Patent US3136183A successfully refreshed from Google Patents.
US3661601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Opal glass compositions
Assignee: Corning Glass Works
•
Filing: 1969-03-21
•
Granted: 1972-05-09
•
Expires: 1989-03-21
Abstract
Abstract This invention relates to spontaneously opacifiable glasses containing fluorine and having as the principal opacifying phase an immiscible, or insoluble, fluorine containing glass; the opal is an alkali aluminosilicate glass with additions of divalent oxides, fluorine, and boric-oxide. These glasses are opacified by cooling the glass body from the melt to a temperature below about the opal liquidus thereof at a rate greater than about 2* C./minute so as to homogeneously separate an insoluble glassy opacifying phase.
Inventors
- 👤 William H Dumbaugh
- 👤 James E Flannery
- 👤 George B Hares
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:01
CPC Classifications
C; C03; C03C; C03C8/00; C03C8/02; C03C8/06; C03B; C03B17/00; C03B17/02; C03B23/00; C03B23/02; C03B23/023; C03B23/025; C03C1/00; C03C1/04; C03C17/00; C03C17/02; C03C3/00; C03C3/04; C03C3/076; C03C3/089; C03C3/091; C03C3/11; C03C3/112; C03C3/115; C03C4/00; C03C4/005; C03C2204/00; C03C2204/04; C03C2218/00; C03C2218/10; C03C2218/13; C03C2218/30; C03C2218/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
The glass as recited in claim 1 wherein said glass contains from about 0 to 10 percent total of at least one compound selected from the group consisting of BaO, SrO, P2O5, La2O3, TiO2, Nb2O5, ZnO, GeO2, PbO, Bi2O3, and CeO2.
Claim 2
Dependent Claim
45 words
The glass as recited in claim 1 wherein said glass also conTains from about 0 to 5 percent total of at least one oxide containing coloring ion selected from the group consisting of Cr, Mn, Fe, Co, Cu, V, Ni, U, and the rare earths.
References Cited (Backward Citations)
US2394502A
Cited
FR1104363A
Cited
US2882173A
Cited
US3413133A
Cited
GB1016640A
Cited
US3384508A
Cited
US3459574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |