Patent US3842660A successfully refreshed from Google Patents.
US3842660A
Expired / Lapsed
US
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Trough applicator
Assignee: BUSKIRK H VAN
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Filing: 1973-03-19
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Granted: 1974-10-22
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Expires: 1993-03-19
Abstract
Abstract A device, intended for the correct and precise spotting of serums or other fluid substances used as samples on electrophoresis paper for examination and analyses, is disclosed herein. The Trough applicator, because of the specialized shape and configuration of the trough edge, allows a maximal blotting action on the electrophoresis paper, combined with uniform absorption, thus effecting clear electrophoretic separations.
Inventors
- 👤 Buskirk H Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:48
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44704; G01N27/44743; B; B01; B01L; B01L3/00; B01L3/02; B01L3/0241; B01L3/0244; B01L3/0255; B01L3/18; G01N35/00; G01N35/10; G01N2035/1027; G01N2035/1034; G01N2035/1037
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
328 words
A quantitative micro serum applicator device to apply a quantitative volume of serum quantitatively on electrophoresis paper comprIsing: a thin, flat, generally rectangular handle member having a top end, a bottom end, opposed parallel side edges, and opposed parallel flat top and bottom surfaces; the top end extending normal to the longitudinal axis of the handle completely between the opposite side edges thereof; a trough extending longitudinally through the handle top end completely between the opposite side edges thereof, the ends of the trough opening out of the side edges, the trough being of a concave cross-sectional configuration when viewed along a plane normal to the handle and extending through the trough, the trough extending inwardly of the handle with its outermost edges disposed equal distance inwardly from the adjacentmost top and bottom surfaces of the handle; a pair of flat thin edges defined along the handle top end, the first edge extending between the handle top surface and the adjacentmost outermost edge of the trough, the second edge being of the same identical size and configuration as the first edge and extending between the handle bottom surface and the adjacentmost outermost edge of the trough; the surfaces of each of the flat edges being highly polished and smooth; the surface of the concave trough having a fine textured -matte like finish extending completely thereover to insure complete adherence of liquid serum samples thereto when placed thereon when the trough is placed in an inverted position; whereby inversion of the handle to invert the trough to apply the serum on electrophoresis paper provides engagement of the flat edges with the paper which, under light pressure, effects a pair of spaced apart depressions along the paper with the paper material between the depressions being embossed upwardly to blot and absorb all of the serum sample and with the knife edges leaving a slight imprint on the paper after being so lifted to mark the placement of the sample thereon.
Claim 2
Dependent Claim
328 words
A quantitative micro serum applicator device to apply a quantitative volume of serum quantitatively on electrophoresis paper comprIsing: a thin, flat, generally rectangular handle member having a top end, a bottom end, opposed parallel side edges, and opposed parallel flat top and bottom surfaces; the top end extending normal to the longitudinal axis of the handle completely between the opposite side edges thereof; a trough extending longitudinally through the handle top end completely between the opposite side edges thereof, the ends of the trough opening out of the side edges, the trough being of a concave cross-sectional configuration when viewed along a plane normal to the handle and extending through the trough, the trough extending inwardly of the handle with its outermost edges disposed equal distance inwardly from the adjacentmost top and bottom surfaces of the handle; a pair of flat thin edges defined along the handle top end, the first edge extending between the handle top surface and the adjacentmost outermost edge of the trough, the second edge being of the same identical size and configuration as the first edge and extending between the handle bottom surface and the adjacentmost outermost edge of the trough; the surfaces of each of the flat edges being highly polished and smooth; the surface of the concave trough having a fine textured -matte like finish extending completely thereover to insure complete adherence of liquid serum samples thereto when placed thereon when the trough is placed in an inverted position; whereby inversion of the handle to invert the trough to apply the serum on electrophoresis paper provides engagement of the flat edges with the paper which, under light pressure, effects a pair of spaced apart depressions along the paper with the paper material between the depressions being embossed upwardly to blot and absorb all of the serum sample and with the knife edges leaving a slight imprint on the paper after being so lifted to mark the placement of the sample thereon.
Claim 3
Dependent Claim
37 words
The applicator device as set forth in claim 1 wherein the handle is manufactured of a durable thermo-plastic material. 3. The applicator as set forth in claim 1 wherein the handle is manufactured of stainless steel material.
Claim 4
Dependent Claim
18 words
The applicator device as set forth in claim 1 wherein the handle is manufactured of an aluminum alloy.
Claim 5
Dependent Claim
18 words
The applicator device as set forth in claim 1 wherein the handle is manufactured of a glass material.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |