US3878100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation medium
Assignee: Marine Colloids Inc
•
Filing: 1973-02-01
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Granted: 1975-04-15
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Expires: 1993-02-01
Abstract
Abstract A thin layer medium for use in molecular diffusion or affinity separation processes having a layer of hydrated gel material, the surface of which is scored or cross-scored at intervals of 0.05 to 1 millimeter. The medium may be maintained wet until used or it may be dried for storage and rehydrated before use.
Inventors
- 👤 Harris J Bixler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:46
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/92; G01N30/93; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24471
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
45 words
A MEDIUM FOR USE IN APPLYING MOLECULAR DIFFUSION OR AFFINITY SEPARATION PROCESSES TO A LIQUID COMPOSITION, SAID MEDIUM COMPRISING A THIN LAYER PLATE OF DRIED SOLIDS ABSORBENT MATERIAL HYDRATABLE TO A GEL, SAID LAYER HAVING ITS SURFACE SCORE AT INTERVALS OF 0.05 TO 1 MILLIMETER.
Claim 2
Independent Claim
45 words
A MEDIUM FOR USE IN APPLYING MOLECULAR DIFFUSION OR AFFINITY SEPARATION PROCESSES TO A LIQUID COMPOSITION, SAID MEDIUM COMPRISING A THIN LAYER PLATE OF DRIED SOLIDS ABSORBENT MATERIAL HYDRATABLE TO A GEL, SAID LAYER HAVING ITS SURFACE SCORE AT INTERVALS OF 0.05 TO 1 MILLIMETER.
Claim 3
Dependent Claim
19 words
A medium as claimed in claim 1 in which said thin layer plate is bonded to a support member.
Claim 4
Dependent Claim
15 words
A medium as claimed in claim 1 in which said thin layer plate is cross-scored.
Claim 5
Dependent Claim
18 words
A medium as claimed in claim 1 in which said thin layer plate consists essentially of a polysaccharide.
Claim 6
Dependent Claim
29 words
A medium as claimed in claim 4 in which said thin layer plate consists essentially of a mixture of agarose with up to 70% by weight of an alginate.
Claim 7
Independent Claim
39 words
A medium for use in applying moleCular diffusion or affinity separation processes to a liquid composition, said medium comprising a thin layer plate of hydrated gel absorbent material having its surface scored at intervals of 0.05 to 1 millimeter.
Claim 8
Independent Claim
39 words
A medium for use in applying moleCular diffusion or affinity separation processes to a liquid composition, said medium comprising a thin layer plate of hydrated gel absorbent material having its surface scored at intervals of 0.05 to 1 millimeter.
Claim 9
Dependent Claim
19 words
A medium as claimed in claim 6 in which said thin layer plate is bonded to a support member.
Claim 10
Dependent Claim
15 words
A medium as claimed in claim 6 in which said thin layer plate is cross-scored.
Claim 11
Dependent Claim
18 words
A medium as claimed in claim 6 in which said thin layer plate consists essentially of a polysaccharide.
Claim 12
Dependent Claim
29 words
A medium as claimed in claim 9 in which said thin layer plate consists essentially of a mixture of agarose with up to 70% by weight of an alginate.
Claim 13
Independent Claim
49 words
The method of making a medium for use in applying molecular diffusion or affinity separation processes to a liquid composition, which method comprises forming a thin layer plate of hydrated gel absorbent material and scoring the surface of said thin layer plate at intervals of 0.05 to 1 millimeter.
Claim 14
Independent Claim
49 words
The method of making a medium for use in applying molecular diffusion or affinity separation processes to a liquid composition, which method comprises forming a thin layer plate of hydrated gel absorbent material and scoring the surface of said thin layer plate at intervals of 0.05 to 1 millimeter.
Claim 15
Dependent Claim
29 words
The method as claimed in claim 11 in which the thin layer plate is dried after formation and the scoring is carried out on the dried thin layer plate.
References Cited (Backward Citations)
US2380762A
Cited
US2565491A
Cited
US2785739A
Cited
US3318451A
Cited
US3511775A
Cited
US3623602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |