Patent US4666424A successfully refreshed from Google Patents.
US4666424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge door
Assignee: Thermo Fisher Scientific Asheville LLC
•
Filing: 1985-12-03
•
Granted: 1987-05-19
•
Expires: 2005-12-03
Abstract
Abstract A centrifuge having an access opening is closed by a door having a chamber defined on the interior thereof. The chamber is connectable to a low pressure region so that the chamber may be evacuated.
Inventors
- 👤 David S. Harlacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:51
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A centrifuge comprising: a housing having an access opening of a predetermined size and configuration; and a door movable with respect to the housing from an open to a closed position, in the closed position the door completely covering the access opening, the door having an enclosed chamber formed on the interior thereof that is sized and configured to overlap the access opening, the chamber being connectable to a low pressure region thereby to evacuate the chamber.
Claim 2
Dependent Claim
77 words
A centrifuge comprising: a housing having an access opening of a predetermined size and configuration; and a door movable with respect to the housing from an open to a closed position, in the closed position the door completely covering the access opening, the door having an enclosed chamber formed on the interior thereof that is sized and configured to overlap the access opening, the chamber being connectable to a low pressure region thereby to evacuate the chamber.
Claim 3
Dependent Claim
22 words
The centrifuge of claim 1 further comprising a spacer mounted within the chamber to support the door when the chamber is evacuated.
Claim 4
Dependent Claim
40 words
The centrifuge of claim 1 wherein the door comprises an upper plate and a lower plate, one of the plates having a recess therein and the other of the plates covering the recess thereby to define the enclosed chamber therebetween.
Claim 5
Dependent Claim
25 words
The centrifuge of claim 3 further comprising a spacer mounted between the upper and lower plates to support the same when the chamber is evacuated.
Claim 6
Dependent Claim
18 words
The centrifuge of claim 4 wherein the upper plate is plastic and the lower plate is stainless steel.
Claim 7
Dependent Claim
18 words
The centrifuge of claim 3 wherein the upper plate is plastic and the lower plate is stainless steel.
Claim 8
Dependent Claim
13 words
The centrifuge of claim 6 wherein the height of the chamber is uniform.
Claim 9
Dependent Claim
13 words
The centrifuge of claim 5 wherein the height of the chamber if uniform.
Claim 10
Dependent Claim
13 words
The centrifuge of claim 4 wherein the height of the chamber is uniform.
Claim 11
Dependent Claim
13 words
The centrifuge of claim 2 wherein the height of the chamber is uniform.
Claim 12
Dependent Claim
13 words
The centrifuge of claim 1 wherein the height of the chamber is uniform.
References Cited (Backward Citations)
US4053104A
Cited
US4196844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |