Patent US3304784A successfully refreshed from Google Patents.
US3304784A
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Apparatus for measuring minute amounts of fluids
Assignee: Hyland Laboratories Inc
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Filing: 1964-03-24
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Granted: 1967-02-21
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Expires: 1984-03-24
Abstract
No abstract record available.
Inventors
- 👤 Thomas M Asher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:30
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/02; B01L3/0241; B01L3/0262; B01J; B01J4/00; B01J4/02; G; G01; G01F; G01F11/00; B01L2300/00; B01L2300/02; B01L2300/025; B01L2300/028; B01L2300/08; B01L2300/0832; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0406; B01L3/021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN APPARATUS FOR MEASURING AND DELIVERING A MINUTE AMOUNT OF FLUID, SAID APPARATUS COMPRISING AN UNGRADUATED CAPILLARY TUBE OF KNOWN INNER DIAMETER AND OPEN AT BOTH ENDS AND MEANS OF TEMPORARILY MAGNIFYING AND GRADUATING SAID TUBE, SAID MEANS COMPRISING A GENERALLY SEMI-CYLINDRICAL TRANSPARENT MEMBER HAVING A CURVED WALL AND A SUBSTANTIALLY FLAT WALL, THE SUBSTANTIALLY FLAT WALL OF SAID MEMBER BEING PROVIDED WITH CAPILLARY TUBE RETAINING MEANS AND WITH GRADUATION INDICATION MEANS, SAID RETAINING MEANS COMPRISING A STEP FORMED IN THE SUBSTANTIALLY FLAT WALL.
Claim 2
Independent Claim
84 words
AN APPARATUS FOR MEASURING AND DELIVERING A MINUTE AMOUNT OF FLUID, SAID APPARATUS COMPRISING AN UNGRADUATED CAPILLARY TUBE OF KNOWN INNER DIAMETER AND OPEN AT BOTH ENDS AND MEANS OF TEMPORARILY MAGNIFYING AND GRADUATING SAID TUBE, SAID MEANS COMPRISING A GENERALLY SEMI-CYLINDRICAL TRANSPARENT MEMBER HAVING A CURVED WALL AND A SUBSTANTIALLY FLAT WALL, THE SUBSTANTIALLY FLAT WALL OF SAID MEMBER BEING PROVIDED WITH CAPILLARY TUBE RETAINING MEANS AND WITH GRADUATION INDICATION MEANS, SAID RETAINING MEANS COMPRISING A STEP FORMED IN THE SUBSTANTIALLY FLAT WALL.
References Cited (Backward Citations)
US2405418A
Cited
US2736097A
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US2319556A
Cited
US2389282A
Cited
US2586581A
Cited
US3204446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |