US2561414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for gas analysis
Assignee: Tennessee Valley Authority
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Filing: 1946-11-16
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Granted: 1951-07-24
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Expires: 1966-11-16
Abstract
No abstract record available.
Inventors
- 👤 Jr James E Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:27
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
204 words
AN APPARATUS FOR ANALYZING AN ATMOSPHERE OF KNOWN DENSITY TO DETERMINE CONTAMINATION THEREOF BY A FOREIGN GAS OF DIFFERENT CENSITY WHICH COMPRISES, IN COMBINATION, A NONPERVIOUS BASE HAVING AN OPENING THERETHROUGH; A POROUS PORCELAIN THIMBLE HAVING A MAXIMUM PORE DIAMETER OF ABOUT 1.3 MICRONS SEALED TO SAID BASE AND COOPERATING THEREWITH TO ENCLOSE A CHAMBER, AND ADAPTED TO BE FREELY EXPOSED TO AN ATMOSPHERE; A TUBE DISPOSED IN SAID OPENING IN GASTIGHT RELATIONSHIP TO SAID BASE, COMMUNICATING WITH THE INTERIOR OF SAID CHAMBER, ATTACHED TO AND DISPOSED OUTSIDE SAID CHAMBER, ATTACHED TO AND COMMUNICATING WITH SAID TUBE IN PRESSURE-RESPONSIVE RELATIONSHIP THEREWITH; AND MEANS FOR SWEEPING AWAY THE ATMOSPHERE IN CONTACT WITH THE OUTE SURFACE OF SAID POROUS THIMBLE AND ESTABLISHING A LAYER OF GAS OF KNOWN DENSITY IN CONTACT THEREWITH COMPRISING A SOURCE OF GAS OF KNOWN DENSITY AND UNDER PRESSURE, A CONDUIT COMMUNICATING THEREWITH, A VALVE ADAPTED TO INTERRUPT FLOW OF GAS DISPOSED IN SAID CONDUIT, AND A MANIFOLD ATTACHED TO AND COMMUNICATING WITH SAID CONDUIT ON THE OPPOSITE SIDE OF SAID VALVE FROM SAID SOURCE OF GAS PRESSURE, DISPOSED TO SURROUND SAID THIMBLE ADJACENT TO SAID BASE AND HAVING OPENINGS ADAPTED TO EMIT GAS ADJACENT TO THE OUTER SURFACE OF SAID THIMBLE.
Claim 2
Independent Claim
204 words
AN APPARATUS FOR ANALYZING AN ATMOSPHERE OF KNOWN DENSITY TO DETERMINE CONTAMINATION THEREOF BY A FOREIGN GAS OF DIFFERENT CENSITY WHICH COMPRISES, IN COMBINATION, A NONPERVIOUS BASE HAVING AN OPENING THERETHROUGH; A POROUS PORCELAIN THIMBLE HAVING A MAXIMUM PORE DIAMETER OF ABOUT 1.3 MICRONS SEALED TO SAID BASE AND COOPERATING THEREWITH TO ENCLOSE A CHAMBER, AND ADAPTED TO BE FREELY EXPOSED TO AN ATMOSPHERE; A TUBE DISPOSED IN SAID OPENING IN GASTIGHT RELATIONSHIP TO SAID BASE, COMMUNICATING WITH THE INTERIOR OF SAID CHAMBER, ATTACHED TO AND DISPOSED OUTSIDE SAID CHAMBER, ATTACHED TO AND COMMUNICATING WITH SAID TUBE IN PRESSURE-RESPONSIVE RELATIONSHIP THEREWITH; AND MEANS FOR SWEEPING AWAY THE ATMOSPHERE IN CONTACT WITH THE OUTE SURFACE OF SAID POROUS THIMBLE AND ESTABLISHING A LAYER OF GAS OF KNOWN DENSITY IN CONTACT THEREWITH COMPRISING A SOURCE OF GAS OF KNOWN DENSITY AND UNDER PRESSURE, A CONDUIT COMMUNICATING THEREWITH, A VALVE ADAPTED TO INTERRUPT FLOW OF GAS DISPOSED IN SAID CONDUIT, AND A MANIFOLD ATTACHED TO AND COMMUNICATING WITH SAID CONDUIT ON THE OPPOSITE SIDE OF SAID VALVE FROM SAID SOURCE OF GAS PRESSURE, DISPOSED TO SURROUND SAID THIMBLE ADJACENT TO SAID BASE AND HAVING OPENINGS ADAPTED TO EMIT GAS ADJACENT TO THE OUTER SURFACE OF SAID THIMBLE.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |