US2611759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic molding compound
Assignee: Heresite and Chemical Co
•
Filing: 1950-01-26
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Granted: 1952-09-23
•
Expires: 1970-01-26
Abstract
No abstract record available.
Inventors
- 👤 Hempel Charles Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:26
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/04; C08G8/08; C08G8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF FORMING A HEAT SETTING FORMALDEHYDE BASE MOLDING COMPOSITION WHICH COMPRISES FORMING PHENOL FORMALDEHYDEHYDE RESIN BY REACTING THE RESIN-FORMING INGREDIENTS IN AQUEOUS SOLUTION, AND VIOLENTLY AGITATING THE RESIN UNDER VACUUM AT A TEMPERATURE NOT SUBSTANTIALLY ABOVE 95* C., DURING WHICH AGITATION THE PRODUCT PASSES THROUGH A SYRUPY PHASE AND INTO A SOFT LUMPY PHASE, AND THEN STOPPING THE AGITATION AND COOLING THE RESIN WHEN IT FORMS INTO A DRY MOLDING POWDER.
Claim 2
Independent Claim
73 words
THE METHOD OF FORMING A HEAT SETTING FORMALDEHYDE BASE MOLDING COMPOSITION WHICH COMPRISES FORMING PHENOL FORMALDEHYDEHYDE RESIN BY REACTING THE RESIN-FORMING INGREDIENTS IN AQUEOUS SOLUTION, AND VIOLENTLY AGITATING THE RESIN UNDER VACUUM AT A TEMPERATURE NOT SUBSTANTIALLY ABOVE 95* C., DURING WHICH AGITATION THE PRODUCT PASSES THROUGH A SYRUPY PHASE AND INTO A SOFT LUMPY PHASE, AND THEN STOPPING THE AGITATION AND COOLING THE RESIN WHEN IT FORMS INTO A DRY MOLDING POWDER.
References Cited (Backward Citations)
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US954666A
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US1927375A
Cited
US1981514A
Cited
US2137568A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-23 | 1956-03-24 | 1956-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-23 | 1960-03-24 | 1960-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-23 | 1964-03-24 | 1964-09-23 | $7700.00 | Window Closed / Lapsed |