US2965785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrophosphate phosphor
Assignee: GTE Sylvania Inc
•
Filing: 1958-02-21
•
Granted: 1960-12-20
•
Expires: 1978-02-21
Abstract
No abstract record available.
Inventors
- 👤 Richard C Ropp
- 👤 Richard W Mooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:12
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A PYROPHOSPHATE PHOSPHOR OF A METAL SELECTED FROM THE GROUP CONSISTING OF STRONTIUM AND STRONTIUM PLUS BARIUM, STRONTIUM PLUS MAGNESIUM, STRONTIUM PLUS ZINC, STRONTIUM PLUS CADMIUM, STRONTIUM PLUS ALUMINUM, SAID PHOSPHOR BEING ACTIVATED BY TIN, A SUBSTANTIAL PART OF WHICH IS IN THE STANNOUS STATE, AND IN WHICH THE NUMBER OF GRAM-ATOMS OF STRONTIUM, PLUS THE NUMBER OF GRAM-
Claim 2
Dependent Claim
59 words
A PYROPHOSPHATE PHOSPHOR OF A METAL SELECTED FROM THE GROUP CONSISTING OF STRONTIUM AND STRONTIUM PLUS BARIUM, STRONTIUM PLUS MAGNESIUM, STRONTIUM PLUS ZINC, STRONTIUM PLUS CADMIUM, STRONTIUM PLUS ALUMINUM, SAID PHOSPHOR BEING ACTIVATED BY TIN, A SUBSTANTIAL PART OF WHICH IS IN THE STANNOUS STATE, AND IN WHICH THE NUMBER OF GRAM-ATOMS OF STRONTIUM, PLUS THE NUMBER OF GRAM-
References Cited (Backward Citations)
US2339178A
Cited
US2709766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |