US4499142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Faced masonry units and facing composition therefor
Assignee: Trenwyth Industries Inc
•
Filing: 1983-03-31
•
Granted: 1985-02-12
•
Expires: 2003-03-31
Abstract
Abstract An unsaturated polyester resinous filled facing composition for use on masonry units such as concrete building blocks having improved flame spread retardance and low smoke production ratings, in addition to superior chemical, stain and water resistance. Isophthalic neopentyl glycol polyester is used and dimethyl methyl phosphonate is incorporated to provide the improved flame and smoke suppression.
Inventors
- 👤 Alan C. Kingston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:06
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B26/00; C04B26/02; C04B26/10; C04B26/18; C04B41/45; C04B41/46; C04B41/48; C04B41/4826; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/25; Y10T428/259; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31786; Y10T428/31855
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
A faced masonry unit of the type including a masonry block and a decorative durable facing on at least one surface thereof, the facing being of a composition comprising; a silane surface-treated sand filler in a range of about 60 to 90% of the total weight of the facing composition, an isophthalic neopentyl glycol polyester in a range of about 10 to 40% of the total weight of the facing composition, styrene and methyl methacrylate monomers together with a range of about 5 to 15% of the weight of the total facing composition, alumina trihydrate at least 2% by weight of the total facing composition, and dimethyl methyl phosphonate incorporated into the composition in an amount sufficient to impart permanent flame and smoke suppression to the facing.
Claim 2
Dependent Claim
127 words
A faced masonry unit of the type including a masonry block and a decorative durable facing on at least one surface thereof, the facing being of a composition comprising; a silane surface-treated sand filler in a range of about 60 to 90% of the total weight of the facing composition, an isophthalic neopentyl glycol polyester in a range of about 10 to 40% of the total weight of the facing composition, styrene and methyl methacrylate monomers together with a range of about 5 to 15% of the weight of the total facing composition, alumina trihydrate at least 2% by weight of the total facing composition, and dimethyl methyl phosphonate incorporated into the composition in an amount sufficient to impart permanent flame and smoke suppression to the facing.
Claim 3
Dependent Claim
32 words
A faced masonry unit as defined in claim 1, wherein the composition includes the dimethyl methyl phosphonate in a range between 0.7 and 2% of the total weight of the facing composition.
Claim 4
Dependent Claim
24 words
A faced masonry unit as in claim 2, wherein the dimethyl methyl phosphonate is about 1% of the total weight of the facing composition.
Claim 5
Dependent Claim
27 words
A facing composition as in claim 2, wherein the alumina trihydrate is between about 2 and 5% by weight of the total weight of the facing composition.
Claim 6
Dependent Claim
29 words
A faced masonry unit as defined in claim 2, wherein the methyl methacrylate is about 25 to 50% by weight of the combined weight of styrene and methyl methacrylate.
Claim 7
Dependent Claim
25 words
A faced masonry unit as in claim 1, wherein the facing is bonded to the surface of the masonry unit during baking in an oven.
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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |