US2957903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of organic isocyanates
Assignee: EIDP Inc
•
Filing: 1959-03-24
•
Granted: 1960-10-25
•
Expires: 1979-03-24
Abstract
No abstract record available.
Inventors
- 👤 Spiegler Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:56
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/10; C07C265/12; C07C265/14; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
AN ORGANIC ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC, CYCLOALIPHATIC AND AROMATIC ISOCYANATES, STABILIZED AGAINST DISCORLORATION BY HAVING DISSOLVED THEREIN FROM ABOUT 0.05% TO 0.5% BY WEIGHT, BASED ON THE ISOCYANATE, OF AN ESSENTIALLY COLORELESS TRIARYL PHOSPHITE OF THE FORMULA (RO)3P, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF A PHENYL RADICAL, A NAPTHYL RADICAL, AN ALKYL-SUBSTITUTED PHENYL RADICAL, AND A CHLORO-SUBSTITUTED PHENYL RADICAL.
Claim 2
Dependent Claim
66 words
AN ORGANIC ISOCYANATE SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC, CYCLOALIPHATIC AND AROMATIC ISOCYANATES, STABILIZED AGAINST DISCORLORATION BY HAVING DISSOLVED THEREIN FROM ABOUT 0.05% TO 0.5% BY WEIGHT, BASED ON THE ISOCYANATE, OF AN ESSENTIALLY COLORELESS TRIARYL PHOSPHITE OF THE FORMULA (RO)3P, WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF A PHENYL RADICAL, A NAPTHYL RADICAL, AN ALKYL-SUBSTITUTED PHENYL RADICAL, AND A CHLORO-SUBSTITUTED PHENYL RADICAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |