US3566698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Septumless inlet for chromatographs
Assignee: Hamilton Co Inc
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Filing: 1969-10-23
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Granted: 1971-03-02
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Expires: 1989-10-23
Abstract
Abstract AN INLET APPARATUS FOR CHROMATOGRAPHS, HAVING A SHUTTLE MOVABLE BETWEEN A NORMAL INOPERATIVE, RETRACTED POSITION AND A SECOND, OPERATIVE POSITION. WHEN THE NEEDLE OF A SYRINGE OR SYRINGE APPARATUS IS INSERTED INTO THE INLET APPARATUS, THE SYRINGE APPARATUS SEALS WITH THE BORE OF THE SHUTTLE AND AS THE SYRINGE IS PUSHED FURTHER INTO THE APPARATUS, THE SHUTTLE IS MOVED TO THE SECOND POSITION SO THAT WHEN A SIDE PORT IN THE SYRINGE IS OPENED, CARRIER GAS ENTERS THE SIDE OPENING AND WASHED THE SAMPLE FROM THE SYRINGE, THROUGH THE SHUTTLE BORE AND INTO THE COLUMN OF THE CHROMATOGRAPH.
Inventors
- 👤 William M Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:04
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/16; G01N30/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |