US2965786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calcium halophosphate phosphors
Assignee: GTE Sylvania Inc
•
Filing: 1959-04-30
•
Granted: 1960-12-20
•
Expires: 1979-04-30
Abstract
No abstract record available.
Inventors
- 👤 Michael A Aia
- 👤 Stanley M Poss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:16
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/72; C09K11/73
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A FLUORESCENT LAMP COMPRISING A SEALED ENVELOPE, ELECTRODES THEREIN, A FILLING OF ARGON AT LOW PRESSURE THEREIN, MERCURY THEREIN, AND A COATING OF PHOSPHOR ON THE INSIDE SURFACE OF SAID ENVELOPE, SAID PHOSPHOR COMPRISING CALCIUM HALOPHOSPHATE CONTAINING BETWEEN 0.01 AND 0.25 GRAM-ATOMS OF CADMIUM PER 3.00 GRAM-MOLES OF PHOSPHATE.
Claim 2
Dependent Claim
49 words
A FLUORESCENT LAMP COMPRISING A SEALED ENVELOPE, ELECTRODES THEREIN, A FILLING OF ARGON AT LOW PRESSURE THEREIN, MERCURY THEREIN, AND A COATING OF PHOSPHOR ON THE INSIDE SURFACE OF SAID ENVELOPE, SAID PHOSPHOR COMPRISING CALCIUM HALOPHOSPHATE CONTAINING BETWEEN 0.01 AND 0.25 GRAM-ATOMS OF CADMIUM PER 3.00 GRAM-MOLES OF PHOSPHATE.
References Cited (Backward Citations)
US2607014A
Cited
US2549355A
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US2579900A
Cited
US2714681A
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US2755254A
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US2772241A
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 |