US2839587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of ortho-methylolphenols
Assignee: —
•
Filing: —
•
Granted: 1958-06-17
•
Expires: 1975-06-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:12
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20; C07C37/68; C07C37/70; C07C37/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PROCESS WHICH COMPRISES CONDENSING A MOLAR EXCESS OF A MONOHYDRIC PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, META-CRESOL AND META-ETHYL PHENOL WITH FORMALDHYDE IN AN AQUEOUS REACTION MIXTURE HAVING A PH VALUE IN THE RANGE 4 TO 7 AND IN THE PRESENCE OF A SALT OF A DIVALENT ELECTRO-POSITIVE METAL WITH AN ORGANIC ACID, WHICH SALT IS AT LEAST PARTIALLY SOLUBLE IN THE REACTION MIXTURE, BY HEATING THE REACTION MIXTURE TO A TEMPERATURE NOT ABOVE THE REFLUX TEMPERATURE OF THE MIXTURE TO GIVE A PRODUCT CONTAINING ORTHO-METHYLOL PHENOLS, AND DISCONTINUING THE HEATING WHEN SUBSTANTIALLY ALL THE FORMALDEHYDE HAS REACTED.
Claim 2
Dependent Claim
101 words
A PROCESS WHICH COMPRISES CONDENSING A MOLAR EXCESS OF A MONOHYDRIC PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL, META-CRESOL AND META-ETHYL PHENOL WITH FORMALDHYDE IN AN AQUEOUS REACTION MIXTURE HAVING A PH VALUE IN THE RANGE 4 TO 7 AND IN THE PRESENCE OF A SALT OF A DIVALENT ELECTRO-POSITIVE METAL WITH AN ORGANIC ACID, WHICH SALT IS AT LEAST PARTIALLY SOLUBLE IN THE REACTION MIXTURE, BY HEATING THE REACTION MIXTURE TO A TEMPERATURE NOT ABOVE THE REFLUX TEMPERATURE OF THE MIXTURE TO GIVE A PRODUCT CONTAINING ORTHO-METHYLOL PHENOLS, AND DISCONTINUING THE HEATING WHEN SUBSTANTIALLY ALL THE FORMALDEHYDE HAS REACTED.
References Cited (Backward Citations)
US563975A
Cited
US2744882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |