US3582460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improving the freeness of asbestos by treatment with silica sol
Assignee: Asbestos Corp Ltd
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Filing: 1970-02-20
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Granted: 1971-06-01
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Expires: 1990-02-20
Abstract
Abstract ASBESTOS FIBERS ARE TREATED, AS DESCRIBED, WITH AQUEOUS SILICA SOLS, THEN DRIED. THE TREATMENT GREATLY INCREASES THE FREENESS OF THE FIBERS AND IS A VALUABLE HELP IN FILTERING COMPOSITIONS CONTAINING ASBESTOS.
Inventors
- 👤 Solomon George Lipsett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:13
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/02; B01D39/06; C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |