US3092531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making essentially pure silica fiber bats
Assignee: Johns Manville Fiber Glass Inc
•
Filing: 1956-02-01
•
Granted: 1963-06-04
•
Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Labino Dominick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:34
CPC Classifications
D; D04; D04H; D04H1/00; C; C04; C04B; C04B30/00; C04B30/02; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR PRODUCING A FIBROUS BAT OF SUBSTANTIALLY PURE SILICA, COMPRISNG FORMING A COMPACTED BAT OF SILICEOUS FIBERS CONSISTING ESSENTIALLY OF SILICA AND AN ALKALI METAL OXIDE, THE RATIO OF SILICA TO SAID ALKALI METAL OXIDE BEING IN THE ORDER OF ABOUT 4:1 AND SAID FIBERS HAVING A DIAMETER LESS THAN 2 1/2 MICRONS, AND FLOWING AN AQUEOUS LEACHING SOLUTION THROUGH SAID BAT OF FIBERS UNTIL SUBSTANTIALLY ALL OF THE ALKALI IS EXTRACTED THEREFROM.
Claim 2
Dependent Claim
75 words
A PROCESS FOR PRODUCING A FIBROUS BAT OF SUBSTANTIALLY PURE SILICA, COMPRISNG FORMING A COMPACTED BAT OF SILICEOUS FIBERS CONSISTING ESSENTIALLY OF SILICA AND AN ALKALI METAL OXIDE, THE RATIO OF SILICA TO SAID ALKALI METAL OXIDE BEING IN THE ORDER OF ABOUT 4:1 AND SAID FIBERS HAVING A DIAMETER LESS THAN 2 1/2 MICRONS, AND FLOWING AN AQUEOUS LEACHING SOLUTION THROUGH SAID BAT OF FIBERS UNTIL SUBSTANTIALLY ALL OF THE ALKALI IS EXTRACTED THEREFROM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |