US2704296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of maleic acid liquors with chlorine
Assignee: Monsanto Chemicals Ltd
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Filing: 1951-12-29
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Granted: 1955-03-15
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Expires: 1971-12-29
Abstract
No abstract record available.
Inventors
- 👤 Elmer H Dobratz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/487
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
IN A PROCESS FOR THE TREATMENT OF CRUDE MALEIC ACID LIQUORS, THE STEPS COMPRISING PASSING FREE CHLORINE INTO THE ACID MALEIC ACID LIQUORS WHILE THE SAID MALEIC ACID LIQUORS ARE MAINTAINED AT TEMPERATURES WITHIN THE RANGE OF ABOUT 70* C. AND THE REFLUXING TEMPERATURES OF THE MALEIC ACID LIQUORS AT ATMOSPHERIC PRESSURE AND THEREAFTER CONTACTING THE MALEIC ACID LIQUORS WITH ACTIVATED CHARCOAL AND SEPARATING THE ACTIVATED CHARCOAL FROM THE MALEIC ACID LIQUORS.
Claim 2
Dependent Claim
72 words
IN A PROCESS FOR THE TREATMENT OF CRUDE MALEIC ACID LIQUORS, THE STEPS COMPRISING PASSING FREE CHLORINE INTO THE ACID MALEIC ACID LIQUORS WHILE THE SAID MALEIC ACID LIQUORS ARE MAINTAINED AT TEMPERATURES WITHIN THE RANGE OF ABOUT 70* C. AND THE REFLUXING TEMPERATURES OF THE MALEIC ACID LIQUORS AT ATMOSPHERIC PRESSURE AND THEREAFTER CONTACTING THE MALEIC ACID LIQUORS WITH ACTIVATED CHARCOAL AND SEPARATING THE ACTIVATED CHARCOAL FROM THE MALEIC ACID LIQUORS.
References Cited (Backward Citations)
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US2208519A
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US2365631A
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US2393352A
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US2349514A
Cited
US2358775A
Cited
US2494049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |