Patent US2504109A successfully refreshed from Google Patents.
US3298236A
Expired / Lapsed
US
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Sampling device
Assignee: BP PLC
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Filing: 1964-04-01
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Granted: 1967-01-17
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Expires: 1984-04-01
Abstract
No abstract record available.
Inventors
- 👤 Thomas William Llewelyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:03
CPC Classifications
B; B01; B01J; B01J3/00; B01J3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A SAMPLING DEVICE CAPABLE OF WITHDRAWING SAMPLES OF FLUID FROM, OR INTRODUCING SAMPLES OF FLUID INTO, APPARATUS OPERATING UNDER A HIGH DEGREE OF VACUUM OR AT A HIGH PRESSURE, COMPRISING A HYPODERMIC SYRINGE INCLUDING A BARREL, A NEEDLE OF HYPODERMIC TUBING OPERATIVELY SECURED TO SAID BARREL, A PISTON POSITIONED WITHIN AND HAVING A DIAMETER APPROXIMATELY EQUAL TO THE BORE OF SAID BARREL, SAID PISTON HAVING A GROOVE AROUND ITS PERIPHERY IN A PLANE NORMAL TO ITS LONGITUDINAL AXIS AND AN O-RING LOCATED IN SAID GROOVE SEALING WITH SAID BARREL, AND A THREADED MEMBER FIXED TO SAID PISTON, THE ARRANGEMENT BEING SUCH THAT ROTATION OF SAID THREADED MEMBER RELATIVE TO SAID BARREL CAUSES LONGITUDINAL MOVEMENT OF SAID PISTON WITHIN SAID BARREL.
Claim 2
Dependent Claim
120 words
A SAMPLING DEVICE CAPABLE OF WITHDRAWING SAMPLES OF FLUID FROM, OR INTRODUCING SAMPLES OF FLUID INTO, APPARATUS OPERATING UNDER A HIGH DEGREE OF VACUUM OR AT A HIGH PRESSURE, COMPRISING A HYPODERMIC SYRINGE INCLUDING A BARREL, A NEEDLE OF HYPODERMIC TUBING OPERATIVELY SECURED TO SAID BARREL, A PISTON POSITIONED WITHIN AND HAVING A DIAMETER APPROXIMATELY EQUAL TO THE BORE OF SAID BARREL, SAID PISTON HAVING A GROOVE AROUND ITS PERIPHERY IN A PLANE NORMAL TO ITS LONGITUDINAL AXIS AND AN O-RING LOCATED IN SAID GROOVE SEALING WITH SAID BARREL, AND A THREADED MEMBER FIXED TO SAID PISTON, THE ARRANGEMENT BEING SUCH THAT ROTATION OF SAID THREADED MEMBER RELATIVE TO SAID BARREL CAUSES LONGITUDINAL MOVEMENT OF SAID PISTON WITHIN SAID BARREL.
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |