US3709429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuges
Assignee: Individual
•
Filing: 1970-10-19
•
Granted: 1973-01-09
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Expires: 1990-10-19
Abstract
Abstract A centrifuge having a circular head horizontally mounted on a vertical rotable shaft with a resilient test tube holder mounted adjacent the head having radially disposed openings in alignment with openings in the head for frictionally engaging test tubes inserted through the openings.
Inventors
- 👤 Kenzie D Mc
- 👤 E Friedly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:25
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407; B04B5/0414
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A centrifuge comprising a circular head horizontally mounted on a vertical rotatable shaft, said head having elongated radially disposed openings for receiving test tubes and a resilient test tube holder secured beneath said head having circular openings in central alignment with the openings in said head, said circular openings having a diameter less then the width of the openings in the head, said holder having flap portions adjacent the circular openings therein.
Claim 2
Dependent Claim
72 words
A centrifuge comprising a circular head horizontally mounted on a vertical rotatable shaft, said head having elongated radially disposed openings for receiving test tubes and a resilient test tube holder secured beneath said head having circular openings in central alignment with the openings in said head, said circular openings having a diameter less then the width of the openings in the head, said holder having flap portions adjacent the circular openings therein.
Claim 3
Dependent Claim
21 words
A centrifuge as defined in claim 1 wherein the holder has oppositely disposed arcuate slits adjacent the circular forming said flaps.
Claim 4
Dependent Claim
25 words
A centrifuge as defined in claim 1 wherein the holder has an upstanding peripheral rim co-extensive with and adjacent the peripheral edge of said head.
Claim 5
Dependent Claim
28 words
A centrifuge as defined in claim 3 wherein the upper edge of the upstanding peripheral rim has spaced inwardly extending portions overlaying the upper surface of the head.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |