US4151915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide smearing device
Assignee: GlaxoSmithKline LLC
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Filing: 1978-03-03
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Granted: 1979-05-01
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Expires: 1998-03-03
Abstract
Abstract A device for smearing on slides a drop of liquid placed on a predetermined point on each slide has slide magazines containing a plurality of slides with the uppermost slide in each magazine having its upper face exposed for the reception of a drop of liquid towards one end thereof. Spreaders are adjacent the other ends of the slides. Means advance the spreaders out of contact with the slides, lower the spreaders into contact with the slides as they approach said predetermined points on the slides and slow the advance of the spreaders as they approach said points. The spreaders are retracted and the angle between each spreader and slide decreases to thin the smear of liquid. Means advance the uppermost slide in each magazine forwardly out of the magazine a predetermined distance to facilitate the removal of the slide by hand after the desired smear is made.
Inventors
- 👤 Marshall S. Levine
- 👤 Albert A. Faulkner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:53
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/2813
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
A magazine for microscope slides for use in a slide smearing device comprising: a casing having a front, a rear, opposed sides, a bottom, and an open top to permit spreading of a liquid on the uppermost slide, microscope slides in the casing, means adjacent the top of the casing to limit the upward movement of the uppermost slide in the casing in position for the removal of only the uppermost slide in a substantially horizontal plane, a tape with opposed ends, said tape being secured to the slides with each slide spaced from the next adjacent slide to keep the slides from sticking together, one of said opposed sides having an opening to permit the tape to be stripped off the slides, and a portion of the tape extending underneath the lowermost slide and being secured to the other of said opposed sides to support the slides in the magazine.
Claim 2
Dependent Claim
151 words
A magazine for microscope slides for use in a slide smearing device comprising: a casing having a front, a rear, opposed sides, a bottom, and an open top to permit spreading of a liquid on the uppermost slide, microscope slides in the casing, means adjacent the top of the casing to limit the upward movement of the uppermost slide in the casing in position for the removal of only the uppermost slide in a substantially horizontal plane, a tape with opposed ends, said tape being secured to the slides with each slide spaced from the next adjacent slide to keep the slides from sticking together, one of said opposed sides having an opening to permit the tape to be stripped off the slides, and a portion of the tape extending underneath the lowermost slide and being secured to the other of said opposed sides to support the slides in the magazine.
Claim 3
Dependent Claim
186 words
A magazine for microscope slides for use in a slide smearing device comprising: a casing having a front, a rear, opposed sides, a bottom, and an open top to permit spreading of a liquid on the uppermost slide, microscope slides in the casing, and a flange on the inside of each side adjacent its upper end to limit the upward movement of the uppermost slide in the casing and position it for the spreading of liquid thereon through the open top and for removal forwardly in a plane parallel to the plane in which the flanges lie, the upper end of the front of the casing being opposite the slide immediately below the uppermost slide with the top of said front at a level below the uppermost slide, and the front end of each of said flanges being spaced to the rear of the front of the casing to provide for the tilting upwardly of the uppermost slide and the slide immediately below the uppermost slide when they are stuck together to clear the front of the casing as the slides are advanced forwardly for removal.
Claim 4
Dependent Claim
186 words
A magazine for microscope slides for use in a slide smearing device comprising: a casing having a front, a rear, opposed sides, a bottom, and an open top to permit spreading of a liquid on the uppermost slide, microscope slides in the casing, and a flange on the inside of each side adjacent its upper end to limit the upward movement of the uppermost slide in the casing and position it for the spreading of liquid thereon through the open top and for removal forwardly in a plane parallel to the plane in which the flanges lie, the upper end of the front of the casing being opposite the slide immediately below the uppermost slide with the top of said front at a level below the uppermost slide, and the front end of each of said flanges being spaced to the rear of the front of the casing to provide for the tilting upwardly of the uppermost slide and the slide immediately below the uppermost slide when they are stuck together to clear the front of the casing as the slides are advanced forwardly for removal.
Claim 5
Dependent Claim
16 words
A magazine in accordance with claim 2 having means to retain the slides in the magazine.
Claim 6
Dependent Claim
17 words
A magazine in accordance with claim 2 having permanent means to retain the slides in the magazine.
References Cited (Backward Citations)
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US2543681A
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US3589557A
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US3834018A
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US4018643A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |