US3231525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing urea-formaldehyde foams and reducing the formaldehyde odor from said foam
Assignee: Honeywell International Inc
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Filing: 1962-08-21
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Granted: 1966-01-25
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Expires: 1982-08-21
Abstract
No abstract record available.
Inventors
- 👤 Fred L Kelly
- 👤 Rodney L Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:09
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/30; C08J2361/00; C08J2361/20; C08J2361/22; C08J2361/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS FOR PREPARING A SOLID UREA-FORMALDEHYDE FOAM BY MIXING A PARTIALLY RESINIFIED AQUEOUS UREAFORMALDEHYDE RESIN SOLUTION WITH AN AQUEOUS ACIDIC FOAM PREPARED BY FOAMING AN ACIDIC HARDENER SOLUTION OF A SURFACTANT, THE STEP WHICH COMPRISES ADDING TO SAID ACIDIC HARDENER SOLUTION PRIOR TO MIXING WITH SAID RESIN SOLUTION AT LEAST 4% BY WEIGHT, BASED ON THE ACIDIC HARDENER SOLUTION, OF UREA TO SUBSTANTIALLY ELIMINATE FORMALDEHYDE ODOR IN THE SOLID-UREA-FORMALDEHYDE FOAM.
Claim 2
Dependent Claim
72 words
IN A PROCESS FOR PREPARING A SOLID UREA-FORMALDEHYDE FOAM BY MIXING A PARTIALLY RESINIFIED AQUEOUS UREAFORMALDEHYDE RESIN SOLUTION WITH AN AQUEOUS ACIDIC FOAM PREPARED BY FOAMING AN ACIDIC HARDENER SOLUTION OF A SURFACTANT, THE STEP WHICH COMPRISES ADDING TO SAID ACIDIC HARDENER SOLUTION PRIOR TO MIXING WITH SAID RESIN SOLUTION AT LEAST 4% BY WEIGHT, BASED ON THE ACIDIC HARDENER SOLUTION, OF UREA TO SUBSTANTIALLY ELIMINATE FORMALDEHYDE ODOR IN THE SOLID-UREA-FORMALDEHYDE FOAM.
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) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |