US3187486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for bidimensional gas chromatography for preparative purposes
Assignee: Laboratori Riuniti Studi E Ricerche SpA
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Filing: 1961-03-14
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Granted: 1965-06-08
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Expires: 1981-03-14
Abstract
No abstract record available.
Inventors
- 👤 Dinelli Dino
- 👤 Taramasso Marco
- 👤 Polezzo Stefano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:53
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/46; G01N30/466; G01N30/04; G01N30/16; G01N30/60; G01N30/6004; G01N30/6017; G01N30/6034; G01N30/6043; G01N30/50; G01N30/58; G01N30/80
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A PROCESS FOR SEPARATING A FLUID MIXTURE INTO ITS COMPONENTS BY MEANS OF GAS CHROMATOGRAPHY, COMPRISING FEEDING THE MIXTURE SUCCESSIVELY INTO ONE END OF EACH OF A PLURALITY OF SEPARATE HELICAL PASSAGEWAYS WHICH ARE FILLED WITH THE STATIONARY PHASE FOR THE GAS CHROMATOGRAPHIC METHOD AND WHICH ARE ARRANGED CIRCULARITY ABOUT A COMMON AXIS, WHILE ROTATING THE PASSAGEWAYS TOGETHER ABOUT SAID COMMON AXIS, AND WHILE FEEDING THE CARRIER GAS FOR THE GAS CHROMATOGRAPHIC PROCESS CONTINUOUSLY INTO ALL SAID PASSAGEWAYS AT SAID ONE END THEREOF EXCEPT FOR THE ONE PASSAGEWAY WHICH AT ANY INSTANT IS THE
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |