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Patent US3179680A successfully refreshed from Google Patents.
US3179680A
Expired / Lapsed
US
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Purification of organic isocyanates
Assignee: Olin Corp
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Filing: 1962-10-31
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Granted: 1965-04-20
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Expires: 1982-10-31
Abstract
No abstract record available.
Inventors
- 👤 Ehrenfried H Kober
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE PROCESS FOR REDUCING THE CONCENTRATION OF HYDROLYZABLE CHLORIDE IN AN ORGANIC ISOCYANATE CONTAINING HYDROLYZABLE CHLORIDE, SAID ORGANIC ISOCYANATE BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC ISOCYANATES AND ALIPHATIC ISOCYANATES, WHICH COMPRISES ADMIXING SAID ORGANIC ISOCYANATE WITH WATER TO EFFECT HYDROLYSIS OF CHLORIDE CONTAINED THEREIN, AND REMOVING HYDROGEN CHLORIDE AS IT IS FORMED FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
58 words
THE PROCESS FOR REDUCING THE CONCENTRATION OF HYDROLYZABLE CHLORIDE IN AN ORGANIC ISOCYANATE CONTAINING HYDROLYZABLE CHLORIDE, SAID ORGANIC ISOCYANATE BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC ISOCYANATES AND ALIPHATIC ISOCYANATES, WHICH COMPRISES ADMIXING SAID ORGANIC ISOCYANATE WITH WATER TO EFFECT HYDROLYSIS OF CHLORIDE CONTAINED THEREIN, AND REMOVING HYDROGEN CHLORIDE AS IT IS FORMED FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
US2620349A
Cited
US2808371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |