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Patent US3705018A successfully refreshed from Google Patents.
US3705018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resealable test tube
Assignee: BILLY W TAYLOR
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Filing: 1970-06-10
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Granted: 1972-12-05
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Expires: 1990-06-10
Abstract
Abstract AN OPEN ENDED TEST TUBE INTO WHICH A RESILIENT, SEALING PLUG IS INSERTED. A U-SHAPED FLOW TUBE EEXTENDS REMOVABLY THROUGH A PAIR OF SPACED APART APERTURES IN THE PLUG AND MAINTAINS THE TEST TUBE SEALED. WITHDRAWAL OF ONE TUBE END FROM ONE OF THE APERTURES AND APPLICATION OF A NEGATIVE OR POSITITVE PRESSURE TO THE THUS OPENED APERTURE FORCES FLUID MATERIALS VIA THE FLOW TUBE INTO OR OUT OF THE TEST TUBE. THE PLUG INCLUDES MEANS FOR POSITIONING AND HOLDING THE WITHDRAWN FLOW TUBE SECTION EXTERIORLY OF THE TEST TUBE.
Inventors
- 👤 Billy W Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:43
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |