US2715836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determination of relative humidity
Assignee: Individual
•
Filing: 1951-06-25
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Granted: 1955-08-23
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Expires: 1971-06-25
Abstract
No abstract record available.
Inventors
- 👤 James M Brady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:36
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/56; G01N25/66; G01N25/70
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
149 words
IN AN APPARATUS FOR DETERMINING THE RELATIVE HUMIDITY OF A GAS, IN COMBINATION, A CLOSED CHAMBER, MEANS FOR ADMITTING GAS FROM OUTSIDE SAID CHAMBER TO SAID CHAMBER, MEANS COMPRISING A PISTON IN SAID CHAMBER FOR COMPRESSING THE GAS THEREIN, A MEMBER OF HIGH HEAT CONDUCTIVITY MATERIAL MOUNTED ON SAID CHAMBER TO CLOSE ONE END THEREOF AND HAVING A HIGHLY POLISHED SURFACE PORTION EXTENDING INTO SAID CHAMBER, SAID MEMBER BEING IN HEAT EXCHANGE RELATIONSHIP WITH THE GAS OUTSIDE SAID CHAMBER WHEREBY THE PORTION OF THE MEMBER IN THE CHAMBER TENDS TO REMAIN AT THE TEMPERATURE OF THE GAS OUTSIDE THE CHAMBER, SAID CHAMBER HAVING A TRANSPARENT PORTION THROUGH WHICH SAID SURFACE MAY BE OBSERVED, AND MEANS COMPRISING A SCALE FIXED WITH RESPECT TO SAID CHAMBER AND A POINTER FIXED WITH RESPECT TO SAID PISTON FOR INDICATING THE VOLUME WITHIN SAID CYLINDER AFTER COMPRESSION RELATIVE TO THE TOTAL VOLUME BEFORE COMPRESSION.
References Cited (Backward Citations)
US2566307A
Cited
US2380082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-22 | 1959-02-21 | 1959-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-22 | 1963-02-21 | 1963-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-22 | 1967-02-21 | 1967-08-23 | $7700.00 | Window Closed / Lapsed |