US2609733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of molding magnesia insulation material
Assignee: Johns Manville Corp
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Filing: 1945-10-26
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Granted: 1952-09-09
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Expires: 1965-10-26
Abstract
No abstract record available.
Inventors
- 👤 Roland W Honnig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:54
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/10; C04B28/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A METHOD OF MANUFACTURING MAGNESIA INSULATION BLOCKS WHICH COMPRISES, FORMING AN AQUEOUS SLURRY COMPRISING NORMAL MAGNESIUM CARBONATE CRYSTALS AND ASBESTOS FIBERS, SAID SLURRY HAVING A TEMPERATURE NOT EXCEEDING ABOUT 120* F., RAPIDLY DILUTING AND HEATING SAID SLURRY WITH HOT WATER AT A TEMPERATURE AND IN AMOUNT SUFFICIENT TO RAISE THE TEMPERATURE OF THE SLURRY TO 140-180* F., MAINTAINING THE THUS DILUTED AND HEATED SLURRY QUIESCENT FOR 2-30 MINUTES TO DEVELOP THEREIN VOLUMINOUS FLOCKS OF LIGHTLY BONDED INTERLACED CRYSTALS AND FIBERS, PARTIALLY DEWATERING AND MOLDING THE WET SOLIDS CONTENT OF SAID FLOCCULENT SLURRY UNDER PRESSURE, AND DEVELOPING A SHAPE RETAINING SET OF THE BLOCK BY HEATING.
Claim 2
Independent Claim
105 words
A METHOD OF MANUFACTURING MAGNESIA INSULATION BLOCKS WHICH COMPRISES, FORMING AN AQUEOUS SLURRY COMPRISING NORMAL MAGNESIUM CARBONATE CRYSTALS AND ASBESTOS FIBERS, SAID SLURRY HAVING A TEMPERATURE NOT EXCEEDING ABOUT 120* F., RAPIDLY DILUTING AND HEATING SAID SLURRY WITH HOT WATER AT A TEMPERATURE AND IN AMOUNT SUFFICIENT TO RAISE THE TEMPERATURE OF THE SLURRY TO 140-180* F., MAINTAINING THE THUS DILUTED AND HEATED SLURRY QUIESCENT FOR 2-30 MINUTES TO DEVELOP THEREIN VOLUMINOUS FLOCKS OF LIGHTLY BONDED INTERLACED CRYSTALS AND FIBERS, PARTIALLY DEWATERING AND MOLDING THE WET SOLIDS CONTENT OF SAID FLOCCULENT SLURRY UNDER PRESSURE, AND DEVELOPING A SHAPE RETAINING SET OF THE BLOCK BY HEATING.
References Cited (Backward Citations)
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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) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |