US3861925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali-resistant, zirconia-free, fiberizable glass compositions
Assignee: Owens Corning
•
Filing: 1973-02-12
•
Granted: 1975-01-21
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Expires: 1993-02-12
Abstract
Abstract Alkali resistant, fiberizable glass compositions are disclosed. These compositions contain TiO2, La203 or CeO2. The glass fibers formed from these compositions are useful in the reinforcement of cementitious materials.
Inventors
- 👤 Warren W Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:08
CPC Classifications
C; C03; C03C; C03C13/00; C03C13/001; C03C3/00; C03C3/04; C03C3/076; C03C3/078; C03C3/095
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
15 words
The fiberizable glass composition of claim 1, wherein the mole percent of each ingredient is:
Claim 2
Dependent Claim
9 words
Alkali resistant, zirconia free, glass fibers consisting essentially of:
Claim 3
Dependent Claim
14 words
The glass fibers of claim 3 wherein the mole percent of each ingredient is:
References Cited (Backward Citations)
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Cited
US2640784A
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US3480536A
Cited
US3385915A
Cited
US3573078A
Cited
US3783092A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |