Patent US1712779A successfully refreshed from Google Patents.
Patent US3265215A successfully refreshed from Google Patents.
US3265215A
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Gel filtration apparatus
Assignee: Global Life Sciences Solutions USA LLC
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Filing: 1963-04-11
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Granted: 1966-08-09
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Expires: 1983-04-11
Abstract
No abstract record available.
Inventors
- 👤 Emneus Nils Ingvar Arne
- 👤 Flodin Per Gustaf Magnus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:04
CPC Classifications
B; B01; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/34; G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/6017
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A GEL FILTRATION APPARATUS, COMPRISING IN COMBINATION: (A) AN ELONGATED UPRIGHT FILTRATION COLUMN HAVING A TOP COVER AND A BOTTOM MEMBER, (B) SAID BOTTOM MEMBER BEING PERFORATED BUT ADAPTED TO SUPPORT A BED OF GEL EXTENDING ONLY A PART OF THE WAY UP THE LENGTH OF SAID COLUMN, (C) A SAMPLE DISTRIBUTOR NORMALLY POSITIONED WITHIN SAID COLUMN ABOVE SAID BED OF GEL, (D) SAID SAMPLE DISTRIBUTOR HAVING ENOUGH BUOYANCY SO THAT IT RESTS ON THE TOP OF GEL BED WITHOUT COMPRESSING IT AND FOLLOWS THE MOVEMENT OF THE GEL BED, (E) AN INLET FOR SAMPLE LIQUID IN SAID TOP COVER, SAID INLET BEING CONNECTED TO SAID SAMPLE DISTRIBUTOR BY MEANS OF A CONDUIT,
Claim 2
Dependent Claim
113 words
A GEL FILTRATION APPARATUS, COMPRISING IN COMBINATION: (A) AN ELONGATED UPRIGHT FILTRATION COLUMN HAVING A TOP COVER AND A BOTTOM MEMBER, (B) SAID BOTTOM MEMBER BEING PERFORATED BUT ADAPTED TO SUPPORT A BED OF GEL EXTENDING ONLY A PART OF THE WAY UP THE LENGTH OF SAID COLUMN, (C) A SAMPLE DISTRIBUTOR NORMALLY POSITIONED WITHIN SAID COLUMN ABOVE SAID BED OF GEL, (D) SAID SAMPLE DISTRIBUTOR HAVING ENOUGH BUOYANCY SO THAT IT RESTS ON THE TOP OF GEL BED WITHOUT COMPRESSING IT AND FOLLOWS THE MOVEMENT OF THE GEL BED, (E) AN INLET FOR SAMPLE LIQUID IN SAID TOP COVER, SAID INLET BEING CONNECTED TO SAID SAMPLE DISTRIBUTOR BY MEANS OF A CONDUIT,
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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |