US3155699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of isocyanates by reduction of the hydrolyzable chlorine and acid content
Assignee: Bayer Corp
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Filing: 1960-03-30
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Granted: 1964-11-03
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Expires: 1980-03-30
Abstract
No abstract record available.
Inventors
- 👤 Eugene L Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:11
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF REDUCING THE HYDROLYZABLE CHLORINE AND ACIDIC CONSTITUENTS OF AN ORGANIC ISOCYANATE SUBSTANTIALLY FREE OF CHEMICALLY BONDED CHLORINE AND CONTAINING HYDROLYZABLE CHLORINE AND ACIDIC CONSTITUENTS AS AN IMPURITY THEREWITH, WHICH COMPRISES TREATING SAID ORGANIC ISOCYANATE MIXTURES WITH FROM 0.01 TO 2 MOL PERCENT, BASED ON SAID ISOCYANATE, OF A METALLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF FERRIC CHLORIDE, FERROUS CHLORIDE, STANNIC CHLORDIE, BISMUTH TRICHLORIDE, ZINCCHLORIDE, CADMIUM CHLORIDE, ALUMINUM CHLORIDE, AND FERRIC BENZOATE, AND RECOVERING THE PURIFIED ISOCYANATE FROM THE RESULTING MIXTURE.
Claim 2
Independent Claim
84 words
A METHOD OF REDUCING THE HYDROLYZABLE CHLORINE AND ACIDIC CONSTITUENTS OF AN ORGANIC ISOCYANATE SUBSTANTIALLY FREE OF CHEMICALLY BONDED CHLORINE AND CONTAINING HYDROLYZABLE CHLORINE AND ACIDIC CONSTITUENTS AS AN IMPURITY THEREWITH, WHICH COMPRISES TREATING SAID ORGANIC ISOCYANATE MIXTURES WITH FROM 0.01 TO 2 MOL PERCENT, BASED ON SAID ISOCYANATE, OF A METALLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF FERRIC CHLORIDE, FERROUS CHLORIDE, STANNIC CHLORDIE, BISMUTH TRICHLORIDE, ZINCCHLORIDE, CADMIUM CHLORIDE, ALUMINUM CHLORIDE, AND FERRIC BENZOATE, AND RECOVERING THE PURIFIED ISOCYANATE FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |