US3833341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spotting device
Assignee: Individual
•
Filing: 1973-02-26
•
Granted: 1974-09-03
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Expires: 1993-02-26
Abstract
Abstract A spotting device for depositing samples of urine, urine extracts or blood, for example, in an organic or inorganic solvent on chromatographic plates or sheets. The device includes a holding bar, adapted to receive a plurality of disposable funnels therethrough, each funnel providing an open top, above the holding bar for reception of a sample, and a small orifice in its lower end, below the holding bar, for depositing the sample on a chromatographic plate or sheet which is carried on a heating bar which is manually set to a predetermined degree of temperature. The carrying plate is pivotal from a raised position to a position wherein the lower tip ends of the funnels are in tight contact with the chromatographic plate or sheet on the heating bar. The funnels are preferably formed of an inexpensive synthetic material such as polyethylene and are intended for onetime use.
Inventors
- 👤 P Tocci
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:37
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N2035/1027; G01N2035/1034; G01N2035/1037
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
14 words
a shoulder flange for seated engagement against the bottom of said sample carrying bar,
Claim 2
Dependent Claim
18 words
A spotting device as defined in claim 1 including selective, manual temperature control means for said heating element.
Claim 3
Dependent Claim
33 words
A spotting device as defined in claim 1 wherein said lower chamber is in the form of a relatively small diameter through hole terminating at its lower end in said small discharge orifice.
Claim 4
Dependent Claim
77 words
a lower portion extending below said sample bar providing an elongated, reduced diameter lower chamber opening downwardly from said upper chamber and terminating in a small discharge orifice through its lower tip end; F. means to move said sample carrying bar to selectively position said tip end into or out of engagement with a chromatographic sheet, positioned on said heating bar means; and G. means to lock said tip end in tight engagement against the chromatographic sheet.
Claim 5
Dependent Claim
23 words
A spottinG device as defined in claim 1 wherein said disposable funnel means is molded of an inexpensive synthetic material such as polyethylene.
Claim 6
Dependent Claim
20 words
A spotting device as defined in claim 1 including a plurality of said disposable funnel means in a spaced-apart relation.
Claim 7
Dependent Claim
23 words
A spotting device as defined in claim 5 wherein each of said disposable funnels projects a predetermined distance above said sample carrying bar.
Claim 8
Dependent Claim
25 words
A spotting device as defined in claim 5 wherein said heating bar means comprises upper and lower heating bars with said heating element sandwiched therebetween.
Claim 9
Dependent Claim
54 words
A spotting device as defined in claim 7 wherein said plurality of funnel means are individually, removably disposed through respective holes in said sample carrying bar whereby the tip ends of a preselected number thereof can be simultaneously locked in tight engagement against a chromatographic sheet disposed on top of said upper heating bar.
Claim 10
Dependent Claim
25 words
A spotting device as defined in claim 1 wherein said heating element and heating bar means are resiliently mounted in said housing on spring means.
Claim 11
Dependent Claim
58 words
A spotting device as defined in claim 9 wherein said means to move comprises a first pivot attachment between opposed upper extensions of a bracket fixed to said housing and the rear end portion of said sample carrying bar, and a second pivot attachment between a handle means and the front end portion of said sample carrying bar.
Claim 12
Dependent Claim
43 words
A spotting device as defined in claim 10 wherein said handle means comprises a pair of opposed side levers attached to said sample carrying bar by said second pivot means and a transverse handle fixed between the respective ends of first arms thereof.
Claim 13
Dependent Claim
56 words
A spotting device as defined in claim 11 wherein each of said levers includes a second arm having a hook shaped end portion, adapted to lockingly engage a projection from said housing to maintain said tip ends in tight engagement with the chromatographic sheet on said heating bar means against the forces of said spring means.
References Cited (Backward Citations)
US3766884A
Cited
US3758275A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |