Patent US3065053A successfully refreshed from Google Patents.
US3065053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous precipitation of dibasic alkaline earth phosphates
Assignee: GTE Sylvania Inc
•
Filing: 1960-02-23
•
Granted: 1962-11-20
•
Expires: 1980-02-23
Abstract
No abstract record available.
Inventors
- 👤 Michael A Aia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:55
CPC Classifications
C; C09; C09K; C09K11/00; C09K11/08; C09K11/70; C09K11/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR PREPARING HIGHLY-CRYSTALLINE DIBASIC ALKALINE-EARTH PHOSPHATES, SAID PROCESS COMPRISING THE FOLLOWING STEPS: DISSOLVING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, HYDROXIDES, CARBONATES, CHLORIDES AND NITRATES OF THE ALKALINE EARTHS IN AN AQUEOUS SOLUTION HAVING AN EXCESS AT ROOM TEMPERATURE OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID AND AMMONIUM PHOSPHATE; THEN ADDING AT LEAST ABOUT 0.02 GRAM-MOLES OF CRYSTALLINE UREA PER LITER OF SOLUTION AND HEATING THE RESULTANT MIXTURE AT A TEMPERATURE OF ABOUT 40 TO 100*C. FOR A TIME SUFFICIENT TO PRECIPITATE THE DIBASIC ALKALINE-EARTH PHOSPHATE.
Claim 2
Dependent Claim
95 words
A PROCESS FOR PREPARING HIGHLY-CRYSTALLINE DIBASIC ALKALINE-EARTH PHOSPHATES, SAID PROCESS COMPRISING THE FOLLOWING STEPS: DISSOLVING A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF THE OXIDES, HYDROXIDES, CARBONATES, CHLORIDES AND NITRATES OF THE ALKALINE EARTHS IN AN AQUEOUS SOLUTION HAVING AN EXCESS AT ROOM TEMPERATURE OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF PHOSPHORIC ACID AND AMMONIUM PHOSPHATE; THEN ADDING AT LEAST ABOUT 0.02 GRAM-MOLES OF CRYSTALLINE UREA PER LITER OF SOLUTION AND HEATING THE RESULTANT MIXTURE AT A TEMPERATURE OF ABOUT 40 TO 100*C. FOR A TIME SUFFICIENT TO PRECIPITATE THE DIBASIC ALKALINE-EARTH PHOSPHATE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |