Patent US2568313A successfully refreshed from Google Patents.
US2568313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of resins from aldehydes and aromatic hydrocarbons
Assignee: Individual
•
Filing: 1948-12-09
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Granted: 1951-09-18
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Expires: 1968-12-09
Abstract
No abstract record available.
Inventors
- 👤 Woolhouse Thomas Geoffrey
- 👤 Lunn William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:12
CPC Classifications
C; C08; C08G; C08G10/00; C08G10/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR THE MANUFACTURE OF RESINS WHICH COMPRISES REACTING AN ALDEHYDE IN THE PRESENCE OF AN ACID WITH AN AROMATIC HYDROCARBON HAVING NO NON-BENZOID UNSATURATION, EXTRACTING THE REACTION PRODUCT FROM THE REACTION MIXTURE WITH AN ORGANIC SOLVENT IMMISEIBLE WITH WATER IN THE PRESENCE OF AN EMULSION-BREAKING WETTING AGENT WHICH HAS SURFACE ACTIVITY IN THE PRESENCE OF THE ACID USED, THE SAID AGENT BEING ADDED IN A PROPORTION TO BREAK AN EMULSION LIABLE TO BE FORMED IN THE EXTRACTION, SEPARATING THE SOLUTION OF THE REACTION PRODUCT IN THE ORGANIC SOLVENT FROM THE ACID PHASE, NEUTRALISING THE SAID SOLUTION WITH A SOLID SUBSTANTIALLY WATER-FREE NEUTRALISING AGENT, ISOLATING THE NEUTRAL SOLUTION AND REMOVING THE SOLVENT.
Claim 2
Dependent Claim
113 words
A PROCESS FOR THE MANUFACTURE OF RESINS WHICH COMPRISES REACTING AN ALDEHYDE IN THE PRESENCE OF AN ACID WITH AN AROMATIC HYDROCARBON HAVING NO NON-BENZOID UNSATURATION, EXTRACTING THE REACTION PRODUCT FROM THE REACTION MIXTURE WITH AN ORGANIC SOLVENT IMMISEIBLE WITH WATER IN THE PRESENCE OF AN EMULSION-BREAKING WETTING AGENT WHICH HAS SURFACE ACTIVITY IN THE PRESENCE OF THE ACID USED, THE SAID AGENT BEING ADDED IN A PROPORTION TO BREAK AN EMULSION LIABLE TO BE FORMED IN THE EXTRACTION, SEPARATING THE SOLUTION OF THE REACTION PRODUCT IN THE ORGANIC SOLVENT FROM THE ACID PHASE, NEUTRALISING THE SAID SOLUTION WITH A SOLID SUBSTANTIALLY WATER-FREE NEUTRALISING AGENT, ISOLATING THE NEUTRAL SOLUTION AND REMOVING THE SOLVENT.
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) | 1954-09-17 | 1955-03-19 | 1955-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-17 | 1959-03-19 | 1959-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-17 | 1963-03-19 | 1963-09-18 | $7700.00 | Window Closed / Lapsed |