US3306111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatograph sample system
Assignee: Combustion Engineering Inc
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Filing: 1964-12-07
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Granted: 1967-02-28
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Expires: 1984-12-07
Abstract
No abstract record available.
Inventors
- 👤 Charles R Ferrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/20; G01N30/26; G01N30/38; G01N2030/382; G01N2030/383
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
AN ENTRANCE SYSTEM FOR A CHROMATOGRAPH, INCLUDING, A CHROMATOGRAPHIC COLUMN, A VALVE ELEMENT ARRANGED TO CONNECT A PASSAGE IN THE ELEMENT WITH THE COLUMN, MEANS FOR PLACING A SAMPLE TO BE ANALYZED BY THE COLUMN WITHIN THE VALVE ELEMENT PASSAGE, A SOURCE OF CARRIER GAS CONNECTED BETWEEN THE VALVE ELEMENT PASSAGE AND THE COLUMN WITH AN ARRANGEMENT WHICH CAUSES THE SAMPLE WITHIN THE PASSAGE TO BE EJECTED ALONG THE AXIS OF THE STREAM OF CARRIER GAS FLOWING INTO THE COLUMN, A SOURCE OF FLUID PRESSURE HIGHER THAN THE PRESSURE OF THE SOURCE OF CARRIER GAS, AND MEANS FOR PLACING THE VALVE PASSAGE INTO SIMULTANEOUS COMMUNICATION BETWEEN THE SOURCE OF HIGH PRESSURE AND THE COLUMN, WHEREBY THE SAMPLE IS INJECTED INTO THE CARRIER GAS AND ENTERS THE COLUMN AS A BODY WITH SHARPLY DEFINED BOUNDARIES.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |