US3552212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cleaning the exterior of an elongated body
Assignee: Individual
•
Filing: 1968-12-03
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Granted: 1971-01-05
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Expires: 1988-12-03
Abstract
Abstract A DEVICE FOR CLEANING THE OUTER SURFACE OF A TAKE-OFF TUBE IN A LIQUID ANALYSIS APPARATUS OR OTHER ELONGATED BODIES OF UNIFORM CROSS-SECTION. A COLLAR HAVING A BORE SLIGHTLY LARGER IN DIAMETER THAN THE TAKE-OFF TUBE IS POSITIONED SO THAT THE PORTION OF THE TAKE-OFF TUBE TO BE CLEANED PASSES THROUGH THE BORE WHEN IT IS MOVED UP AND DOWN TO ASPIRATE SAMPLES. SUCTION IS APPLIED TO THE ANNULAR SPACE BETWEEN THE WALLS OF THE BORE AND THE TAKE-OFF TUBE TO CAUSE AIR OR A WASH-LIQUID TO FLOW AROUND THE TAKE-OFF TUBE IN THE BORE AND ENTRAIN ANY LOOSELY ADHERING SAMPLE DEPOSITS ON THE OUTER SURFACE OF THE TAKE-OFF TUBE.
Inventors
- 👤 Erik Lars Ohlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:51
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1004
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |