US2773738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New crystalline sodium borate and method for producing the same
Assignee: US Borax Inc
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Filing: 1953-08-24
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Granted: 1956-12-11
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Expires: 1973-08-24
Abstract
No abstract record available.
Inventors
- 👤 Geoffrey R Ball
- 👤 Peter H Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:21
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/055; C01B15/12; C01B35/00; C01B35/06; C01B35/08; C01B35/10; C01B35/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
102 words
THE PROCESS FOR PRODUCING CRYSTALLINE SODIUM TETRABORATE MONOHYDRATE, WHICH COMPRISES PRODUCING AN AQUEOUS SODIUM BORATE SOLUTION HAVING A MOLAR RATIO NA2O/B2O3 BETWEEN 0.4 AND 0.7 AND HAVING A PREDETERMINED WATER CONTENT, AND MAINTAINING THE SOLUTION AT A TEMPERATURE ABOVE ABOUT 115* C. TO DEPOSIT FROM THE SOLUTION CRYSTALS OF SODIUM TETRABORATE MONOHYDRATE, THE SAID WATER CONTENT OF THE SOLUTION BEING INSUFFICIENT TO MAINTAIN ALL THE BORATE IN SOLUTION AT THE SAID TEMPERATURE AND THE SAID MOLAR RATIO HAVING A VALUE THAT IS WITHIN THE SAID RANGE AND IS SUFFICIENTLY HIGH TO PREVENT PRECIPITATION OF 2NA2O.5B2O3.5O2 AT THE SAID TEMPERATURE AND WATER CONTENT.
References Cited (Backward Citations)
US2032388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |