Patent US2642335A successfully refreshed from Google Patents.
US2642335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of three-dimensional dendritic sodium chloride crystals
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-01-23
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Granted: 1953-06-16
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Expires: 1970-01-23
Abstract
No abstract record available.
Inventors
- 👤 May Winston Ewart
- 👤 Scott Thomas Reginald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:48
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/26
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A PROCESS FOR THE MANUFACTURE OF SODIUM CHLORIDE OF LOW BULK DENSITY IN THE FORM OF 3-DIMENSIONAL DENDRITES WHICH COMPRISES EVAPORATING SUBTANTIALLY IN THE ABSENCE OF AIR,BRINE CONTAINING AT LEAST 0.5 P. P. M. BY WEIGHT OF AN ALKALI METAL IRON CYANIDE, SAID EVAPORATION BEING CARRIED OUT IN A MANNER TO PERMIT CRYSTALLIZATION TO TAKE PLACE ALMOST ENTIRELY IN THE BODY OF THE BRINE WITH INSUFFICIENT AGITATION TO DISINTEGRATE THE CRYSTALS FORMED.
References Cited (Backward Citations)
US1950459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |