US3823019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine wall coating
Assignee: United States Department of the Interior
•
Filing: 1972-09-06
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Granted: 1974-07-09
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Expires: 1992-09-06
Abstract
Abstract A MINE WALL COATING COMPOSITION IS COMPOUNDED FROM ELEMENTAL SULFUR, DICYCLOPHETADIENE, GLASS FIBER AND TALC. THIS COMPOSITION IS APPLIED TO MINE WALLS BY SPRAYING A MOLTEN MIXTURE OF THE COMPOSITION AT ELEVATED TEMPERATURE. PREFERABLY, THE COMPOSITION IS ALLOWED TO AGE AT ELEVATED TEMPERATURE PRIOR TO SPRAYING TO PERMIT REACTION BETWEEN THE SULFUR AND THE DICYCLOPENTADIENE.
Inventors
- 👤 J Dale
- 👤 A Ludwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:34
CPC Classifications
E; E21; E21D; E21D11/00; C; C04; C04B; C04B28/00; C04B28/36; C04B2111/00; C04B2111/00474; C04B2111/00482; Y; Y10; Y10S; Y10S106/00; Y10S106/90
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |