US3712295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge tube
Assignee: Individual
•
Filing: 1970-08-03
•
Granted: 1973-01-23
•
Expires: 1990-08-03
Abstract
Abstract This invention is directed to a centrifuge tube formed from molded plastic and includes a body shaped as a bellows-folded helix having a closed bottom and a syringe tip at its top. The bottom may be pierced following centrifuging of the contents by a double tipped needle so that the tube may also serve as a positive syringe to expel any desired portion of the collected solids for subsequent examination.
Inventors
- 👤 W Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:11
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0291; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021; G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/07; Y; Y10; Y10S; Y10S385/00; Y10S385/901; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/2575
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
105 words
An axially collapsible and laterally distortable centrifuge tube formed from plastic and including a body having side walls shaped as a bellows folded plural turn helix, said body having a closed bottom including a needle-penetrable membrane, the bottom of said body being tapered on opposite sides of said membrane by two diametrically opposed concave hollows that define abutments for properly positioning said tube during centrifuging or other manipulative operations, said opposed concave hollows defining a passage therebetween positioned distally of said needlepenetrable membrane, the top of said body being provided with an axially extending hollow tip in open communication with the interior of said body.
Claim 2
Dependent Claim
105 words
An axially collapsible and laterally distortable centrifuge tube formed from plastic and including a body having side walls shaped as a bellows folded plural turn helix, said body having a closed bottom including a needle-penetrable membrane, the bottom of said body being tapered on opposite sides of said membrane by two diametrically opposed concave hollows that define abutments for properly positioning said tube during centrifuging or other manipulative operations, said opposed concave hollows defining a passage therebetween positioned distally of said needlepenetrable membrane, the top of said body being provided with an axially extending hollow tip in open communication with the interior of said body.
Claim 3
Dependent Claim
31 words
The centrifuge tube of claim 1 in which said body is formed from a plastic having a memory whereby to return to its normal configuration after having been physically distorted therefrom.
Claim 4
Dependent Claim
21 words
The centrifuge tube of claim 2 in which said plastic is selected from the group consisting of polyethylene, polypropylene and polyurethane.
References Cited (Backward Citations)
CA773863A
Cited
US2353153A
Cited
US2771071A
Cited
FR1248279A
Cited
US3175553A
Cited
US3181529A
Cited
US3340869A
Cited
US3424148A
Cited
GB1112715A
Cited
US3473524A
Cited
FR1493491A
Cited
US3557788A
Cited
US3570662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |