US2759354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isothermal systems for gas analysis
Assignee: Leeds and Northrup Co
•
Filing: 1950-09-26
•
Granted: 1956-08-21
•
Expires: 1970-09-26
Abstract
No abstract record available.
Inventors
- 👤 Robert H Cherry
- 👤 Gerard M Foley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/74; G01N27/02; G01N27/04; G01N27/14; G01N27/16; G01N27/18; G01N27/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
AN ELECTRICAL GAS-ANALYSIS SYSTEM COMPRISING A REFERENCE CELL AND AN ANALYSIS CELL TRAVERSED BY GAS TO BE ANALYZED, SAID ANALYSIS CELL INCLUDING A TEMPERATURE-SENSITIVE ELECTRICALLY-HEATED RESISTOR SENSITIZED TO A CHARACTERISTIC OF A SELECTED COMPONENT OF THE GAS AND TO AMBIENT CONDITIONS, SAID REFERENCE CELL INCLUDING A TEMPERATURESENSITIVE ELECTRICALLY-HEATED RESISTOR SENSITIVE ONLY TO SAID AMBIEND CONDITIONS, BALANCEABLE NETWORKS RESPECTIVELY INCLUDING SAID RESISTORS, MEANS FOR SUPPLYING HEATING CURRENT FOR SAID RESISTORS INCLUDING ADJUSTABLE MEANS SUITED FOR
Claim 2
Dependent Claim
74 words
AN ELECTRICAL GAS-ANALYSIS SYSTEM COMPRISING A REFERENCE CELL AND AN ANALYSIS CELL TRAVERSED BY GAS TO BE ANALYZED, SAID ANALYSIS CELL INCLUDING A TEMPERATURE-SENSITIVE ELECTRICALLY-HEATED RESISTOR SENSITIZED TO A CHARACTERISTIC OF A SELECTED COMPONENT OF THE GAS AND TO AMBIENT CONDITIONS, SAID REFERENCE CELL INCLUDING A TEMPERATURESENSITIVE ELECTRICALLY-HEATED RESISTOR SENSITIVE ONLY TO SAID AMBIEND CONDITIONS, BALANCEABLE NETWORKS RESPECTIVELY INCLUDING SAID RESISTORS, MEANS FOR SUPPLYING HEATING CURRENT FOR SAID RESISTORS INCLUDING ADJUSTABLE MEANS SUITED FOR
References Cited (Backward Citations)
US1222492A
Cited
US1156660A
Cited
US1691600A
Cited
GB250478A
Cited
US1707624A
Cited
US2437449A
Cited
US2596992A
Cited
US2552017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |