Patent US2885424A successfully refreshed from Google Patents.
US2885424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of organic isocyanates
Assignee: EIDP Inc
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Filing: 1956-01-27
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Granted: 1959-05-05
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Expires: 1976-01-27
Abstract
No abstract record available.
Inventors
- 👤 Spiegler Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:13
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
AN ORGANIC ISOCYANATE OF THE CLASS CONSISTING OF ALIPHATIC, CYCLOALIPHATIC AND AROMATIC ISOCYANATES STABILIZED AGAINST DISCOLORATION BY HAVING DISSOLVED THEREIN FROM 0.01% TO 0.5% BY WEIGHT, BASED ON THE ISOCYANATE, OF AN ESSENTIALLY COLORLESS URETHANE COMPOUND CONTAINING ONE MONONUCLEAR RADICAL ATTACHED DIRECTLY TO THE NITROGEN OF THE URETHANE GROUP.
Claim 2
Dependent Claim
49 words
AN ORGANIC ISOCYANATE OF THE CLASS CONSISTING OF ALIPHATIC, CYCLOALIPHATIC AND AROMATIC ISOCYANATES STABILIZED AGAINST DISCOLORATION BY HAVING DISSOLVED THEREIN FROM 0.01% TO 0.5% BY WEIGHT, BASED ON THE ISOCYANATE, OF AN ESSENTIALLY COLORLESS URETHANE COMPOUND CONTAINING ONE MONONUCLEAR RADICAL ATTACHED DIRECTLY TO THE NITROGEN OF THE URETHANE GROUP.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |