Patent US3758220A successfully refreshed from Google Patents.
Patent US4026478A successfully refreshed from Google Patents.
US4026478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making uniform short non-cellulosic fibers
Assignee: SLOSS INDUSTRIES Corp A CORP OF
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Filing: 1975-04-03
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Granted: 1977-05-31
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Expires: 1995-04-03
Abstract
Abstract The present invention concerns a novel method of making short inorganic glass fibers and mineral wool fibers with a very low shot content and the fibers thus produced.
Inventors
- 👤 Frank D. Albert
- 👤 Alan P. Conroy
- 👤 David L. Skinner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:43
CPC Classifications
C; C03; C03B; C03B37/00; C03B37/01; C03B37/04; C03B37/05; C03B37/055; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962; Y10T428/2964
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
The method of producing inorganic fibers within a preselected narrow range of aspect ratios from about 30 to about 140 comprising the steps of making a mass of individual, inorganic fibers having diameters within a prescribed range and having a range of aspect ratios substantially from 10 3 to 10 6 , said mass further having not less than about 7% shot by weight; putting said mass of fibers through a refiner, said refiner having at least one rotating plate element and a second plate element at a fixed distance from and in facing relation to said one rotating element to reduce the length of said fibers, said fixed distance being substantially less than the lengths of a major quantity of said fibers and greater than the size of said shot and subjecting said refined fibers to the action of a separator whereby fibers with said preselected narrow range of aspect ratios are produced with less than 1% shot.
Claim 2
Independent Claim
159 words
The method of producing inorganic fibers within a preselected narrow range of aspect ratios from about 30 to about 140 comprising the steps of making a mass of individual, inorganic fibers having diameters within a prescribed range and having a range of aspect ratios substantially from 10 3 to 10 6 , said mass further having not less than about 7% shot by weight; putting said mass of fibers through a refiner, said refiner having at least one rotating plate element and a second plate element at a fixed distance from and in facing relation to said one rotating element to reduce the length of said fibers, said fixed distance being substantially less than the lengths of a major quantity of said fibers and greater than the size of said shot and subjecting said refined fibers to the action of a separator whereby fibers with said preselected narrow range of aspect ratios are produced with less than 1% shot.
Claim 3
Dependent Claim
34 words
The method of producing inorganic fibers having a preselected range of aspect ratios comprising the steps set forth in claim 1 in which said mass of fibers is moved in a generally spiral path.
Claim 4
Dependent Claim
40 words
The method of producing inorganic fibers having a preselected range of aspect ratios comprising the steps set forth in claim 2, and the step of applying a forward linear force component to said fibers simultaneously with said spiral path movement.
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) | 1980-05-30 | 1980-11-29 | 1981-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-30 | 1984-11-29 | 1985-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-30 | 1988-11-29 | 1989-05-31 | $7700.00 | Window Closed / Lapsed |