US4003713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple test tube evaporator
Assignee: Individual
•
Filing: 1975-08-14
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Granted: 1977-01-18
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Expires: 1995-08-14
Abstract
Abstract An apparatus for effecting evaporation of the contents of a multitude of containers, such as test tubes, including a rack and a manifold having multiple paths of open communication with a plurality of containers positioned within the rack, through which evaporation of the contents of the containers by vacuum or positive gas flow is achieved.
Inventors
- 👤 Everett N. Bowser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:45
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; B; B01; B01D; B01D1/00; G01N1/4022; G01N2001/4027; Y; Y10; Y10S; Y10S159/00; Y10S159/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
180 words
A multiple test tube evaporator comprising a. a rack having a substantially rectangularly shaped bottom wall and upstanding end walls, b. supports extending between said end walls below a midline therethrough so as to permit the upper portions of said end walls to be yieldably separable, c. means provided by said bottom wall for receiving the closed end of a test tube, d. means provided by said supports, in vertical alignment with said receiving means provided by said bottom wall, retaining said test tubes in a perpendicular position relative to said receiving means, e. a vacuum manifold removably carried between said separable end wall portions in spaced parallel relation above said supports and said bottom wall, f. recessed conically shaped seats formed in the underside of said manifold for receiving the open end of the test tube retained by said supports so as to close the same, and g. an evaporating needle depending from the underside of and having communication with said manifold concentrically of said recessed conically shaped seats for projection into a test tube held by said rack.
Claim 2
Dependent Claim
180 words
A multiple test tube evaporator comprising a. a rack having a substantially rectangularly shaped bottom wall and upstanding end walls, b. supports extending between said end walls below a midline therethrough so as to permit the upper portions of said end walls to be yieldably separable, c. means provided by said bottom wall for receiving the closed end of a test tube, d. means provided by said supports, in vertical alignment with said receiving means provided by said bottom wall, retaining said test tubes in a perpendicular position relative to said receiving means, e. a vacuum manifold removably carried between said separable end wall portions in spaced parallel relation above said supports and said bottom wall, f. recessed conically shaped seats formed in the underside of said manifold for receiving the open end of the test tube retained by said supports so as to close the same, and g. an evaporating needle depending from the underside of and having communication with said manifold concentrically of said recessed conically shaped seats for projection into a test tube held by said rack.
Claim 3
Dependent Claim
52 words
A multiple test tube evaporator defined by claim 1, wherein said supports comprise a pair of shelflike members and in which said means provided thereby for retaining said test tubes consist of circular openings formed in vertical alignment with respect to each other and said receiving means provided by said bottom wall.
Claim 4
Dependent Claim
52 words
A multiple test tube evaporator as defined by claim 1, wherein said means provided by said bottom wall for receiving the closed end of a test tube comprises a concave recess formed in the upper surface of said bottom wall, the bottom of which is open so as to permit drainage therethrough.
Claim 5
Dependent Claim
53 words
A multiple test tube evaporator as defined by claim 3, wherein said supports comprise a pair of shelflike members and in which said means provided thereby for retaining said test tubes consist of circular openings formed in vertical alignment with respect to each other and said concave recesses provided by said bottom wall.
Claim 6
Dependent Claim
51 words
A multiple test tube evaporator as defined by claim 1 further defined by providing means on the top edges of said end walls adapted to cooperate with means on the bottom coplanar edges of said end walls of a second rack for releasably holding the racks in a vertical stacked condition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |