US3841882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cladding glass compositions for light transmitting glass fibers
Assignee: Owens Corning
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Filing: 1972-10-16
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Granted: 1974-10-15
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Expires: 1992-10-16
Abstract
Abstract Cladding glass compositions are disclosed for use in producing light transmitting glass fibers. These fibers are composed of a central core glass surrounded by an outer cladding glass. The cladding glasses have the following range of proportions (by weight): SiO2, 58-65%; Al2O3, 8-10%; CaO, 0 to 4%; MgO, 0 to 2%; B2O3, 10-12%; Na2O, 13-15%; and Li2O, 2-3%.
Inventors
- 👤 W Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:06
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/04; C03C13/045; C03C13/046; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/076; C03C3/089; C03C3/091; C03C3/11; C03C3/112; C03C3/115; C03C3/118
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A LIGHT TRANSMITTING GLASS FIBER COMPRISING A CORE GLASS SURROUNDED BY A CLADDING GLASS, SAID SORE GLASS HAVING AN INDEX OF REFRACTION GREATER THAN SAID CLADDING GLASS, AND SAID CORE GLASS CONSISTING ESSENTIALLY BY WEIGHT OF:
Claim 2
Dependent Claim
36 words
A LIGHT TRANSMITTING GLASS FIBER COMPRISING A CORE GLASS SURROUNDED BY A CLADDING GLASS, SAID SORE GLASS HAVING AN INDEX OF REFRACTION GREATER THAN SAID CLADDING GLASS, AND SAID CORE GLASS CONSISTING ESSENTIALLY BY WEIGHT OF:
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |