Patent US4545958A successfully refreshed from Google Patents.
Patent US3356071A successfully refreshed from Google Patents.
US3356071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic streaking machine
Assignee: STWB Inc
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Filing: 1965-06-15
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Granted: 1967-12-05
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Eric R Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:46
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A CHROMATOGRAPHIC STREAKING DEVICE FOR APPLYING TO A SURFACE A CONTINUOUS LINE OF LIQUID, SAID DEVICE COMPRISING A CARRIAGE, GUIDE MEANS IN WHICH SAID CARRIAGE IS GUIDED FOR MOVEMENT, A HOLLOW NEEDLE THROUGH WHICH LIQUID CAN BE EJECTED, A SYRINGE ON ONE END OF WHICH THE HOLLOW NEEDLE IS MOUNTED AND COMPRISING A TUBULAR PORTION HAVING A UNIFORM BORE AND OPENING INTO SAID HOLLOW NEEDLE FOR HOLDING THE LIQUID FOR FEEDING TO THE HOLLOW NEEDLE, A PISTON HEAD MOUNTED IN SAID UNIFORM BORE, AND A CONNECTING ROD HAVING ONE END IN CONTACT WITH SAID PISTON HEAD, A DRIVE WHEEL, MICROMETER MEASURING MEANS MOUNT-
Claim 2
Dependent Claim
103 words
A CHROMATOGRAPHIC STREAKING DEVICE FOR APPLYING TO A SURFACE A CONTINUOUS LINE OF LIQUID, SAID DEVICE COMPRISING A CARRIAGE, GUIDE MEANS IN WHICH SAID CARRIAGE IS GUIDED FOR MOVEMENT, A HOLLOW NEEDLE THROUGH WHICH LIQUID CAN BE EJECTED, A SYRINGE ON ONE END OF WHICH THE HOLLOW NEEDLE IS MOUNTED AND COMPRISING A TUBULAR PORTION HAVING A UNIFORM BORE AND OPENING INTO SAID HOLLOW NEEDLE FOR HOLDING THE LIQUID FOR FEEDING TO THE HOLLOW NEEDLE, A PISTON HEAD MOUNTED IN SAID UNIFORM BORE, AND A CONNECTING ROD HAVING ONE END IN CONTACT WITH SAID PISTON HEAD, A DRIVE WHEEL, MICROMETER MEASURING MEANS MOUNT-
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |