US3032391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of calcium borates
Assignee: US Borax Inc
•
Filing: 1959-07-28
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Granted: 1962-05-01
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Expires: 1979-07-28
Abstract
No abstract record available.
Inventors
- 👤 Ball Geoffrey Robert
- 👤 Bowden Godfrey Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:41
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/08; C01B35/10; C01B35/06; C01B35/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE CYCLIC METHOD OF PRODUCING HYDRATED CRYSTALLINE CALCIUM METABORATE WHICH COMPRISES MAKING AN AQUEOUS SOLUTION OF SODIUM 1:2-BORATE AND AN ALKALI METAL HYDROXIDE, ADDING TO SAID SOLUTION CALCIUM SULFATE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, REMOVING HYDRATED CRYSTALLINE CALCIUM METABORATE AND SODIUM SULFATE FROM THE REACTION MASS, ADDING SODIUM 1:2-BORATE TO THE RESULTANT LIQUOR AND REPEATING THE CYCLE SAID CALCIUM SULFATE AND MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDE AND HYDROXIDE OF CALCIUM ADDED IN A MOLAR RATIO OF FROM ABOUT 1:0.95 TO ABOUT 1:1.05 RESPECTIVELY.
Claim 2
Dependent Claim
96 words
THE CYCLIC METHOD OF PRODUCING HYDRATED CRYSTALLINE CALCIUM METABORATE WHICH COMPRISES MAKING AN AQUEOUS SOLUTION OF SODIUM 1:2-BORATE AND AN ALKALI METAL HYDROXIDE, ADDING TO SAID SOLUTION CALCIUM SULFATE AND A MATERIAL SELECTED FROM THE GROUP CONSISTING OF CALCIUM OXIDE AND CALCIUM HYDROXIDE, REMOVING HYDRATED CRYSTALLINE CALCIUM METABORATE AND SODIUM SULFATE FROM THE REACTION MASS, ADDING SODIUM 1:2-BORATE TO THE RESULTANT LIQUOR AND REPEATING THE CYCLE SAID CALCIUM SULFATE AND MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDE AND HYDROXIDE OF CALCIUM ADDED IN A MOLAR RATIO OF FROM ABOUT 1:0.95 TO ABOUT 1:1.05 RESPECTIVELY.
References Cited (Backward Citations)
GB352137A
Cited
US2717240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |