Patent US3012930A successfully refreshed from Google Patents.
US3012930A
Expired / Lapsed
US
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Method of wet felting and leaching mineral fibers and resultant felted product
Assignee: Johns Manville Fiber Glass Inc
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Filing: 1956-09-24
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Granted: 1961-12-12
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Expires: 1976-09-24
Abstract
No abstract record available.
Inventors
- 👤 Labino Dominick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:24
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A METHOD OF FORMING A TEMPERATURE-RESISTANT MAT, COMPRISING MIXING GLASS FIBERS HAVING AN AVERAGE DIAMETER OF LESS THAN ABOUT 1 MICRON IN A LIQUID TO FORM A SUSPENSION OF SAID FIBERS, WET-FELTING SAID SUSPENDED FIBERS INTO A COMPACTED MAT ON A FORAMINOUS SURFACE, AND WHILE SO FELTING PASSING A LEACHING SOLUTION THROUGH THE FELTED MAT TO REMOVE LEACHABLE GLASS FORMING OXIDES FROM THE FIBERS, AND THEREAFTER DRYING THE MAT.
Claim 2
Independent Claim
69 words
A METHOD OF FORMING A TEMPERATURE-RESISTANT MAT, COMPRISING MIXING GLASS FIBERS HAVING AN AVERAGE DIAMETER OF LESS THAN ABOUT 1 MICRON IN A LIQUID TO FORM A SUSPENSION OF SAID FIBERS, WET-FELTING SAID SUSPENDED FIBERS INTO A COMPACTED MAT ON A FORAMINOUS SURFACE, AND WHILE SO FELTING PASSING A LEACHING SOLUTION THROUGH THE FELTED MAT TO REMOVE LEACHABLE GLASS FORMING OXIDES FROM THE FIBERS, AND THEREAFTER DRYING THE MAT.
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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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |