Patent US3700516A successfully refreshed from Google Patents.
US3700516A
Expired / Lapsed
US
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Method of making cellular plastic building panel
Assignee: Camelot Stone Inc
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Filing: 1970-12-29
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Granted: 1972-10-24
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Expires: 1990-12-29
Abstract
Abstract A method for producing decorative building panels for use in both exterior and interior construction. The panels have an insulating cellular plastic core with a cement veneer permanently bonded to the core. The exposed veneer surface of the panel can be of any desired shape or color to simulate brick, stone, etc., and is produced by making an impression in a bed of dry cement and allowing liquid plastic to solidify in the molds thus formed. The liquid plastic will form a solid core with a thin veneer of the dry cement impregnated to it, the veneered surface having the shape of the initial impression made.
Inventors
- 👤 Wayne S Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:28
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/1209; B29C44/34; B29C44/56; B29C44/5618; E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; E04C2/30; E04C2/32; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |