US2674589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low flow, short cure phenolic resin binder
Assignee: Honeywell International Inc
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Filing: 1952-02-25
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Granted: 1954-04-06
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Expires: 1972-02-25
Abstract
No abstract record available.
Inventors
- 👤 Gordon A Coleman
- 👤 Leslie T Sutherland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:49
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF PREPARING A HEAT-REACTIVE PHENOL-FORMALDEHYDE RESIN FOR USE IN THE PRODUCTION OF BINDER RESIN WHICH COMPRISES CONDENSING PHENOL WITH FORMALDEHYDE IN THE MOLAL PROPORTION OF ABOUT 6 MOLS PHENOL WITH 5 MOLS FORMALDEHYDE IN THE PRESENCE OF AN ACID CATALYST TO PRODUCE A FUSIBLE RESIN, SEPARATING WATER FROM THE REACTION PRODUCTS, ADMIXING THE DEHYDRATED FUSIBLE RESIN IN MOLTEN CONDITION WITH AN AQUEOUS HEXAMETHYLENETETRAMINE SOLUTION IN AN AMOUNT OF 0.5-3% BY WEIGHT HEXAMETHYLENETETRAMINE BASED ON THE FUSIBLE RESIN, MAINTAINING THE MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 135-180* C. FOR ABOUT 2-7 MINUTES TO PRODUCE A HEAT-REACTIVE RESIN, AND COOLING AND SOLIDIFYING THE HEAT-REACTIVE RESIN.
Claim 2
Independent Claim
107 words
A METHOD OF PREPARING A HEAT-REACTIVE PHENOL-FORMALDEHYDE RESIN FOR USE IN THE PRODUCTION OF BINDER RESIN WHICH COMPRISES CONDENSING PHENOL WITH FORMALDEHYDE IN THE MOLAL PROPORTION OF ABOUT 6 MOLS PHENOL WITH 5 MOLS FORMALDEHYDE IN THE PRESENCE OF AN ACID CATALYST TO PRODUCE A FUSIBLE RESIN, SEPARATING WATER FROM THE REACTION PRODUCTS, ADMIXING THE DEHYDRATED FUSIBLE RESIN IN MOLTEN CONDITION WITH AN AQUEOUS HEXAMETHYLENETETRAMINE SOLUTION IN AN AMOUNT OF 0.5-3% BY WEIGHT HEXAMETHYLENETETRAMINE BASED ON THE FUSIBLE RESIN, MAINTAINING THE MIXTURE AT A TEMPERATURE WITHIN THE RANGE OF 135-180* C. FOR ABOUT 2-7 MINUTES TO PRODUCE A HEAT-REACTIVE RESIN, AND COOLING AND SOLIDIFYING THE HEAT-REACTIVE RESIN.
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) | 1957-04-05 | 1957-10-05 | 1958-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-05 | 1961-10-05 | 1962-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-05 | 1965-10-05 | 1966-04-06 | $7700.00 | Window Closed / Lapsed |