US3012930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of wet felting and leaching mineral fibers and resultant felted product
Assignee: Johns Manville Fiber Glass Inc
•
Filing: 1956-09-24
•
Granted: 1961-12-12
•
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 13:05
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.
References Cited (Backward Citations)
US2643487A
Cited
US2461841A
Cited
US2441390A
Cited
US2491761A
Cited
US2500092A
Cited
US2624658A
Cited
US2635390A
Cited
US2686954A
Cited
US2730475A
Cited
US2787542A
Cited
US2919221A
Cited
US2718461A
Cited
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 |