US4407958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slant culture tube rack
Assignee: Manufacturers Hanover Trust Co
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Filing: 1981-12-09
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Granted: 1983-10-04
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Expires: 2001-12-09
Abstract
Abstract Test tube rack for holding a plurality of test tubes in an upright position and further adapted for holding the test tubes at slant angles of 5° from horizontal and 20° from horizontal for the preparation and growth of agar slant tube cultures or liquid tube cultures. The racks are further adapted for positive interlock stacking.
Inventors
- 👤 Harold F. DeGraff, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:08
CPC Classifications
B; B01; B01L; B01L9/00; B01L9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A culture tube rack for preparation and growth of cultures, including: a plurality of apertured plates for holding culture tubes in a generally upright position, said plates being mounted between right and left upright end plates, said end plates each including a front and a rear leg member, said front leg member having a front edge extending upward and forward to a height above the center of gravity of said rack, said rear leg member having a rear edge extending upward and rearward to a height above the center of gravity of said rack, said end plates being so configured that the front and rear leg members of one of said end plates straddle the corresponding end plate of another such tube rack for positive interlock stacking of a plurality of said racks, whereby said rack is selectively positionable upright on said front and rear foot portions, or at a first angle of tube slant, or at a second angle of tube slant.
Claim 2
Dependent Claim
163 words
A culture tube rack for preparation and growth of cultures, including: a plurality of apertured plates for holding culture tubes in a generally upright position, said plates being mounted between right and left upright end plates, said end plates each including a front and a rear leg member, said front leg member having a front edge extending upward and forward to a height above the center of gravity of said rack, said rear leg member having a rear edge extending upward and rearward to a height above the center of gravity of said rack, said end plates being so configured that the front and rear leg members of one of said end plates straddle the corresponding end plate of another such tube rack for positive interlock stacking of a plurality of said racks, whereby said rack is selectively positionable upright on said front and rear foot portions, or at a first angle of tube slant, or at a second angle of tube slant.
Claim 3
Dependent Claim
39 words
A culture tube rack as defined in claim 1 in which one of said leg members extends at a 5° angle from the vertical and the other of said leg members extends at a 20° angle from the vertical.
Claim 4
Dependent Claim
102 words
A culture tube rack for preparation and growth of cultures, including: a plurality of parallel apertured plates for holding culture tubes in a generally upright position, said plates being mounted between upright end plates, said upright end plates having: i. bottom portions on which to rest said rack in its upright position, ii. front and rear edges inclined from the vertical on which to rest said rack in respectively forward and rearward inclined positions, and iii. top portions to support the bottom portions of corresponding end plates of another such tube rack for positive interlock stacking of a plurality of such racks.
Claim 5
Dependent Claim
102 words
A culture tube rack for preparation and growth of cultures, including: a plurality of parallel apertured plates for holding culture tubes in a generally upright position, said plates being mounted between upright end plates, said upright end plates having: i. bottom portions on which to rest said rack in its upright position, ii. front and rear edges inclined from the vertical on which to rest said rack in respectively forward and rearward inclined positions, and iii. top portions to support the bottom portions of corresponding end plates of another such tube rack for positive interlock stacking of a plurality of such racks.
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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |