US4755301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for centrifugal recovery of retentate
Assignee: Amicon Corp
•
Filing: 1986-08-12
•
Granted: 1988-07-05
•
Expires: 2006-08-12
Abstract
Abstract Disclosed is an apparatus and method for using the apparatus to centrifugally recover a maximal amount of concentrated macromolecular retentate.
Inventors
- 👤 William F. Bowers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:53
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; B; B01; B01D; B01D61/00; B01D61/14; B01D61/18; B01D63/00; B01D63/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A system for the centrifugal recovery of concentrated macromolecular liquid retentate comprising; (a) an apparatus comprising: a retentate reservoir containing macromolecular liquid retentate; a filter means attached to the top of the retentate reservoir, said filter means comprising: a semipermeable membrane; and an inverted support for said membrane having one or more filtrate ducts which, in conjunction with sealing means, holds the membrane in place; means for providing a liquid tight seal between the periphery of the retentate reservoir, the membrane, and the membrane support; a retentate cup attached to the bottom of the retentate reservoir; means for attaching the filter means to the retentate reservoir; means for attaching the retentate cup to the retentate reservoir; and (b) a centrifuge to receive said apparatus.
Claim 2
Independent Claim
124 words
A system for the centrifugal recovery of concentrated macromolecular liquid retentate comprising; (a) an apparatus comprising: a retentate reservoir containing macromolecular liquid retentate; a filter means attached to the top of the retentate reservoir, said filter means comprising: a semipermeable membrane; and an inverted support for said membrane having one or more filtrate ducts which, in conjunction with sealing means, holds the membrane in place; means for providing a liquid tight seal between the periphery of the retentate reservoir, the membrane, and the membrane support; a retentate cup attached to the bottom of the retentate reservoir; means for attaching the filter means to the retentate reservoir; means for attaching the retentate cup to the retentate reservoir; and (b) a centrifuge to receive said apparatus.
Claim 3
Dependent Claim
13 words
The apparatus of claim 1 wherein the membrane comprises an anisotropic ultrafiltration membrane.
Claim 4
Independent Claim
135 words
A method for centrifugally recovering concentrated macromolecular liquid retentate from the retentate reservoir of an apparatus, which apparatus comprises: a retentate reservoir containing macromolecular liquid retentate; a filter means attached to the top of the retentate reservoir, said filter means comprising: a semipermeable membrane; and an inverted support for said membrane having one or more filtrate ducts, which, in conjunction with sealing means, holds the membrane in place; means for providing a liquid tight seal between the periphery of the retentate reservoir, the membrane and the membrane support; a retentate cup attached to the bottom of the retentate reservoir; means for attaching the filter means to the retentate reservoir; and means for attaching the retentate cup to the retentate reservoir, comprising centrifuging the apparatus to expel a maximal amount of retentate into the retentate cup.
Claim 5
Independent Claim
135 words
A method for centrifugally recovering concentrated macromolecular liquid retentate from the retentate reservoir of an apparatus, which apparatus comprises: a retentate reservoir containing macromolecular liquid retentate; a filter means attached to the top of the retentate reservoir, said filter means comprising: a semipermeable membrane; and an inverted support for said membrane having one or more filtrate ducts, which, in conjunction with sealing means, holds the membrane in place; means for providing a liquid tight seal between the periphery of the retentate reservoir, the membrane and the membrane support; a retentate cup attached to the bottom of the retentate reservoir; means for attaching the filter means to the retentate reservoir; and means for attaching the retentate cup to the retentate reservoir, comprising centrifuging the apparatus to expel a maximal amount of retentate into the retentate cup.
Claim 6
Dependent Claim
12 words
The method of claim 3 wherein the membrane comprises an anisotropic membrane.
Claim 7
Dependent Claim
12 words
The method of claim 3 wherein the membrane comprises an ultrafiltration membrane.
References Cited (Backward Citations)
US4632761A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |