US3677986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of para-substituted phenol/formaldehyde resins
Assignee: Monsanto Australia Ltd
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Filing: 1970-02-26
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Granted: 1972-07-18
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Expires: 1990-02-26
Abstract
Abstract PROCESS FOR THE PRODUCTION OF ALKYL OR ARYL P-SUBSTITUTED PHENOL/FORMALDEHYDE RESINS IN WHICH A PHENOLIC COMPONENT SUCH AS AN ALKYL P-SUBSTITUTED PHENOL OR AN ARYL PSUBSTITUTED PHENOL IS FIRST REACTED WITH FORMALDEHYDE IN THE PRESENCE OF AN INORGANIC ALKALINE CATLYST IN A HETEROGENEOUS MULTI-PHASE REACTION MEDIUM AFTER WHICH THE REACTION PRODUCT IS ETHERIFIED TO PRODUCE THE DESIRED RESIN PRODUCT.
Inventors
- 👤 Alan D Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:25
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/12; C08G8/28; C08G8/36
Claims Analysis
Total Claims: 0
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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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |