US2813046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame resistant fiberboard
Assignee: Individual
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Filing: 1955-08-01
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Granted: 1957-11-12
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Expires: 1975-08-01
Abstract
No abstract record available.
Inventors
- 👤 Edgar A Lauring
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:19
CPC Classifications
D; D21; D21J; D21J1/00; D21J1/08; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/3187; Y10T428/31873; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/31971; Y10T428/31975; Y10T428/31978
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A COMBUSTIBLE BUILDING MATERIAL COATED WITH AN INTUMESCENT WHICH INCLUDES CARBOHYDRATE AND A FILM FORMING POLYMER LATEX IN APPROXIMATELY THE SAME AMOUNTS, SAID POLYMER LATEX IN THE INTUMESCENT COATING NOT EXCEEDING 20 TO 25% OF THE POLYMER LATEX CONTAINED IN AN OUTER COATING, AN OUTER COATING OF POLYMER LATEX AND UREA FORMALDEHYDE RESIN, THE SAID POLYMER LATEX AND UREA FORMALDEHYDE RESIN BEING PRESENT IN SUBSTANTIALLY EQUAL AMOUNTS IN THE OUTER COATING.
Claim 2
Dependent Claim
71 words
A COMBUSTIBLE BUILDING MATERIAL COATED WITH AN INTUMESCENT WHICH INCLUDES CARBOHYDRATE AND A FILM FORMING POLYMER LATEX IN APPROXIMATELY THE SAME AMOUNTS, SAID POLYMER LATEX IN THE INTUMESCENT COATING NOT EXCEEDING 20 TO 25% OF THE POLYMER LATEX CONTAINED IN AN OUTER COATING, AN OUTER COATING OF POLYMER LATEX AND UREA FORMALDEHYDE RESIN, THE SAID POLYMER LATEX AND UREA FORMALDEHYDE RESIN BEING PRESENT IN SUBSTANTIALLY EQUAL AMOUNTS IN THE OUTER COATING.
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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |