Patent US3260675A successfully refreshed from Google Patents.
US3260675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium and magnesium silicate phosphors with activator comprising terbium
Assignee: Philips North America LLC
•
Filing: 1964-07-01
•
Granted: 1966-07-12
•
Expires: 1984-07-01
Abstract
No abstract record available.
Inventors
- 👤 William A Mcallister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:11
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7743; C09K11/77492
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A SILICATE PHOSPHOR HAVING THE GENERAL FORMULATION X2SIO4:Z, WHEREIN X IS AT LEAST ONE MATRIX CONSTITUENT MATERIAL OF THE GROUO CONSISTING OF CALCIUM AND MAGNESIUM, AND Z PRINCIPALLY COMPRISES ACTIVATOR MATERIAL OF THE GROUP CONSISTING OF TERBIUM, TERBIUM PLUS LITHIUM AND TERBIUM PLUS LITHIUM PLUS MANGANESE.
Claim 2
Dependent Claim
46 words
A SILICATE PHOSPHOR HAVING THE GENERAL FORMULATION X2SIO4:Z, WHEREIN X IS AT LEAST ONE MATRIX CONSTITUENT MATERIAL OF THE GROUO CONSISTING OF CALCIUM AND MAGNESIUM, AND Z PRINCIPALLY COMPRISES ACTIVATOR MATERIAL OF THE GROUP CONSISTING OF TERBIUM, TERBIUM PLUS LITHIUM AND TERBIUM PLUS LITHIUM PLUS MANGANESE.
References Cited (Backward Citations)
US2297108A
Cited
GB572771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-11 | 1970-01-10 | 1970-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-11 | 1974-01-10 | 1974-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-11 | 1978-01-10 | 1978-07-12 | $7700.00 | Window Closed / Lapsed |