US2679490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of molding compositions from urea-formaldehyde and cellulose containing material
Assignee: Honeywell International Inc
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Filing: 1951-09-06
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Granted: 1954-05-25
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Expires: 1971-09-06
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Meiser
- 👤 Andrew W Kassay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:49
CPC Classifications
C; C08; C08L; C08L61/00; C08L61/20; C08L61/22; C08L61/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A METHOD OF PRODUCING A MOLDING COMPOSITION THAT COMPRISES REACTING FORMALDEHYDE AND UREA IN AQUEOUS SOLUTION AND FORMING AN AQUEOUS SUSPENSION WHICH IS SUFFICIENTLY DILUTE TO BE SPRAYED AND WHICH COMPRISES SEVEN PARTS OF THE REACTION PRODUCT AND ONE TO SEVENTEEN PARTS OF A FINELY DIVIDED CELLULOSE FILLER, AND THEN SPRAYDRYING SAID SUSPENSION AT A PH OF 5 TO 7, THE DEGREE OF CONDENSATION OF THE REACTION PRODUCT IN THE SUSPENSION BEING SLIGHT ENOUGH SO THAT THE FINAL SPRAY-DRIED MOLDING COMPOSITION HAS A FLOW TIME OF NOT LESS THAN 5 NOR MORE THAN 20 SECONDS UNDER A PRESSURE OF 7,000 POUNDS PER SQUARE INCH IN STEEL CUP MOLD HEATED BY STEAM UNDER 60 POUNDS GAURGE PRESSURE.
Claim 2
Independent Claim
116 words
A METHOD OF PRODUCING A MOLDING COMPOSITION THAT COMPRISES REACTING FORMALDEHYDE AND UREA IN AQUEOUS SOLUTION AND FORMING AN AQUEOUS SUSPENSION WHICH IS SUFFICIENTLY DILUTE TO BE SPRAYED AND WHICH COMPRISES SEVEN PARTS OF THE REACTION PRODUCT AND ONE TO SEVENTEEN PARTS OF A FINELY DIVIDED CELLULOSE FILLER, AND THEN SPRAYDRYING SAID SUSPENSION AT A PH OF 5 TO 7, THE DEGREE OF CONDENSATION OF THE REACTION PRODUCT IN THE SUSPENSION BEING SLIGHT ENOUGH SO THAT THE FINAL SPRAY-DRIED MOLDING COMPOSITION HAS A FLOW TIME OF NOT LESS THAN 5 NOR MORE THAN 20 SECONDS UNDER A PRESSURE OF 7,000 POUNDS PER SQUARE INCH IN STEEL CUP MOLD HEATED BY STEAM UNDER 60 POUNDS GAURGE PRESSURE.
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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |