US2662639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of magnetite from asbestos
Assignee: Raybestos Manhattan Inc
•
Filing: 1949-05-28
•
Granted: 1953-12-15
•
Expires: 1969-05-28
Abstract
No abstract record available.
Inventors
- 👤 Izador J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:35
CPC Classifications
B; B03; B03C; B03C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
THE METHOD OF TREATING CHRYSOTILE FIBROUS ASBESTOS AGGLOMERATES TO SEGREGATE THEREFROM NORMALLY OCCLUDED AND ENTANGLED ASSOCIATED MAGNETITE PARTICLE CONTENT WHICH COMPRISES, MIXING SAID ASBESTOS WITH AN AQUEOUS SOLUTION OF ORANGIC CHRYSOTILE ASBESTOS COLLOIDIZING AGENT EFFECTIVE TO (A) SUBDIVIDE THEM INTO FIBRILS OF COLLOIDAL SIZE AND TO SATURATE THE FIBRIL SURFACES WITH AN TO DEPOSIT THEREON AN ADSORBED LAYER OF SAID AGENT (B) AND TO COLLOIDALLY DISPERSE SAID SATURATED FIBRIS, AND THE SUBJECTING SAID DISPERSION AT A CONCENTRATION OF FROM ABOUT 0.1% TO ABOUT 1.0% BY WEIGHT OF ASBESTOS TO MAGNETIC SEPARATION TO WITHDRAW THE MAGNETIC PARTICLES THEREFROM.
Claim 2
Independent Claim
97 words
THE METHOD OF TREATING CHRYSOTILE FIBROUS ASBESTOS AGGLOMERATES TO SEGREGATE THEREFROM NORMALLY OCCLUDED AND ENTANGLED ASSOCIATED MAGNETITE PARTICLE CONTENT WHICH COMPRISES, MIXING SAID ASBESTOS WITH AN AQUEOUS SOLUTION OF ORANGIC CHRYSOTILE ASBESTOS COLLOIDIZING AGENT EFFECTIVE TO (A) SUBDIVIDE THEM INTO FIBRILS OF COLLOIDAL SIZE AND TO SATURATE THE FIBRIL SURFACES WITH AN TO DEPOSIT THEREON AN ADSORBED LAYER OF SAID AGENT (B) AND TO COLLOIDALLY DISPERSE SAID SATURATED FIBRIS, AND THE SUBJECTING SAID DISPERSION AT A CONCENTRATION OF FROM ABOUT 0.1% TO ABOUT 1.0% BY WEIGHT OF ASBESTOS TO MAGNETIC SEPARATION TO WITHDRAW THE MAGNETIC PARTICLES THEREFROM.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |