US3657188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous production of resoles
Assignee: Butler Manufacturing Co
•
Filing: 1970-03-02
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Granted: 1972-04-18
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Expires: 1990-03-02
Abstract
Abstract A NEW, LOW VISCOSITY, LOW WATER CONTENT PHENOL ALDEHYDE RESOLE AND A METHOD OF PRODUCING THE RESOLE CONTINUSOULY BY CONTROLLING THE TEMPERATURES AND TIME OF REACTION. THE TIME OF REACTION IS CONTROLLED BY BOTH MOVING THE REACTANTS FROM ONE ZONE TO ANOTHER AND BY NEUTRALIZING PRIOR TO REMOVAL OF EXCESS WATER.
Inventors
- 👤 Carl C Perkins Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:54
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; Y; Y10; Y10S; Y10S521/00; Y10S521/917
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |