Test tube with an internal member and test tube with a narrowed region at its closed end
US11285485B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 14, 2021 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Apr 14, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2300/0851
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A test tube may include: an annular body having an open first end, a closed second end, a longitudinal surface extending between the open first end and the closed second end and enveloping a hollow interior of the annular body and a central longitudinal axis; wherein the longitudinal surface of the annular body may include: a first longitudinal portion that may include the open first end of the annular body and having a substantially circular cross-section; and a second longitudinal portion that may include: a first longitudinal side having a substantially circular-arc cross-section; and a second longitudinal side tapering in a longitudinal direction of the annular body towards the closed second end of the annular body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.