Patent US2648641A successfully refreshed from Google Patents.
US2648641A
Expired / Lapsed
US
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Fire retardant coating containing a carbohydrate, urea or melamineformaldehyde and dicyandiamide or melamine
Assignee: Fir-Tex Insulating Board Co
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Filing: 1950-08-03
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Granted: 1953-08-11
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Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 John E Robison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:37
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/18; C09D5/185; Y; Y10; Y10S; Y10S260/00; Y10S260/47
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
A FIRE RETARDANT, WASHABLE, INTUMESCENT COATING COMPOSITION OF THE CHARACTER DESCRIBED INCLUDING A REACTED AMINOPLAST-ALDEHYDE RESIN SELECTED FROM THE GROUP CONSISTING OF UREA-FORMALDEHYDE RESIN AND MELAMINE FORMALDEHYDE RESIN, AN AMIDO COMPOUND SELECTED FROM THE GROUP CONSISTING OF MELAMINE AND DICYANDIAMIDE, AND A CARBOHYDRATE AS THE ACTIVE INGREDIENTS, THE SAID ACTIVE INGREDIENTS BEING APPROXIMATELY IN THE RELATIVE RATIO OF 1:2:1 RESPECTIVELY, AND SAID ACTIVE INGREDIENTS CARRIED IN A SOLVENT.
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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |