Patent US4923978A successfully refreshed from Google Patents.
US4923978A
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Process for purifying nucleic acids
Assignee: Fleet Capital Corp
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Filing: 1987-12-28
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Granted: 1990-05-08
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Expires: 2007-12-28
Abstract
Abstract The process for separating the proteinaceous materials from nucleic acids involves contacting a solution containing the proteinaceous materials and nucleic acids with a solid phase extraction material capable of binding proteins to form bound and unbound fractions and then isolating the unbound fraction containing the nucleic acids.
Inventors
- 👤 Randy M. McCormick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:19
CPC Classifications
C; C12; C12N; C12N15/00; C12N15/09; C12N15/10; C12N15/1003; C12N15/1006; Y; Y10; Y10S; Y10S530/00; Y10S530/82; Y10S530/821
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A process for separating enzymes from nucleic acids which comprises a. contacting a solution containing enzymes and nucleic acids with a rehydrated silica gel said rehydrated silica gel having a specific surface area of 50 to 150 m 2/ g and pores throughout having an effective diameter of 60 Å to 150 and having surface hydroxyl groups at a concentration of 0.1 μmol/m 2 to 8 mol/m 2 and at a pK a between 6 and 10 capable of binding enzymes to leave an unbound fraction containing the nucleic acids; and b. isolating the unbound fraction.
Claim 2
Dependent Claim
96 words
A process for separating enzymes from nucleic acids which comprises a. contacting a solution containing enzymes and nucleic acids with a rehydrated silica gel said rehydrated silica gel having a specific surface area of 50 to 150 m 2/ g and pores throughout having an effective diameter of 60 Å to 150 and having surface hydroxyl groups at a concentration of 0.1 μmol/m 2 to 8 mol/m 2 and at a pK a between 6 and 10 capable of binding enzymes to leave an unbound fraction containing the nucleic acids; and b. isolating the unbound fraction.
Claim 3
Dependent Claim
49 words
A process as in claim 1 wherein said rehydrated silica gel is a particulate material substantially devoid of trivalent metal cations on its surface and having surface hydroxyl groups at a concentration of 0.1 μmol/m 2 to 8 μmol/m 2 and at a pK a between 6 and 7.5.
Claim 4
Dependent Claim
12 words
A process as in claim 1 wherein said nucleic acids contain DNA.
Claim 5
Dependent Claim
12 words
A process as in claim 2 wherein said nucleic acids contain DNA.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |