US3298925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic separation of substances of different molecular weight
Assignee: Individual
•
Filing: 1962-12-13
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Granted: 1967-01-17
•
Expires: 1982-12-13
Abstract
No abstract record available.
Inventors
- 👤 Mosbach Karl Theo Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:13
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/281; B01J20/291; B01J20/22; B01J20/26; B01J20/265; B01J20/267; B01J20/282; B01J20/285; B01J39/00; B01J39/08; B01J39/16; B01J39/18; B01J39/20; B01J39/26; C; C08; C08F; C08F291/00; C08F36/00; C08F36/02; C08F36/20; B01D; B01D15/00; B01D15/08; B01D15/26; B01D15/36; B01D15/361; B01J2220/00; B01J2220/50; B01J2220/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD FOR CHROMATOGRAPHIC SEPARATION OF HIGHMOLECULAR SUBSTANCES INTO FRACTIONS AND THE SEPARATION OF HIGH-MOLECULAR SUBSTANCES FROM LOW MOLECULAR SUBSTANCES, WHICH COMPRISES PASSING SAID SUBSTANCES THROUGH A BED OF SOLVENT-SWOLLEN GRANULES OF A POLYMERIZATION PRODUCT MADE BY POLYMERIZATION OF A >C=C< DOUBLE BOND-CONTAINING COMPOUND INITIALLY IN THE PRESENCE OF A POLYMERIZATION CATALYST AND TREATING THE POLYMER FORMED WITH A CROSS-LINKING AGENT IN THE PRESENCE OF A POLYMERIZATION CATALYST, THE >C=C< DOUBLE BOND-CONSISTING OF ACRYLIC ACID, ACRYLIC ACID AMIDE, ACRYLIC ACID N-DIMETHYLAMIDE, VINYL SULPHONIC ACID, DIMETHYLAMINO STYRENE, ESTERS OF ACRYLIC ACID AND VINYL ALKYL ETHERS AND USING 0.5 TO 20% BY WEIGHT OF CROSS-LINKING AGENT IN THE FORM OF N,N''-DIMETHYLENE BISACRYLAMIDE, PERFORMING THE POLYMERIZATION IN A LIQUID MEDIUM AS PEARL POLYMERIZATION, THE PRODUCTS AFTER THE CROSS-LINKING, BEING DRIED BY FREEZE-DRYING AND THEREAFTER BEING PULVERIZED, THE PRODUCT AFTER DRYING AND PULVERIZING BEING TREATED WITH A SWELLING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROPHILIC AND HYDROPHOBIC AGENTS.
Claim 2
Independent Claim
155 words
A METHOD FOR CHROMATOGRAPHIC SEPARATION OF HIGHMOLECULAR SUBSTANCES INTO FRACTIONS AND THE SEPARATION OF HIGH-MOLECULAR SUBSTANCES FROM LOW MOLECULAR SUBSTANCES, WHICH COMPRISES PASSING SAID SUBSTANCES THROUGH A BED OF SOLVENT-SWOLLEN GRANULES OF A POLYMERIZATION PRODUCT MADE BY POLYMERIZATION OF A >C=C< DOUBLE BOND-CONTAINING COMPOUND INITIALLY IN THE PRESENCE OF A POLYMERIZATION CATALYST AND TREATING THE POLYMER FORMED WITH A CROSS-LINKING AGENT IN THE PRESENCE OF A POLYMERIZATION CATALYST, THE >C=C< DOUBLE BOND-CONSISTING OF ACRYLIC ACID, ACRYLIC ACID AMIDE, ACRYLIC ACID N-DIMETHYLAMIDE, VINYL SULPHONIC ACID, DIMETHYLAMINO STYRENE, ESTERS OF ACRYLIC ACID AND VINYL ALKYL ETHERS AND USING 0.5 TO 20% BY WEIGHT OF CROSS-LINKING AGENT IN THE FORM OF N,N''-DIMETHYLENE BISACRYLAMIDE, PERFORMING THE POLYMERIZATION IN A LIQUID MEDIUM AS PEARL POLYMERIZATION, THE PRODUCTS AFTER THE CROSS-LINKING, BEING DRIED BY FREEZE-DRYING AND THEREAFTER BEING PULVERIZED, THE PRODUCT AFTER DRYING AND PULVERIZING BEING TREATED WITH A SWELLING AGENT SELECTED FROM THE GROUP CONSISTING OF HYDROPHILIC AND HYDROPHOBIC AGENTS.
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |