US3627432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction vessel for use in photometric measurements
Assignee: Eppendorf SE
•
Filing: 1969-04-29
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Granted: 1971-12-14
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Expires: 1989-04-29
Abstract
Abstract A small vessel having generally cylindrical form is described. This vessel has a flange at the upper rim and the lower portion is provided with parallel planar surfaces particularly suitable for photometric measurement of the contents of the vessel.
Inventors
- 👤 Wilhelm Bergmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:00
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; G; G01; G01N; G01N21/00; G01N21/01; G01N21/03
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
110 words
A reaction vessel suitable for the photometric measurement of small quantities of liquid, comprising an upper cylindrical portion having a longitudinal axis, a lower portion having opposed parallel planar walls, a connecting portion providing a transition between said upper and lower portions, and outwardly projecting ribs extending longitudinally on each side of said opposed parallel planar walls disposed to leave a flat central portion therebetween, the outer edges of said ribs establishing points on the circumference of a circle, said circle being disposed within a transverse plane through said vessel and orthogonal to said axis, whereby the outer edges of said ribs form the outline of a substantially cylindrical configuration.
Claim 2
Dependent Claim
110 words
A reaction vessel suitable for the photometric measurement of small quantities of liquid, comprising an upper cylindrical portion having a longitudinal axis, a lower portion having opposed parallel planar walls, a connecting portion providing a transition between said upper and lower portions, and outwardly projecting ribs extending longitudinally on each side of said opposed parallel planar walls disposed to leave a flat central portion therebetween, the outer edges of said ribs establishing points on the circumference of a circle, said circle being disposed within a transverse plane through said vessel and orthogonal to said axis, whereby the outer edges of said ribs form the outline of a substantially cylindrical configuration.
Claim 3
Dependent Claim
18 words
A reaction vessel according to claim 1, wherein the center of said circle lies on said longitudinal axis.
Claim 4
Dependent Claim
19 words
A reaction vessel according to claim 1, wherein said circle has the same radius as said upper cylindrical portion.
Claim 5
Dependent Claim
37 words
A reaction vessel according to claim 1, wherein each of said opposed parallel planar walls comprise planar portions that define chords on a circle disposed within a transverse plane through said vessel and orthogonal to said axis.
Claim 6
Dependent Claim
25 words
A reaction vessel according to claim 1, wherein the wall sections of said vessel between said parallel planar walls are opposed parallel planar lateral surfaces.
Claim 7
Dependent Claim
24 words
A reaction vessel according to claim 5, wherein end ribs project from said lateral surfaces as prolongations of said first mentioned parallel planar walls.
Claim 8
Dependent Claim
44 words
A reaction vessel according to claim 1, wherein said vessel tapers at the bottom, said taper being effected essentially by a chamfer of said projecting ribs, and wherein the interior of said vessel has a constant rectangular cross section extending to the bottom thereof.
Claim 9
Dependent Claim
13 words
A reaction vessel according to claim 1, having substantially equal wall thickness throughout.
Claim 10
Dependent Claim
26 words
A reaction vessel according to claim 1, wherein the inner cross section of the vessel is rectangular at least in the region of said planar walls.
Claim 11
Dependent Claim
26 words
A reaction vessel according to claim 9, wherein a projecting portion extends from the bottom of the vessel and exhibits a substantially rectangular transverse cross section.
Claim 12
Dependent Claim
38 words
A reaction vessel according to claim 10, wherein the longer axis of said rectangular cross section extends parallel to said first mentioned parallel planar walls and at least the edges of said projection are straight in this direction.
Claim 13
Dependent Claim
27 words
A reaction vessel according to claim 11, wherein at least on two sides of said projecting portion, stepped surfaces extend at right angles to said longitudinal axis.
References Cited (Backward Citations)
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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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |