Patent US3634043A successfully refreshed from Google Patents.
US3634043A
Expired / Lapsed
US
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Vacuum crystallizing of solution in a hydrocarbon liquid in the presence of water
Assignee: Struthers Scientific and International Corp
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Filing: 1969-03-19
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Granted: 1972-01-11
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Expires: 1989-03-19
Abstract
Abstract Crystallization of a solid from a hydrocarbon solvent, such as sulfur from kerosene, is accomplished by the direct contact evaporation of water which is introduced into the solution and evaporated therefrom to cool the solution.
Inventors
- 👤 Stephen Anthony Laurich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:04
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/0205; B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0036; Y; Y10; Y10S; Y10S159/00; Y10S159/17; Y10S159/33
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
18 words
The process according to claim 1 wherein the evaporated water is condensed and reintroduced into the recirculating solution.
Claim 2
Dependent Claim
15 words
The process according to claim 1, wherein the solvent is kerosene and solid is sulfur.
Claim 3
Dependent Claim
15 words
The process according to claim 3 wherein the water is evaporated at about 195* F.
References Cited (Backward Citations)
GB366052A
Cited
US2234269A
Cited
US2623814A
Cited
US2841536A
Cited
US3098735A
Cited
US3251193A
Cited
US3419899A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |