Patent US3721065A successfully refreshed from Google Patents.
US3721065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Barrier attachment for gas chromatograph
Assignee: International Paper Co
•
Filing: 1971-01-27
•
Granted: 1973-03-20
•
Expires: 1991-01-27
Abstract
Abstract An apparatus integrated with a detection system of the type that establishes individual components in a sample gas mixture by the thermal conductivity thereof, which establishes the gas transmission rate of the sample gas through a given material. Sample gas is fed into a first cavity of a partitioned chamber and diffuses through the partition into a second cavity of the partitioned chamber. Diffused gas is swept from the second cavity with inlet carrier gas to a thermal conductivity detector in the detection system for analysis.
Inventors
- 👤 T Robicheaux
- 👤 C Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:38
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/66
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |