Patent US2687342A successfully refreshed from Google Patents.
US2687342A
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Method and apparatus for testing gas
Assignee: MSA Safety Inc
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Filing: 1952-10-15
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Granted: 1954-08-24
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Expires: 1972-10-15
Abstract
No abstract record available.
Inventors
- 👤 John P Strange
- 👤 Peter V Paulus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:23
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/16; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25125
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
THAT METHOD OF SUPPLYING GAS SAMPLE AT SUBSTANTIALLY CONSTANT HUMIDITY TO A GAS TESTING UNIT THE RESPONSE OF WHICH IS AFFECTED BY HUMIDITY COMPRISING CONTACTING THE GAS SAMPLE ON ITS WAY TO SAID UNIT WITH POLYVINYL ALCOHOL.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |