US3068067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing luminescent grade dibasic calcium phosphate
Assignee: GTE Sylvania Inc
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Filing: 1960-05-20
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Granted: 1962-12-11
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Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Michael A Aia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:32
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE PROCESS OF PREPARING LUMINESCENT GRADE DIBASIC ALKALINE-EARTH PHOSPHATES, SAID PROCESS COMPRISING ADDING A SLOUTION OF A SALT, SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES AND NITRATES OF AN ALKALINE-EARTH METAL SELECTED FROM THE GROUP CONSISTING OF BARIUM STRONTIUM AND CALCIUM TO A SOLUTION OF MONO-AMMONIUM PHOSPHATE IN THE PRESENCE OF AMMONIA TO PRECIPITATE THE DIBASIC PHOSPHATE WHILE KEEPING THE PH OF THE SOLUTION BELOW 5, AND RECOVERING THE DIBASIC EATH PHOSPHATES.
Claim 2
Dependent Claim
73 words
THE PROCESS OF PREPARING LUMINESCENT GRADE DIBASIC ALKALINE-EARTH PHOSPHATES, SAID PROCESS COMPRISING ADDING A SLOUTION OF A SALT, SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES AND NITRATES OF AN ALKALINE-EARTH METAL SELECTED FROM THE GROUP CONSISTING OF BARIUM STRONTIUM AND CALCIUM TO A SOLUTION OF MONO-AMMONIUM PHOSPHATE IN THE PRESENCE OF AMMONIA TO PRECIPITATE THE DIBASIC PHOSPHATE WHILE KEEPING THE PH OF THE SOLUTION BELOW 5, AND RECOVERING THE DIBASIC EATH PHOSPHATES.
References Cited (Backward Citations)
US2946656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |