Patent US2494259A successfully refreshed from Google Patents.
US2494259A
Expired / Lapsed
US
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Fibrous glass articles
Assignee: Corning Glass Works
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Filing: 1946-03-20
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Granted: 1950-01-10
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Expires: 1966-03-20
Abstract
No abstract record available.
Inventors
- 👤 Nordberg Martin Emery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:49
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/005; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
AN ARTICLE COMPRISING GLASS FIBRES WHICH HAVE A DIAMETER LESS THAN .001 INCH AND WHICH CONSISTS ESSENTIALLY OF AT LEAST 88% SIO2, THE INDICATED AMOUNT OF AT LEAST ONE GLASS FLUX SELECTED FROM THE GROUP CONSISTING OF UP TO 1% ALKALI METAL OXIDE AND UP TO 4% B2O3, AND AT LEAST ONE ADDITIONAL GLASS-FORMING OXIDE IN THE INDICATED AMOUNT SELECTED FROM THE CLASS CONSISTING OF UP TO 10% BEO, UP TO 10% MGO, UP TO 10% CAO, UP TO 10% ZNO, UP TO 10% SRO, UP TO 10% CDO, UP TO 10% BAO, UP TO 4% AL2O3, UP TO 12% TIO2, UP TO 12% ZRO2 AND UP TO 12% THO2, THE FIBRES BEING POROUS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |