US3294699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminescent europium activated strontium aluminate
Assignee: Osram GmbH
•
Filing: 1963-01-30
•
Granted: 1966-12-27
•
Expires: 1983-01-30
Abstract
No abstract record available.
Inventors
- 👤 Lange Horst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:14
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/77; C09K11/7728; C09K11/7734
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
AN ARTIFICIAL LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF STRONTIUM ALUMINATE ACTIVATED WITH EUROPIUM (II) OXIDE.
Claim 2
Dependent Claim
14 words
AN ARTIFICIAL LUMINESCENT MATERIAL CONSISTING ESSENTIALLY OF STRONTIUM ALUMINATE ACTIVATED WITH EUROPIUM (II) OXIDE.
References Cited (Backward Citations)
US2392814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |