US3773468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugable extraction and hohogenization vessel
Assignee: Individual
•
Filing: 1972-04-03
•
Granted: 1973-11-20
•
Expires: 1992-04-03
Abstract
Abstract A glass tube closed at one end and open at the other, said open end being threaded, said tube being adapted, on the one hand, to receive a pestle slidingly within it, the interior surface of the tube and the exterior surface of the pestle being roughened so as to effect grinding of the material within the tube and, on the other hand, to receive a cap for closing the tube for shaking its content together with a solvent and for sealing the contents within the tube during centrifugation.
Inventors
- 👤 R Hubbard
- 👤 W Matthew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:54
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021; B02; B02C; B02C19/00; B02C19/08; G; G01; G01N; G01N1/00; G01N1/28; G01N1/286
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
32 words
Apparatus according to claim 1, wherein the difference between the inside diameter of the Tube and the outside diameter of the head of the pestle is in the order of 0.004 inches.
Claim 2
Dependent Claim
24 words
Apparatus according to claim 1, wherein the pestle has a roughened surface which extends axially thereof and is in the order of 1.25 inches.
Claim 3
Dependent Claim
30 words
Apparatus according to claim 1, wherein the interior wall of the tube at the closed end is semispherical and the end of the head of the pestle is correspondingly shaped.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 1, wherein the interior surface of the tube at the closed end is conical, and the head of the pestle is correspondingly shaped.
Claim 5
Dependent Claim
15 words
Apparatus according to claim 1, wherein the wall thickness of the tube is 0.094 inches.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 1, wherein the tube is glass and the cap is plastic.
Claim 7
Dependent Claim
26 words
A sampling assembly according to claim 1, comprising a Teflon sealing disc fitted between the top of the cap and the open end of the tube.
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) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |