US3554861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant fibrous asbestos board with composite binder
Assignee: Panacon Corp
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Filing: 1967-07-06
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Granted: 1971-01-12
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Expires: 1987-07-06
Abstract
Abstract AN ASBESTOS MILLBORAD PARTICULARLY ADAPTED FOR USE UNDER HIGH TEMPERATURE CONDITIONS COMPOSED OF ASBESTOS FIBERS OF WHICH AT LEAST 30 PERCENT ARE CROCIDOLITE BLUE ASBESTOS, THE REMAINDER BEING CHRYSOTILE ASBESTOS, AND WHEREIN A COMPOSSITE BINDER IS USED, THE BINDER BEING COMPOSED OF STARCH AND BENTONITE CLAY. THE BENTONITE CLAY IS A PERMANENT BINDER AND THE STARCH A TEMPORARY BINDER, SAID STARCH DECOMPOSING WHEN THE MILLBOARD IS USED AT HIGH TEMPERATURES THEREBY LEAVING SPACE FOR THE EXPANSION OF THE ASBESTOS TO ELIMINATE CRACKING OF SAID MILLBOARD.
Inventors
- 👤 Eugene D Ermene
- 👤 Marion F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:05
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/001
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |