US2625561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluoroaromatic isocyanates
Assignee: EIDP Inc
•
Filing: 1950-10-27
•
Granted: 1953-01-13
•
Expires: 1970-10-27
Abstract
No abstract record available.
Inventors
- 👤 James H Werntz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:18
CPC Classifications
C; C07; C07C; C07C265/00; C07C265/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
A MONONUCLEAR AROMATIC ISOCYANATE CONTAINING IN ADDITION TO THE ISOCYANATE GROUP, AND THAT ON NUCLEAR CARBON, ONLY FLUORINE, CARBON AND HYDROGEN, THE FLUORINE BEING NOT MORE THAN ONE CARBON, AND THAT ALIPHATIC, REMOVED FROM THE RING, SAID ALIPHATIC CARBON BEING FREE FROM HYDROGEN.
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) | 1956-01-13 | 1956-07-14 | 1957-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-13 | 1960-07-14 | 1961-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-13 | 1964-07-14 | 1965-01-13 | $7700.00 | Window Closed / Lapsed |