US3855144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent device, process, composition, and article
Assignee: Techneglas LLC
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Filing: 1971-11-30
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Granted: 1974-12-17
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Expires: 1991-11-30
Abstract
Abstract This disclosure relates to a luminescent device having a uniformly coalesced, transparent, luminescent silica glass target containing an activating amount of at least one selected rare earth oxide. This disclosure further relates to a luminescent process, a composition, and an article of manufacture.
Inventors
- 👤 S Barber
- 👤 W Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:12
CPC Classifications
C; C03; C03C; C03C3/00; C03C3/04; C03C3/06; C03C13/00; C03C4/00; C03C4/12; C03C2201/00; C03C2201/06; C03C2201/30; C03C2201/34; C03C2203/00; C03C2203/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
A SUBSTANTIALLY TRANSPARENT HOMOGENOUS LUMINESCENT GLASS CONSISTING ESSENTIALLY OF SILICA AND OXIDES OF THE RATE EARTHS EUROPIUM AND TERBIUM WHEREIN THE TOTAL NUMBER OF SUCH RRARE EARTH ATOMS PER MILLION SILICON ATOMS IS FROM 10 TO 5,00 SM
Claim 2
Dependent Claim
38 words
A SUBSTANTIALLY TRANSPARENT HOMOGENOUS LUMINESCENT GLASS CONSISTING ESSENTIALLY OF SILICA AND OXIDES OF THE RATE EARTHS EUROPIUM AND TERBIUM WHEREIN THE TOTAL NUMBER OF SUCH RRARE EARTH ATOMS PER MILLION SILICON ATOMS IS FROM 10 TO 5,00 SM
Claim 3
Dependent Claim
71 words
A substantially transparent, homogeneous, luminescent glass consisting essentially of silica and oxides of the rare earths europium and lutetium wherein the total number of such rare earth atoms per million silicon atoms is from 10 to 5,000, and the number of each of said rare earth atoms per million silicon atoms is at least five, said silica glass, exclusive of said rare earth oxides, being at least 99 weight percent silica.
Claim 4
Dependent Claim
71 words
A substantially transparent, homogeneous, luminescent glass consisting essentially of silica and oxides of the rare earths europium and lutetium wherein the total number of such rare earth atoms per million silicon atoms is from 10 to 5,000, and the number of each of said rare earth atoms per million silicon atoms is at least five, said silica glass, exclusive of said rare earth oxides, being at least 99 weight percent silica.
Claim 5
Dependent Claim
71 words
A substantially transparent, homogeneous, luminescent glass cconsisting essentially of silica and oxides of the rare earths praseodymium and gadolinium, wherein the total number of such rare earth atoms per million silicon atoms is from 10 to 5,000, and the number of each of said rare earth atoms per million silicon atoms is at least five, said silica glass, exclusive of said rare earth oxides, being at least 99 weight percent silica.
Claim 6
Dependent Claim
71 words
A substantially transparent, homogeneous, luminescent glass cconsisting essentially of silica and oxides of the rare earths praseodymium and gadolinium, wherein the total number of such rare earth atoms per million silicon atoms is from 10 to 5,000, and the number of each of said rare earth atoms per million silicon atoms is at least five, said silica glass, exclusive of said rare earth oxides, being at least 99 weight percent silica.
References Cited (Backward Citations)
US2099602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |