US2671336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen analyzer
Assignee: Universal Oil Products Co
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Filing: 1949-11-30
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Granted: 1954-03-09
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Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Hulsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:49
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A METER FOR MEASURING HYDROGEN CONCENTRATION IN A GASEOUS MIXTURE, WHICH COMPRISES IN COMBINATION, AN EXTENDED LENGHT OF COILED HYDROGEN PERMEABLE TUBE OF SMALL DIAMETER AND HAVING A CLOSED END THERETO ADAPTED FOR PLACE-
Claim 2
Dependent Claim
34 words
A METER FOR MEASURING HYDROGEN CONCENTRATION IN A GASEOUS MIXTURE, WHICH COMPRISES IN COMBINATION, AN EXTENDED LENGHT OF COILED HYDROGEN PERMEABLE TUBE OF SMALL DIAMETER AND HAVING A CLOSED END THERETO ADAPTED FOR PLACE-
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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |