US4650658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable crystals of sodium bromite trihydrate
Assignee: Tosoh Silica Corp
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Filing: 1985-11-12
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Granted: 1987-03-17
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Expires: 2005-11-12
Abstract
Abstract NaBrO2.3H2O crystals with excellent storage stability which contain at least 30 wt. % of NaBrO2.3H2O and 0.5-5.0 wt. % of NaOH. The crystals are produced by precipitation from NaBrO2 solutions containing NaOH and impurities and are very useful as oxidizing and brominating agents.
Inventors
- 👤 Hisao Shiozawa
- 👤 Kihachiro Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:01
CPC Classifications
C; C01; C01B; C01B11/00; C01B11/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
30 words
NaBrO 2 . 3H 2 O crystals having excellent storage stability comprising at least 30 wt. % of NaBrO 2 . 3H 2 O and 0.5-5.0 wt. % of NaOH.
Claim 2
Dependent Claim
30 words
NaBrO 2 . 3H 2 O crystals having excellent storage stability comprising at least 30 wt. % of NaBrO 2 . 3H 2 O and 0.5-5.0 wt. % of NaOH.
Claim 3
Dependent Claim
21 words
The crystals according to claim 1, in which said NaOH is present as a coating on the surface of the crystals.
References Cited (Backward Citations)
US3085854A
Cited
US3967039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |