Patent US2919221A successfully refreshed from Google Patents.
US2919221A
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Method for making glass paper
Assignee: LOF GLASS FIBERS CO
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Filing: 1956-01-13
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Granted: 1959-12-29
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Expires: 1976-01-13
Abstract
No abstract record available.
Inventors
- 👤 Labino Dominick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:36
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/40; H; H01; H01M; H01M50/00; H01M50/40; H01M50/409; H01M50/44; D21H17/00; D21H17/63; D21H17/65; D21H21/00; D21H21/14; D21H21/18; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
98 words
A METHOD OF MAKING GLASS PAPER COMPRISING, BLASTING PRIMARY FIBERS OF GLASS OF AN ALKALI CONTENT BETWEEN ABOUT 1/2 AND 20% INTO FIBERS OF A LENGTH IN THE RANGE BETWEEN 1/8 AND 3/8 INCH, SAID FIBERS HAVING A UNIFORMITY OF DIAMETER OF ABOUT *0.45 MICRON AND A DIAMETER NOT GREATER THAN ONE MICRON, MIXING SAID FIBERS IN AN AQUEOUS CARRIER HAVING A PH IN THE RANGE FROM 2 TO 6 AND VARYING THE PH INVERSELY PROPORTIONAL TO THE ALKALI CONTENT OF THE GLASS, FELTING SAID DISPERSION INTO A LAYER OF INTERLOCKED FIBERS, AND REMOVING WATER FROM SAID LAYER.
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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) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |