US3700893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining the contents of contained gas samples
Assignee: National Aeronautics and Space Administration
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Filing: 1971-02-12
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Granted: 1972-10-24
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Expires: 1991-02-12
Abstract
Abstract An apparatus for analyzing gas samples in containers comprising a vacuum chamber, a sealable opening in said vacuum chamber for inserting a sample holder, means to open said sample and release the gas in the container, pressure sensing means, and means for analyzing the gas released by opening the sample. The apparatus is operated by placing a sample containing the gas to be analyzed on the sample holder, sealing and evacuating the chamber, taking a background gas analysis, opening the sample container to allow the gas contained therein to escape into the evacuated chamber and withdrawing the released gas to the analysis apparatus.
Inventors
- 👤 Benjamin Seidenberg
- 👤 Alfred J Hobbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:21
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N1/00; G01N1/02; G01N1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A method for non-destructively analyzing gas samples contained in a device having a fill tube comprising the steps of: a. measuring the device to determine the point where the fill tube may be cut open to refill the device; b. mounting the device on a sample tray to facilitate contact of the fill tube with a cutting instrument at the proper location on the tube; c. placing the sample tray and device in a vacuum chamber; d. evacuating said chamber to a pressure in the range of 10 4 to 10 6 Torr; e. obtaining a background gas analysis reading of the vacuum chamber; f. moving said device to a position to effectuate opening at the fill tube; g. releasing the contained sample by opening the container fill tube; and h. analyzing the gas contained in said sample by means of gas analysis.
Claim 2
Independent Claim
143 words
A method for non-destructively analyzing gas samples contained in a device having a fill tube comprising the steps of: a. measuring the device to determine the point where the fill tube may be cut open to refill the device; b. mounting the device on a sample tray to facilitate contact of the fill tube with a cutting instrument at the proper location on the tube; c. placing the sample tray and device in a vacuum chamber; d. evacuating said chamber to a pressure in the range of 10 4 to 10 6 Torr; e. obtaining a background gas analysis reading of the vacuum chamber; f. moving said device to a position to effectuate opening at the fill tube; g. releasing the contained sample by opening the container fill tube; and h. analyzing the gas contained in said sample by means of gas analysis.
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |