US3155289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for accurately measured dispensation of material
Assignee: F and M Scientific Corp
•
Filing: 1963-02-05
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Granted: 1964-11-03
•
Expires: 1983-02-05
Abstract
No abstract record available.
Inventors
- 👤 James M Kauss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:11
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
APPARATUS FOR ACCURATELY DETERMINING, CONTROLLING, AND DISPENSING SAMPLES OF FLUID MATERIAL INTO THE MOVING PHASE OF A CHROMATOGRAPHIC PREPARATORY SEPARATOR OR THE LIKE, COMPRISING, IN COMBINATION: AN INTEGRAL PAIR OF AXIALLY ALIGNED CYLINDERS, ONE OF SAID CYLINDERS BEING A SAMPLE DISPENSING CYLINDER EQUIPPED WITH INLET MEANS AND OUTLET MEANS, THE OTHER OF SAID CYLINDERS BEING A PNEUMATIC CYLINDER, A PISTON ELEMENT HAVING A FACE IN EACH OF SAID CYLINDERS, SAID ELEMENTS BEING RIGIDLY JOINED TOGETHER TO FORM A DISPENSING PISTON, MEANS FOR SUPPLYING SAID MATERIAL AT A PREDETERMINED PRESSURE TO SAID INLET MEANS, ADJUSTABLE MEANS FOR LIMITING THE TRAVEL OF THE DISPENSING PISTON THEREBY TO VARY THE VOLUME OF THE DISPENSED SAMPLE,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |