US2859205A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making styrenated phenolformaldehyde resins
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-11-26
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Granted: 1958-11-04
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Expires: 1976-11-26
Abstract
No abstract record available.
Inventors
- 👤 Lection Frank Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:39
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR PREPARING A PERMANENTLY FUSIBLE RESIN WHICH COMPRISES REACTING ONE MOL OF A MONONYDRIC PHENOL TAKEN FROM THE GROUP CONSISTING OF PHENOL, CRESOLS, XYLENOLS AND MIXTURES THEREOF WITH 0.1-0.2 MOL OF A STYRENE TAKEN FROM THE GROUP CONSISTING OF STYRENE, RING-SUBSTITUTED CHLOROSTYRENES, RING-SUBSTITUTED ALKYSTYRENES, AND MIXTURES THEREOF AT REFLUX TEMPERATURE UNDER ACID CONDITIONS AND IMMEDIATELY AFTER THE REACTION IS COMPLETED ADDING 0.7-0.9 MOL OF AN AQUEOUS SOLUTION OF FORMALDEHYDE TO THE REACTION MEDIUM UNDER REFLUX CONDITIONS AND THEN CONTINUING THE REACTION UNTIL SUBSTANTIALLY ALL THE FORMALDEHYDE IS CHEMICALLY COMBINED.
Claim 2
Dependent Claim
91 words
A PROCESS FOR PREPARING A PERMANENTLY FUSIBLE RESIN WHICH COMPRISES REACTING ONE MOL OF A MONONYDRIC PHENOL TAKEN FROM THE GROUP CONSISTING OF PHENOL, CRESOLS, XYLENOLS AND MIXTURES THEREOF WITH 0.1-0.2 MOL OF A STYRENE TAKEN FROM THE GROUP CONSISTING OF STYRENE, RING-SUBSTITUTED CHLOROSTYRENES, RING-SUBSTITUTED ALKYSTYRENES, AND MIXTURES THEREOF AT REFLUX TEMPERATURE UNDER ACID CONDITIONS AND IMMEDIATELY AFTER THE REACTION IS COMPLETED ADDING 0.7-0.9 MOL OF AN AQUEOUS SOLUTION OF FORMALDEHYDE TO THE REACTION MEDIUM UNDER REFLUX CONDITIONS AND THEN CONTINUING THE REACTION UNTIL SUBSTANTIALLY ALL THE FORMALDEHYDE IS CHEMICALLY COMBINED.
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) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |