US2954360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing oxygen-containing condensation resins from aromatic hydrocarbons and product produced thereby
Assignee: BASF SE
•
Filing: 1952-03-08
•
Granted: 1960-09-27
•
Expires: 1972-03-08
Abstract
No abstract record available.
Inventors
- 👤 Krzikalla Hans
- 👤 Frederic Van Taack-Trakranen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:25
CPC Classifications
C; C08; C08G; C08G10/00; C08G10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR PRODUCTION OF OXYGEN-CONTAINING CONDENSATION RESINS CONTAINING 5-12% OXYGEN FROM POLYNUCLEAR, AROMATIC, NON-ALKYLATED HYDROCARBONS WHICH COMPRISES CONDENSING, IN 10-35% SULFURIC ACID AQUEOUS SOLUTION, A POLYNUCLEAR, AROMATIC, NON-ALKYLATED HYDROCARBON WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PARAFORMALDEHYDE AT A MOL RATIO OF AT LEAST 1.5 MOL EQUIVALENTS OF FORMALDEHYDE PER MOL OF SAID HYDROCARBON AT A TEMPERATURE IN THE RANGE OF FROM 90*C. UP TO THE REFLUX TEMPERATURE OF THE REACTION MIXTURE UNTIL THE CONDENSATE OF SAID AROMATIC HYDROCARBON AND SAID COMPOUND HAS AN OXYGEN CONTENT OF 5-12%, AND THEN COOLING THE REACTION MIXTURE TO STOP THE CONDENSATION REACTION.
Claim 2
Dependent Claim
104 words
A PROCESS FOR PRODUCTION OF OXYGEN-CONTAINING CONDENSATION RESINS CONTAINING 5-12% OXYGEN FROM POLYNUCLEAR, AROMATIC, NON-ALKYLATED HYDROCARBONS WHICH COMPRISES CONDENSING, IN 10-35% SULFURIC ACID AQUEOUS SOLUTION, A POLYNUCLEAR, AROMATIC, NON-ALKYLATED HYDROCARBON WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND PARAFORMALDEHYDE AT A MOL RATIO OF AT LEAST 1.5 MOL EQUIVALENTS OF FORMALDEHYDE PER MOL OF SAID HYDROCARBON AT A TEMPERATURE IN THE RANGE OF FROM 90*C. UP TO THE REFLUX TEMPERATURE OF THE REACTION MIXTURE UNTIL THE CONDENSATE OF SAID AROMATIC HYDROCARBON AND SAID COMPOUND HAS AN OXYGEN CONTENT OF 5-12%, AND THEN COOLING THE REACTION MIXTURE TO STOP THE CONDENSATION REACTION.
References Cited (Backward Citations)
US2330827A
Cited
GB576745A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |