge tube is a glass pyrex tube.
Claim 4
Dependent Claim
37 words
The method as claimed in claim 1, in which the organic material is an organic polymer and the organic polymer is provided as a solution which is then evaporated leaving a thin film coating on the support.
Claim 5
Dependent Claim
22 words
The method as claimed in claim 1, in which the degradation products from microwave degradation are collected for separation by gas chromatography.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |