US3770859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Building materials
Assignee: Bevan Ass C G
•
Filing: 1971-06-29
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Granted: 1973-11-06
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Expires: 1991-06-29
Abstract
Abstract A method of making building products, primarily panels, which products have at least one bore extending therethrough wherein a substantially dry measure of a liquid setting powder and a fibrous constituent is introduced to a mould having bore-forming means therein, the mixture is compacted and the bore-forming means withdrawn, then liquid for setting the powder is allowed to seep through the mixture with said at least one bore serving as flow path means for facilitating flow of the liquid through the mixture.
Inventors
- 👤 C Bevan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:05
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/52; B28B1/521; Y; Y10; Y10S; Y10S264/00; Y10S264/43
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |