US2609352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing monomeric stable methylolphenol compositions
Assignee: EIDP Inc
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Filing: 1951-05-22
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Granted: 1952-09-02
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Expires: 1971-05-22
Abstract
No abstract record available.
Inventors
- 👤 Hamline M Kvalnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:55
CPC Classifications
C; C08; C08G; C08G14/00; C08G14/02; C08G14/04; C08G14/06; C08G14/08; C08G8/00; C08G8/04; C08G8/08; C08G8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR PREPARING A STABLE, CLEAR POLYMETHYLOLPHENOL LIQUID WHICH COMPRISES HEATING FROM 4.0 TO 10.0 MOLS OF MONOMERIC FORMALDEHYDE PER MOL OF PHENOL AT A TEMPERATURE WITHIN THE RANGE OF 60* C. TO 100* C. AT A PH WITHIN THE RANGE OF 7.0 TO 9.5 UNTIL THE FREE FORMALDEHYDE CONTENT OF THE RESULTING MIXTURE IS LESS THAN 35% BY WEIGHT, AND COOLING THE MIXTURE TO BELOW 30* C., SAID FORMALDEHYDE REACTANT BEING EMPLOYED IN THE FORM OF AQUEOUS FORMALDEHYDE CONTAINING 58% TO 65% BY WEIGHT OF FORMALDEHYDE BASED ON THE TOTAL WEIGHT OF FORMALDEHYDE PLUS WATER, SAID PHENOL REACTANT BEING EMPLOYED IN THE FORM OF PHENOL CONTAINING NOT MORE THAN 20% BY WEIGHT OF WATER BASED ON THE WEIGHT OF PHENOL PLUS WATER.
Claim 2
Dependent Claim
124 words
A PROCESS FOR PREPARING A STABLE, CLEAR POLYMETHYLOLPHENOL LIQUID WHICH COMPRISES HEATING FROM 4.0 TO 10.0 MOLS OF MONOMERIC FORMALDEHYDE PER MOL OF PHENOL AT A TEMPERATURE WITHIN THE RANGE OF 60* C. TO 100* C. AT A PH WITHIN THE RANGE OF 7.0 TO 9.5 UNTIL THE FREE FORMALDEHYDE CONTENT OF THE RESULTING MIXTURE IS LESS THAN 35% BY WEIGHT, AND COOLING THE MIXTURE TO BELOW 30* C., SAID FORMALDEHYDE REACTANT BEING EMPLOYED IN THE FORM OF AQUEOUS FORMALDEHYDE CONTAINING 58% TO 65% BY WEIGHT OF FORMALDEHYDE BASED ON THE TOTAL WEIGHT OF FORMALDEHYDE PLUS WATER, SAID PHENOL REACTANT BEING EMPLOYED IN THE FORM OF PHENOL CONTAINING NOT MORE THAN 20% BY WEIGHT OF WATER BASED ON THE WEIGHT OF PHENOL PLUS WATER.
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) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |