US3252331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laboratory apparatus
Assignee: Cooke Engineering Co
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Filing: 1964-11-23
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Granted: 1966-05-24
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Expires: 1984-11-23
Abstract
No abstract record available.
Inventors
- 👤 Jesse F Lancaster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:05
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B01; B01L; B01L3/00; B01L3/02; B01L3/0241; B01L3/0244; B01L3/0255; G; G01; G01F; G01F19/00; G01N; G01N1/00; G01N1/02; G01N1/10; G01N1/12; G01N1/28; G01N1/38; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A VOLUMETRIC LIQUID TRANSFER DEVICE COMPRISING A RIGID ONE-PIECE LIQUID ENTRAPPING CAGE FOR CARRYING A LIQUID HAVING A SURFACE TENSION, SAID CAGE HAVING AN EXTERIOR CONFIGURATION INCLUDING AN AXIALLY ELONGATED ANNULAR SURFACE PORTION AND END SURFACES AT OPPOSITE ENDS OF SAID ANNULAR SURFACE PORTION WHICH ARE SYMMETRICAL WITH THE AXIS OF SYMMETRY OF SAID ANNULAR SURFACE PORTION AND IN WHICH THE PORTION OF SAID CAGE DEFINED BY SAID ANNULAR SURFACE PORTION AND AT LEAST ONE OF SAID END SURFACES IS PROVIDED WITH A CENTRAL CHAMBER EXTENDING AXIALLY FROM AND THROUGH SAID ONE END SURFACE AND A PLURALITY OF CAPILLARY CHANNELS COMMUNICATING WITH AND RADIATING FROM THE CHAMBER OF SAID CAGE, THE SIZE OF EACH SUCH CAPILLARY CHANNEL BEING NOT GREATER THAN THAT WHICH WILL RETAIN SAID LIQUID IN SAID CAGE BY SURFACE TENSION.
Claim 2
Dependent Claim
133 words
A VOLUMETRIC LIQUID TRANSFER DEVICE COMPRISING A RIGID ONE-PIECE LIQUID ENTRAPPING CAGE FOR CARRYING A LIQUID HAVING A SURFACE TENSION, SAID CAGE HAVING AN EXTERIOR CONFIGURATION INCLUDING AN AXIALLY ELONGATED ANNULAR SURFACE PORTION AND END SURFACES AT OPPOSITE ENDS OF SAID ANNULAR SURFACE PORTION WHICH ARE SYMMETRICAL WITH THE AXIS OF SYMMETRY OF SAID ANNULAR SURFACE PORTION AND IN WHICH THE PORTION OF SAID CAGE DEFINED BY SAID ANNULAR SURFACE PORTION AND AT LEAST ONE OF SAID END SURFACES IS PROVIDED WITH A CENTRAL CHAMBER EXTENDING AXIALLY FROM AND THROUGH SAID ONE END SURFACE AND A PLURALITY OF CAPILLARY CHANNELS COMMUNICATING WITH AND RADIATING FROM THE CHAMBER OF SAID CAGE, THE SIZE OF EACH SUCH CAPILLARY CHANNEL BEING NOT GREATER THAN THAT WHICH WILL RETAIN SAID LIQUID IN SAID CAGE BY SURFACE TENSION.
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) | 1969-05-23 | 1969-11-22 | 1970-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-23 | 1973-11-22 | 1974-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-23 | 1977-11-22 | 1978-05-24 | $7700.00 | Window Closed / Lapsed |