US3262767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing vitreous silica fibers
Assignee: BP Chemicals Hitco Inc
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Filing: 1960-08-22
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Granted: 1966-07-26
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Eugene C S Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:15
CPC Classifications
C; C03; C03C; C03C25/00; C03C25/66; C03C25/68; C03C13/00; C03C13/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A METHOD OF PREPARING IMPROVED VITREOUS SILICA FIBERS HAVING INCREASED BREAKING STRENGTH, DRAPABILITY, HAND RESISTANCE TO ABRASON AND DECREASED BRITTLENESS, WHICH METHOD COMPRISES UNIFORMLY DISPERSING SILIC PARTICLES HAVING A PARTICLE SIZE OF UP TO 44 MICRONS ON FIBERS DURING CONVERSION OF SAID FIBERS FROM GLASS FIBERS TO VITREOUS SILICA FIBERS, AND THEREAFTER FIRING SAID FIBERS TO SHRINK THE SAME.
Claim 2
Independent Claim
59 words
A METHOD OF PREPARING IMPROVED VITREOUS SILICA FIBERS HAVING INCREASED BREAKING STRENGTH, DRAPABILITY, HAND RESISTANCE TO ABRASON AND DECREASED BRITTLENESS, WHICH METHOD COMPRISES UNIFORMLY DISPERSING SILIC PARTICLES HAVING A PARTICLE SIZE OF UP TO 44 MICRONS ON FIBERS DURING CONVERSION OF SAID FIBERS FROM GLASS FIBERS TO VITREOUS SILICA FIBERS, AND THEREAFTER FIRING SAID FIBERS TO SHRINK THE SAME.
References Cited (Backward Citations)
GB312054A
Cited
US2118386A
Cited
US2494259A
Cited
GB637401A
Cited
US2493984A
Cited
US2526870A
Cited
US2635390A
Cited
US2843461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |