US3173831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving the filtration characteristics of asbestos
Assignee: Johns Manville Corp
•
Filing: 1961-12-29
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Granted: 1965-03-16
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Expires: 1981-12-29
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Pundsack
- 👤 George P Reimschussel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:22
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/1055; B; B01; B01D; B01D39/00; B01D39/02; B01D39/06; B01D39/14; B01D39/20; B01D39/2068; B01D39/2082; B01D39/2086; C04B20/1077; C04B28/00; C04B28/02; C04B28/24; C04B28/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF MANUFACTURING ASBESTOS-CEMENT ARTICLES WHICH COMPRISES APPLYING AN ATOMIZED SPRAY OF AQUEOUS SOLUTION OF ALKALI METAL SILICATE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATES AND MIXTURES THEREOF TO AN AIR SUSPENSION OF ASBESTOS FIBER AND DEPOSITING THEREON ALKALI METAL SILICATE SOLIDS IN AMOUNT OF APPROXIMATELY 0.10 TO 4% BY WEIGHT LOF THE ASBESTOS FIBER, DISPERSING THE SILICATE-CONTAINING FIBER IN A DILUTE AQUEOUS FEED SLURRY COMPRISING HYDRAULIC CEMENT, COLLECTING AND WITHDRAWING A WET LAYER COMPRISING ABESTOS FIBER AND CEMENT FROM THE SAID SLURRY.
Claim 2
Independent Claim
87 words
THE METHOD OF MANUFACTURING ASBESTOS-CEMENT ARTICLES WHICH COMPRISES APPLYING AN ATOMIZED SPRAY OF AQUEOUS SOLUTION OF ALKALI METAL SILICATE SELECTED FROM THE GROUP CONSISTING OF SODIUM AND POTASSIUM SILICATES AND MIXTURES THEREOF TO AN AIR SUSPENSION OF ASBESTOS FIBER AND DEPOSITING THEREON ALKALI METAL SILICATE SOLIDS IN AMOUNT OF APPROXIMATELY 0.10 TO 4% BY WEIGHT LOF THE ASBESTOS FIBER, DISPERSING THE SILICATE-CONTAINING FIBER IN A DILUTE AQUEOUS FEED SLURRY COMPRISING HYDRAULIC CEMENT, COLLECTING AND WITHDRAWING A WET LAYER COMPRISING ABESTOS FIBER AND CEMENT FROM THE SAID SLURRY.
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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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |